Causation in Correctional Medical Cases

Scope and warning#

This page addresses causation in claims arising from medical care, or its absence, in California county jails and state prisons, including care furnished by private contractors: federal claims under 42 U.S.C. § 1983 under the Fourteenth Amendment (pretrial detainees; Roadmap 042) and the Eighth Amendment (convicted prisoners; Roadmap 043), entity claims under Monell (Roadmaps 046–049), and California claims for professional negligence, for failure to summon medical care under Gov. Code § 845.6, for wrongful death and for survival. It does not restate the culpability standards (Roadmaps 042–044), the standard of care (Roadmap 066), the qualifications and disclosure of experts (Roadmap 074), the measure of damages (Roadmap 076; matrix 096.2), the wrongful-death and survival actions as such (Roadmap 065) or county–contractor allocation (Roadmap 086). It cross-refers to each.

Every proposition is graded: Settled (statute text or a binding holding); Majority/likely (consistent appellate treatment); Unsettled/split; Documented report (a public record describing something not adjudicated); Analytical inference (this page's reasoning, which counsel must test). Several Ninth Circuit opinions quoted here were decided at summary judgment, where the evidence is viewed in the plaintiff's favor; what a court says a jury could find is not what a plaintiff must prove at trial, and the page marks the difference each time. California statutes were read on a reproduction host because the official legislative host refused automated requests this session; those entries are verified with limitation. This page is general legal education. It is not legal advice, and it does not assess any person's matter.

Source-status addendum (14 October 2026): A court-hosted, expressly nonprecedential 2024 Ninth Circuit memorandum and published causation decisions were examined for this private revision. A nonprecedential disposition can illustrate a proof failure or disagreement but does not establish generally binding law. The court-hosted PDF was inspected directly; California opinions cited through case-law reproductions are not asserted to be authenticated court-original PDFs. The official California judicial-instructions landing page was opened, but the full 2026 supplement PDF was not obtained through the research interface. This is targeted legal research, not a full citator investigation, official validation of every statute, or contextual privacy clearance.

The factual situation this roadmap addresses#

A generic hypothetical. A 58-year-old man is booked into a county jail on a pretrial hold late on Day 1. He tells the intake nurse that he takes insulin twice daily for type 2 diabetes, that he has chronic kidney disease, and that he drinks heavily every day. The intake form records all three. Medical care at the jail is furnished by a private contractor under a contract with the county; the nurses and the on-call physician work for the contractor; the deputies who staff the housing unit work for the sheriff. An alcohol-withdrawal protocol is started. Insulin is ordered, but the medication administration record shows the Day 2 morning dose as "not given — out of unit" and the evening dose as "refused."

At 14:00 on Day 2 the man submits a sick-call request reporting vomiting and abdominal pain. A nurse sees him at 15:30 and records a fingerstick glucose of 412 mg/dL, a pulse of 118, a blood pressure of 98/60 and a respiratory rate of 24, and attributes the vomiting to alcohol withdrawal. She telephones the on-call physician, whose verbal order — transcribed by the nurse — is "recheck glucose in four hours; push fluids." No recheck is documented. At 20:10 a medication-pass nurse records "refused fingerstick." Overnight, the housing log shows thirty-minute welfare checks; the unit's video shows several checks lasting seconds, from the corridor. An intercom call from the cell at 01:52 is logged "no emergency stated." At 03:10 his cellmate calls "man down." Paramedics are summoned at 03:22 and arrive at 03:41.

At the hospital the man is in diabetic ketoacidosis: arterial pH 6.95, serum bicarbonate 4, potassium 6.1, creatinine 4.2 (his baseline, from a clinic record obtained later, was 1.9). A chest radiograph shows a right lower-lobe infiltrate consistent with aspiration. He is intubated and admitted to intensive care. Antibiotics are started some hours after admission. He develops septic shock and dies on hospital Day 4. The coroner's autopsy lists the cause of death as "complications of diabetic ketoacidosis," with "aspiration pneumonia," "hypertensive and atherosclerotic cardiovascular disease" and "chronic kidney disease" as other significant conditions, and the manner as "natural."

A variant, used below where it matters: the man survives, but leaves the hospital dependent on dialysis.

Every person and fact here is invented. The hypothetical is designed to separate the causation questions that arise in most custody cases: which act or omission, by whom, in which window of time, caused which injury, against the background of which pre-existing disease and which later events.

Governing law#

Two components: cause in fact and proximate cause

A § 1983 plaintiff must prove that the defendant's conduct caused the injury, and causation has two parts. The Ninth Circuit put it directly in a custody-death case: plaintiffs alleging deliberate indifference "must also demonstrate that the defendants' actions were both an actual and proximate cause of their injuries" (Lemire, slip op. at 19, citing Conn v. City of Reno, 591 F.3d 1081, 1098–1101 (9th Cir. 2010), vacated, 131 S. Ct. 1812 (2011), reinstated in relevant part, 658 F.3d 897 (9th Cir. 2011), subsequent history as stated in Lemire). (Grade: Settled in the Ninth Circuit.)

Cause in fact is the counterfactual. Conn defined it in the classic terms: the conduct is an actual cause if the "injury would not have occurred 'but for' that conduct." The Ninth Circuit's model instruction for every individual-capacity § 1983 claim now states it the same way, with a limiting clause: "Third, the defendant [name]'s conduct was an actual cause of the claimed injury," and the conduct is an actual cause "only if the injury would not have occurred 'but for' that conduct," "and the conduct has a sufficient connection to the result" (Ninth Cir. Manual of Model Civil Jury Instructions, Instruction 9.3 (rev. Sept. 2025)). The instruction's Comment adds, quoting circuit authority, that "To meet this causation requirement, the plaintiff must establish both causation-in-fact and proximate causation" (Instruction 9.3 Comment, quoting Bearchild v. Cobban, which in turn quotes Harper v. City of Los Angeles; each not opened). (Grade: Settled in the Ninth Circuit as to the two-part requirement; the model instruction is not itself law but states the circuit's formulation.)

Proximate cause asks whether, granted that the conduct was a but-for cause, the law should hold the defendant responsible for this injury. The Supreme Court has said that § 1983 "creates a species of tort liability" and that proximate cause in a § 1983 case calls for consideration of "foreseeability or the scope of the risk created by the predicate conduct" and "some direct relation between the injury asserted and the injurious conduct alleged" (County of Los Angeles v. Mendez, No. 16-369 (U.S. 2017), quoting Heck and Paroline, each not opened). In Mendez the Court vacated a judgment resting on a theory it rejected and directed that on remand "the court should revisit the question whether proximate cause permits respondents to recover damages." (Grade: Settled that proximate cause applies and is analyzed through foreseeability and scope of risk.) The outer limit is remoteness: in Martinez v. California, 444 U.S. 277, 285 (1980), a death caused by a parolee five months after release was "too remote a consequence of the parole officers' action to hold them responsible under the federal civil rights law," where the parolee "was in no sense an agent of the parole board" and the board was not shown to have been aware that the decedent, "as distinguished from the public at large, faced any special danger." (Grade: Settled.)

Foreseeability in this sense often favors plaintiffs in custody cases, because the risk that makes care constitutionally required is usually the very risk that materializes (Analytical inference). Conn held that "foreseeable intervening causes . . . will not supersede the defendant's responsibility," citing Prosser and Keeton after a discussion of the Restatement (Second) of Torts §§ 440–453 (neither opened), and Lemire held that a plaintiff who creates a triable issue on exposure to a substantial risk, and who then suffered "precisely the type of harm that was foreseen," will typically also create a triable issue on causation (slip op. at 31). The harm need not have been the likeliest outcome: "the harm he actually suffered need not have been the most likely result among this range of outcomes" (Lemire, slip op. at 22, citing Gibson v. County of Washoe, 290 F.3d 1175 (9th Cir. 2002)). (Grade: Settled in the Ninth Circuit.) Whether causation is decided by the court or the jury follows the ordinary rule: where reasonable people could differ, it is for the jury, and Conn, quoting White v. Roper, 901 F.2d 1501 (9th Cir. 1990) (not opened), held that "summary judgment is inappropriate and the question should be left to the jury" on the record before it. (Grade: Settled as a general rule; the application is always record-specific.)

The published Ninth Circuit decision Chaudhry v. Aragón, 68 F.4th 1161, 1169–70 & n.11 (9th Cir. 2023), reiterates that § 1983 demands both actual and proximate cause and expressly uses the White v. Roper but-for formulation; its merits text was inspected in an identified judicial reproduction rather than authenticated from a court-hosted original. It is not the different 2014 Chaudhry v. City of Los Angeles survival-damages case. A theoretical policy deficiency or evidence of an unmet medical need is not, without a proved causal chain, enough. (Grade: Published appellate holding for the rule; source provenance: reproduction.)

Causation inside the constitutional standards

Causation is not only a background tort principle; each constitutional medical-care standard contains it as an element.

For a pretrial detainee, the fourth element of the Ninth Circuit's Fourteenth Amendment test is that "by not taking such measures, the defendant caused the plaintiff's injuries" (Gordon v. County of Orange, 888 F.3d 1118 (9th Cir. 2018), AR-0961-C01; the same element appears in Castro v. County of Los Angeles, 833 F.3d 1060 (9th Cir. 2016) (en banc), slip op. at 20: "By not taking such measures, the defendant caused the plaintiff's injuries"). The model instruction tracks it: "Fourth, by not taking such measures the defendant [name] caused the plaintiff [name]'s injuries" (Instruction 9.34 (rev. Sept. 2025)). (Grade: Settled in the Ninth Circuit.) The culpability element — "more than negligence but less than subjective intent—something akin to reckless disregard" (Gordon) — is separate, and proof of it does not prove causation. In Gordon itself, the plaintiff's expert offered the opinion that "it is more probable than not that Gordon would have been found to be in medical distress hours prior to his death" — a causation-shaped opinion addressed to what timely observation would have revealed, offered in a case the court vacated and remanded for further proceedings. (Grade: Documented report of the record in Gordon; the opinion was not adjudicated as sufficient.)

For a convicted prisoner, the Eighth Amendment's deliberate-indifference prong "is satisfied by showing (a) a purposeful act or failure to respond to a prisoner's pain or possible medical need and (b) harm caused by the indifference" (Jett v. Penner, 439 F.3d 1091 (9th Cir. 2006), AR-C31). Conn framed the same structure as three requirements — "serious medical need, indifference to that need, and harm caused by that indifference." The model instruction's third element is that "the [act[s]] [failure to act] of the defendant [name] caused harm to the plaintiff [name]" (Instruction 9.31 (rev. Mar. 2026)). (Grade: Settled in the Ninth Circuit.) Under both amendments, medical malpractice does not become a constitutional violation because the patient is in custody (Estelle v. Gamble, 429 U.S. 97 (1976), AR-0961-C02), and a strong causation case does not cure a weak culpability case. Roadmap 044 develops the difference.

Delay and the harm requirement

Most custody cases are delay cases, and the Ninth Circuit has long required that delay be shown to have caused harm. Shapley v. Nevada Board of State Prison Commissioners, 766 F.2d 404, 407 (9th Cir. 1985), held that "mere delay of surgery, without more, is insufficient to state a claim of deliberate medical indifference" "unless the denial was harmful." (Grade: Settled.)

The circuit's formulations of how much harm is required have not been uniform, and a careful brief cites them in order:

• Wood v. Housewright, 900 F.2d 1332 (9th Cir. 1990), read Shapley to mean that "the delay must have caused substantial harm," and found no such harm where the condition "did not require emergency attention."
• McGuckin v. Smith, 974 F.2d 1050 (9th Cir. 1992), stated that "a finding that the defendant's activities resulted in 'substantial' harm to the prisoner is not necessary," though such harm "tends to provide additional support to a claim that the defendant was 'deliberately indifferent.'" (Its subsequent history was not confirmed on the host and should be checked in a citator before it is cited.)
• Hallett v. Morgan, 296 F.3d 732 (9th Cir. 2002), quoting Hunt v. Dental Department (not opened), restated that delay in providing a prisoner with dental treatment does not by itself constitute an Eighth Amendment violation, and rejected the plaintiffs' claim where they had not shown "delays occurred to patients with problems so severe that delays would cause significant harm."
• Jett v. Penner followed McGuckin: "A prisoner need not show his harm was substantial," although substantial harm "would provide additional support" for the claim. Indifference "may appear when prison officials deny, delay or intentionally interfere with medical treatment." In Jett a fractured thumb that "had healed improperly" was a sufficient harm, and the resulting "deformity was inferentially caused by the delay in referring him to an orthopedist."
• Colwell v. Bannister, 763 F.3d 1060 (9th Cir. 2014) (No. 12-15844), reversed summary judgment where the district court had held that the prisoner did not show that the decision to delay or deny cataract surgery caused harm: the prisoner "continues to suffer blindness in his right eye, which is harm in and of itself," and "his monocular blindness caused him physical injury" (slip op. at 13–14). The dissent, quoting Shapley, would have held that "he cannot show that the denial of cataract surgery caused any harm."
• Stewart v. Aranas, No. 20-15586 (9th Cir. May 4, 2022), affirming a denial of qualified immunity: "A delay in treatment can violate the constitution if it results in injury," and "At some point 'wait and see' becomes deny and delay."

(Grade: Settled that delay must cause harm. Unsettled/split in formulation as to whether the harm must be "substantial": Wood requires "substantial" harm and Hallett speaks of "significant harm"; McGuckin and Jett reject it as a requirement. Majority/likely: the later formulations — Jett, Colwell, Stewart — treat any non-trivial injury attributable to the delay, including continuing pain and lost function, as sufficient, with severity bearing on culpability and damages. Analytical inference: the defense will still cite Wood and Hallett, and the plaintiff's answer is to prove the harm concretely rather than to argue about the adjective.)

Two points follow for practice. First, the harm must be caused by the delay, not merely suffered during it: pain that the underlying disease would have produced anyway, with or without timely care, is not harm caused by the delay. Second, the harm can be the interval itself — prolonged pain, prolonged blindness, a thumb that heals deformed — and need not be death or permanent injury. Colwell is the clearest statement that a continuing loss of function is itself the injury.

An adversarial proof check from a real CFMG-related appellate record (nonprecedential)

In Hernandez v. County of Alameda, No. 23-15246, memorandum at 2–5 (9th Cir. Oct. 17, 2024), the majority reversed summary judgment only as to a sufficiently supported pre-death, nonfatal injury theory while affirming summary judgment on causation of death. The majority found gaps between investigating a warning sign, detecting the asserted disease, determining whether treatment existed, and showing treatment probably would have prevented death. It assumed deliberate indifference without deciding it for the partial reversal. The memorandum was explicitly marked not for publication and not precedent except as Ninth Circuit Rule 36-3 permits. Its result is an illustration of how counsel and experts should test a counterfactual, not authority establishing any CFMG misconduct in another situation. It is not a judgment finding that CFMG caused death, and it must not be used to imply such a finding. (Grade: Directly inspected official court-hosted unpublished memorandum, illustrative only.)

The decision included two separately reasoned partial dissents: one would have rejected the short-of-death theory; another would have permitted the death-causation claim to proceed. Those dissents are not controlling. The divided treatment highlights two hazards: (1) confusing risk indicators with proof of a particular preventable outcome and (2) treating causation of pre-death harm as identical to causation of death. The memorandum also discusses survival damages under Chaudhry v. City of Los Angeles in circumstances that counsel must reconcile with Chaudhry’s express death-caused-by-violation wording and the operative version of Code Civ. Proc. § 377.34; do not turn the memorandum into a categorical survival-damages rule. (Grade: Direct inspection; limited persuasive illustration, not a citator clearance.)

Individual causation: personal participation, setting in motion, integral participation and supervisors

Section 1983 has no vicarious liability; each defendant answers only for that defendant's own conduct (Ashcroft v. Iqbal, 556 U.S. 662 (2009), AR-0961-C05; Monell v. Department of Social Services, 436 U.S. 658 (1978), AR-0961-C04). Causation is therefore individualized: "The inquiry into causation must be individualized and focus on the duties and responsibilities of each individual defendant" whose acts or omissions are alleged to have caused the deprivation, and "Sweeping conclusory allegations will not suffice to prevent summary judgment" (Leer v. Murphy, 844 F.2d 628 (9th Cir. 1988)). Leer affirmed summary judgment where the record did not show that each official's indifference "was the actual and proximate cause of the deprivation of the inmates' eighth amendment right." (Grade: Settled.)

Personal participation in the narrow sense is not the only route. A person "subjects" another to a deprivation "if he does an affirmative act, participates in another's affirmative acts, or omits to perform an act" which he is legally required to do that causes the deprivation, and "personal participation is not the only predicate for section 1983 liability": the requisite causal connection can be established by "setting in motion a series of acts by others which the actor knows or reasonably should know" would cause others to inflict the constitutional injury (Johnson v. Duffy, 588 F.2d 740, 743–44 (9th Cir. 1978); applied in Conn). (Grade: Settled.) Conn is the custody illustration: officers who had transported a woman to jail, and who did not report what the court called her "choking and threat of suicide," argued that later medical evaluations finding no suicide risk broke the chain; the court answered that "By failing to report Clustka's choking and threat of suicide, the officers rendered these reviews of little value." The later evaluations were not superseding causes because the omission had deprived them of the information that would have given them value. (Grade: Settled in the Ninth Circuit on that record.)

Integral participation. Where several people act together, the Ninth Circuit's integral-participant doctrine attributes causation to a defendant "only if (1) the defendant knew about and acquiesced in the constitutionally defective conduct as part of a common plan with those whose conduct constituted the violation, or (2) the defendant set in motion a series of acts by others which the defendant knew or reasonably should have known would cause others to inflict the constitutional injury" (Instruction 9.3 Comment, quoting Peck v. Montoya, 51 F.4th 877, 891 (9th Cir. 2022), and citing Reynaga Hernandez v. Skinner, 969 F.3d 930 (9th Cir. 2020), as the decision that first discussed the minimum level of involvement the doctrine requires, each not opened; the Comment states that the model instruction "will need to be modified" when liability is alleged on this basis). (Grade: Settled in the Ninth Circuit as described in the official Comment; the cases themselves were not opened and are description level.) Integral participation is not a device for attributing a whole shift's conduct to every person on it. In a medical case it asks, for each nurse, physician or deputy, whether that person's own decision was a knowing part of a common course of conduct, or set in motion acts by others, that produced the injury (Analytical inference).

Supervisors. A supervisor is liable for the supervisor's own culpable action or inaction in the training, supervision or control of subordinates if "a sufficient causal connection exists between the supervisor's unlawful conduct and the constitutional violation," and "The requisite causal connection can be established by setting in motion a series of acts by others" or by knowingly refusing to terminate them (Lemire, slip op. at 19, 41, citing Starr v. Baca, 652 F.3d 1202 (9th Cir. 2011), AR-C33). In Lemire the failure-to-train claims against the warden and the chief medical officer failed on this element: the medical staff's CPR training had lapsed, but "there is no evidence that Carey or Tranquina knew or had reason to know of this lapse" (the opinion's spelling at that point; its caption reads "Traquina"). (Grade: Settled in the Ninth Circuit.)

A clinical illustration of individual causation. Lemire also illustrates individual causation in an emergency. Correctional officers who found an unresponsive prisoner did not begin CPR; medical staff who arrived determined he was "beyond resuscitation"; but paramedics worked on him for almost twenty minutes, and a nurse estimated he "could have died any time between six and thirty minutes prior to the time she evaluated him." On that record, "a jury could reasonably determine that St. Jovite was alive and capable of being revived if CPR had been timely provided," and "a jury could conclude that had Cahoon and Holliday provided CPR immediately, St. Jovite might have survived" (slip op. at 39–40). (Grade: Settled as a summary-judgment holding. Analytical inference: "might have survived" is the language of a triable issue viewed in the plaintiff's favor; at trial the plaintiff must persuade the jury by a preponderance that the omission was a but-for cause of death, and a defense lawyer will rightly insist on that distinction.)

Entity causation: the moving force

A county, and a private contractor acting under color of state law, is liable under § 1983 only for its own policy, custom or decision, never vicariously (Monell, AR-0961-C04; Tsao v. Desert Palace, Inc., 698 F.3d 1128 (9th Cir. 2012), AR-0961-C08; West v. Atkins, 487 U.S. 42 (1988), AR-0961-C07, on contract physicians; Roadmaps 046–048). Entity causation is stricter than individual causation, and the Supreme Court has explained why.

City of Canton v. Harris, 489 U.S. 378 (1989) (AR-C34), held that "a municipality can be liable under § 1983 only where its policies are the 'moving force [behind] the constitutional violation'" (at 389); that for a training theory "the identified deficiency in a city's training program must be closely related to the ultimate injury" (at 391); and that the causal question is concrete: "Would the injury have been avoided had the employee been trained under a program that was not deficient in the identified respect?" (at 391). It is not enough that "an injury or accident could have been avoided" with better training, and "That a particular officer may be unsatisfactorily trained will not alone suffice to fasten liability on the city" (at 390–91). (Grade: Settled.)

Board of County Commissioners of Bryan County v. Brown, 520 U.S. 397 (1997), added that the plaintiff "must demonstrate a direct causal link between the municipal action and the deprivation of federal rights" (at 404); that where a facially lawful action is said to have "led an employee to violate a plaintiff's rights" (at 407), "rigorous standards of culpability and causation must be applied" (at 405); and that without them "municipal liability collapses into respondeat superior liability" (at 415). For a single hiring decision, the specific constitutional violation had to be "the plainly obvious consequence of the decision to hire the applicant" (at 411). (Grade: Settled.) Brown distinguished the case "Where a plaintiff claims that a particular municipal action itself violates federal law" (at 404), in which fault and causation are more readily established, from the case in which a facially lawful action is said to have produced an employee's unconstitutional conduct, in which the causal showing is at its most demanding.

The Ninth Circuit applies these rules in jails. In Castro, a failure-to-protect case arising from a jail sobering cell rather than a medical-care case, the en banc court framed the question as "whether there is a direct causal link between a municipal policy or custom and the alleged constitutional deprivation," observed that "The Supreme Court has strongly suggested that the deliberate indifference standard for municipalities is always an objective inquiry," and affirmed the judgment against the entity defendants where the evidence permitted a finding that, under a different practice, the attack "could have been averted" (slip op. at 27–33). In Gibson v. County of Washoe (AR-C40), a county policy under which a detainee's medical screening "will be delayed" if the detainee was "combative, uncooperative or unable to effectively answer questions" was analyzed as a policy that could itself violate the right to medical care, and "on the summary judgment record a jury easily could conclude that the County caused Gibson's death"; a separate policy governing detainees' prescription medications was analyzed as an omission, for which the court asked whether the injury would have been avoided under a policy that used the medication information, and held that a jury could find the nurse would likely have recommended a mental hospital (¶¶ 54, 76–77 as numbered on the host). (Grade: Settled in the Ninth Circuit; both are fact-bound, both preceded Gordon's statement of the individual standard, and Gibson's analysis of the individual deputies predates the objective standard now applied to pretrial detainees' claims.) The Ninth Circuit's model instruction requires that the policy, practice or custom be "so closely related to the deprivation of the plaintiff [name]'s rights as to be the moving force that caused the ultimate injury," and its Comment states that "the plaintiff must show both causation-in-fact and proximate causation" (Instruction 9.5 (rev. Mar. 2024) and Comment, quoting Gravelet-Blondin v. Shelton, not opened). (Grade: Settled in the Ninth Circuit.) Roadmap 047 carries the policy-and-custom doctrine; this page addresses only the causal link.

California negligence causation: the substantial-factor test

California instructs juries on causation in negligence cases through the substantial-factor test. The Supreme Court disapproved the former proximate-cause instruction, BAJI No. 3.75, in favor of the substantial-factor formulation, and held that "the 'substantial factor' test subsumes the 'but for' test" (Mitchell v. Gonzales (1991) 54 Cal.3d 1041, 1052, 1054). The test is broad in the sense that it requires "only that the contribution of the individual cause be more than negligible or theoretical," and "Undue emphasis should not be placed on the term 'substantial'" (Rutherford v. Owens-Illinois, Inc. (1997) 16 Cal.4th 953, 969, 978); but a force that plays only an "infinitesimal" or "theoretical" part is not a substantial factor. (Grade: Settled.)

The pattern instruction states the rule: "A substantial factor in causing harm is a factor that a reasonable person would consider to have contributed to the harm. It must be more than a remote or trivial factor. It does not have to be the only cause of the harm," with an optional sentence that makes the counterfactual explicit — "[Conduct is not a substantial factor in causing harm if the same harm would have occurred without that conduct.]" (CACI No. 430 (2026 ed.)). The Directions for Use explain that, as phrased, the definition "subsumes the 'but for' test of causation," that omitting the optional sentence may be error in some cases, and that the sentence is omitted where multiple independent forces would each have been sufficient to cause the harm. (Grade: Settled as to the instruction's text; CACI is approved by the Judicial Council and is not itself a statute.)

The substantial-factor rule does not dispense with proof. "[T]he plaintiff must show that the defendant's act or omission was a 'substantial factor' in bringing about the injury," "A mere possibility of such causation is not enough," and "proof of causation cannot be based on mere speculation, conjecture and inferences drawn from other inferences" (Saelzler v. Advanced Group 400 (2001) 25 Cal.4th 763, 774–775, quoting Prosser and Keeton and Leslie G.). Saelzler affirmed summary judgment for defendants because the plaintiff could not show that their omissions "were a substantial factor in causing her injuries" (at 781). (Grade: Settled.) Rutherford held that no burden-shifting instruction on causation was necessary in the asbestos cases before it (at 958, 977); no authority opened this session shifts the burden of proving causation in a medical case. (Grade: Settled as to Rutherford's holding; Analytical inference as to medical cases.)

Reasonable medical probability and the rejection of lost-chance recovery

In medical cases, California adds a rule about the quality of causal proof. "[C]ausation must be proven within a reasonable medical probability based upon competent expert testimony. Mere possibility alone is insufficient to establish a prima facie case" (Jones v. Ortho Pharmaceutical Corp., 163 Cal.App.3d at 402). "A possible cause only becomes 'probable' when, in the absence of other reasonable causal explanations, it becomes more likely than not that the injury was a result of its action" (at 403). The plaintiff "must therefore produce evidence which supports a logical inference in his favor and which does more than merely permit speculation or conjecture" (at 402). (Grade: Majority/likely — consistent appellate treatment; Jones is a Court of Appeal decision, quoted in Dumas below.)

California has declined to compensate a lost chance of survival as such. In Dumas v. Cooney (1991) 235 Cal.App.3d 1593, a delayed lung-cancer diagnosis case, the court held that "the trial court erred by giving the jury in this case the instruction on lost chance" (at 1611) and "decline[d] to establish a more lenient standard of causation in medical malpractice cases" (at 1608), reasoning that the theory "radically alters the meaning of causation" (at 1610), that "The true injury in lost chance cases is therefore the death or adversity" (at 1609), and that "[s]weeping modifications of tort liability law fall more suitably within the domain of the Legislature" (at 1611). In Bromme v. Pavitt (1992) 5 Cal.App.4th 1487, a wrongful-death action arising from a delayed colon-cancer diagnosis, the court agreed with Dumas and held that a plaintiff "fails to satisfy the requisite causation" where the decedent "did not have a greater than 50 percent chance of survival had the defendant properly diagnosed and treated the condition" (at 1493), that the plaintiff "must prove the death was 'caused by' the defendant's wrongful act or neglect" (at 1497), and that "California does not recognize a cause of action for wrongful death based on medical negligence where the decedent" had a 50 percent or lower chance of survival with proper care (at 1504–05). Bromme affirmed a partial nonsuit that withdrew from the jury the defendant's alleged negligence after the point — "June 1981 was the last point defendant's negligence could have caused Bromme's death" (at 1509) — after which, on the expert testimony, the decedent's chance of survival had dropped to between 35 and 40 percent, from an estimated 70 to 75 percent a year earlier (at 1494–1495, 1509). (Grade: Majority/likely — consistent Court of Appeal authority, not a California Supreme Court holding; counsel should check for any later contrary authority.)

Bromme's "last point" is useful only when case-specific admissible expert evidence supports a defined survival counterfactual. The 50-percent discussion arose in a delayed-diagnosis medical-negligence wrongful-death record involving a particular progressive cancer; it is not a self-executing chronological cutoff for all custody illnesses, a finding that the patient in this page's hypothetical crossed a threshold at any stated hour, or a universal test for federal civil-rights liability. A timely decision before a later deterioration may remain causally relevant even if intervention at a later stage would have been less effective. A late omission may still cause separately proven pain or disability without proving death causation. (Grade: Bromme court-opinion reproduction; these scope limitations are analytical safeguards.)

Public-entity statutes that speak in causal terms

The Government Claims Act expresses public-entity liability in causal language, and each route has its own causal object.

• Vicarious liability for employees. "A public entity is liable for injury proximately caused by an act or omission of an employee of the public entity within the scope of his employment" if the act or omission would give rise to a cause of action against the employee (Gov. Code § 815.2(a)), and is not liable where the employee is immune (§ 815.2(b)). (Grade: Settled — statute text.)
• Independent contractors. "A public entity is liable for injury proximately caused by a tortious act or omission of an independent contractor of the public entity to the same extent that the public entity would be subject to such liability if it were a private person," but not where it would not have been liable had the act been that of an employee (Gov. Code § 815.4). (Grade: Settled — statute text; its application to a correctional-health contractor, and its interaction with the prisoner immunity, is addressed in Roadmap 086.)
• Prisoner immunity and its exceptions. A public entity is not liable for "An injury to any prisoner," subject to exceptions that include § 845.6; but "Nothing in this section exonerates a public employee from liability for injury proximately caused by his negligent or wrongful act or omission," and the entity must pay judgments against healing-arts practitioners for "malpractice arising from an act or omission in the scope of his employment" (Gov. Code § 844.6(a), (d)). (Grade: Settled — statute text.)
• Failure to summon medical care. "Neither a public entity nor a public employee is liable for injury proximately caused by the failure of the employee to furnish or obtain medical care for a prisoner in his custody," except that the employee and entity are liable "if the employee knows or has reason to know that the prisoner is in need of immediate medical care and he fails to take reasonable action to summon such medical care"; and nothing in the section exonerates a healing-arts practitioner from liability "for injury proximately caused by malpractice" (Gov. Code § 845.6). (Grade: Settled — statute text. California decisions construing the line between failing to summon care and furnishing deficient care, such as Castaneda v. Department of Corrections & Rehabilitation (2013) 212 Cal.App.4th 1051 (AR-054-C01, opened for the series) and Watson v. State of California (1993) 21 Cal.App.4th 836 (AR-051-C01), are addressed in Roadmaps 066 and 078.)

The causal object differs by route. Under § 845.6 the plaintiff must connect the injury to the failure to summon — the interval between when the employee knew or had reason to know of the need for immediate care and when care was summoned. Under § 844.6(d) and § 815.2 the object is the clinician's malpractice. In the hypothetical, a § 845.6 theory against the deputies focuses on the hours between the 01:52 intercom call (or the earliest moment the deputies had reason to know) and the 03:22 call to paramedics; a malpractice theory focuses on the 15:30 assessment and the omitted recheck. Each requires its own counterfactual (Analytical inference).

Custodial-medical counterpoint. In published Frausto v. Department of the California Highway Patrol, (Cal. Ct. App. 2020, No. A156552), the appellate court held that record-supported testimony about transporting a detainee for hospital observation and treating later toxicity could support causation despite an asserted refusal-of-treatment counterfactual. The case applied Bromme to the actual medical evidence, rather than treating a possible future refusal as conclusive. This opinion concerned its own custody, negligence and proof setting; do not cite it as itself establishing every element of Gov. Code § 845.6 or any other unlitigated statutory claim. The full opinion text inspected here was a judicial reproduction; the reporter pinpoint and complete subsequent history need confirmation before any filing. (Grade: Published California appellate reasoning; reproduction inspected.)

Survival, wrongful death and the death-causation nexus

A cause of action "is not lost by reason of the person's death, but survives subject to the applicable limitations period" (Code Civ. Proc. § 377.20(a)), and passes to the decedent's successor in interest or personal representative (§ 377.30, AR-0961-S06). In a state-law survival action the damages "are limited to the loss or damage that the decedent sustained or incurred before death" and "do not include damages for pain, suffering, or disfigurement," except in actions within a dated window in § 377.34(b) — as the text read this session states it, actions "filed on or after January 1, 2022, and before January 1, 2026," or granted a preference before January 1, 2022 (Code Civ. Proc. § 377.34, AR-065-S07; host shows the text as updated January 1, 2024). (Grade: Settled as to the text read; whether the window has been extended after the host's last update must be confirmed on the official host; Roadmap 065 tracks the legislative history.)

Temporal statutory caution (2026). The § 377.34(b) extended state-law survival pain-and-suffering window described above was tied to actions filed before January 1, 2026. For a newly filed 2026 state-law survival case, do not presume the former exception is still available; verify the operative statutory text, filing-date transitional rules and any amendment before asserting those damages. Any federal § 1983 analysis under Chaudhry/Valenzuela must be handled separately. This paragraph relies on the inherited Roadmap 076 source review and unofficial statutory reproductions; the California Legislature endpoint was not authenticated here.

The heirs' wrongful-death action is a claim "for the death of a person caused by the wrongful act or neglect of another" (Code Civ. Proc. § 377.60, AR-065-S08). Death causation is therefore an element of the heirs' action, not merely a measure of damages, and Bromme applies the reasonable-medical-probability rule to it. (Grade: Settled — statute text; Bromme Majority/likely.)

Federal law ties the measure of a § 1983 survival recovery to causation of death. The Ninth Circuit held that § 377.34's bar on pre-death pain and suffering "limits recovery too severely to be consistent with § 1983's deterrence policy," and that "Section 377.34 therefore does not apply to § 1983 claims where the decedent's death was caused" by the violation of federal law, because otherwise the law would be "making it more economically advantageous for a defendant to kill rather than injure his victim" (Chaudhry v. City of Los Angeles, No. 11-55820 (9th Cir. May 19, 2014), slip op. at 16–17). The court stressed that "the distinction between those violations of federal law that cause death and those that do not is crucial" (slip op. at 15). Valenzuela v. City of Anaheim, No. 20-55372 (9th Cir. Aug. 3, 2021), extended the reasoning: "Following Chaudhry, we therefore hold that § 377.34's prohibition of loss of life damages is inconsistent with § 1983," observing that "One can endure pain and suffering separately from dying, while another can die painlessly and instantly" (slip op. at 11). (Grade: Settled in the Ninth Circuit, conditioned on proof that the violation caused the death.) Roadmap 065 treats these actions in full; the point here is that in federal court the value of the estate's claim can turn on whether the constitutional violation caused the death, so the death-causation question is litigated even in cases pleaded as delay cases.

Death, function and comfort: the injuries causation must reach#

Every custody case should be analyzed as several injuries, each with its own causal proof, rather than as one. The law supports the separation explicitly. In Gibson, the county argued that its indifference did not cause the death because a fatal heart attack was unforeseeable; the court rejected the argument for two reasons. First, "Although the precise way in which Gibson died may not have been foreseeable," "the extreme stress on Gibson's system and the possibility that this stress would trigger a fatal reaction" "of some sort were foreseeable." Second, "Death was not the only injury Gibson suffered at the hands of the County. The likely result, a jury could find, was severe psychological and physiological distress," and a plaintiff "may recover from a municipality for far less severe injuries in a suit of this nature." (Grade: Settled in the Ninth Circuit on that record.)

Four injuries recur:

1. Death. The plaintiff must prove that, but for the conduct (federal) or with the conduct as a substantial factor (California), the patient more likely than not would have survived. Under Bromme, conduct after the "last point" at which survival was still more probable than not cannot be a cause of death. (Grade: Settled federal structure; California rule Majority/likely.)
2. A shortened life. A possible shortening of life is a research hypothesis, not a generally established, freestanding California loss-of-life expectancy cause of action or a workaround for Dumas and Bromme. An expert might be able to establish that specific conduct probably reduced the patient's actual survival time, but whether an identified shorter-life injury is legally cognizable and compensable for this claimant and this claim family depends on controlling law, the decedent's status, and the applicable survival or wrongful-death damages statute. Do not assign days/months or damages merely because statistical life expectancy was lower; require legally available relief and non-speculative, patient-specific proof. (Grade: Analytical inference and unresolved legal question.)
3. A lost interval of comfort. Hours or days of pain, vomiting, air hunger, fear and indignity that timely care would probably have relieved are a distinct injury. Colwell, Jett and Gibson treat suffering and lost function attributable to the delay as harm in themselves. The causal question is narrower and often easier: not whether the patient would have lived, but whether, more likely than not, timely care would have relieved this suffering during this interval. (Grade: Majority/likely as to the § 1983 harm requirement.) Its compensability, however, depends on who sues and where: a living plaintiff may recover it; a state-law survival action filed outside the § 377.34(b) window cannot recover the decedent's pain and suffering under the text read; a § 1983 survival action may recover it under Chaudhry where the violation caused the death. Whether Chaudhry's displacement of § 377.34 extends to a § 1983 survival claim in which the violation caused pre-death suffering but not the death is not answered by the opinions read: Chaudhry expressly tied its holding to deaths caused by the violation. (Grade: Unsettled; counsel question.)
4. A lost function. In the variant, the man survives dependent on dialysis. His kidney disease pre-existed custody, so the injury is the difference between the function he had and the function he has. California instructs that a plaintiff "is not entitled to damages for any physical or emotional condition" that pre-existed the defendant's conduct, but if a condition "was made worse by [name of defendant]'s wrongful conduct," the jury must award damages that "reasonably and fairly compensate" for "the effect on that condition" (CACI No. 3927 (2026 ed.)). The causal question is whether the conduct, more likely than not, converted chronic kidney disease into dialysis dependence — a question of nephrology and timing. (Grade: Settled as to the instruction's text.)

For federal suits by prisoners, one statutory limit interacts with this catalogue: "No Federal civil action may be brought by a prisoner confined in a jail, prison, or other correctional facility, for mental or emotional injury suffered while in custody without a prior showing of physical injury or the commission of a sexual act" (42 U.S.C. § 1997e(e), AR-096-F04). A "prisoner" includes "any person incarcerated or detained in any facility who is accused of, convicted of, sentenced for," or adjudicated delinquent for criminal violations (§ 1997e(h)). The lost-interval-of-comfort injury in a delay case is ordinarily physical — vomiting, pain, respiratory distress — and proof that the delay caused a physical injury is what the statute's "prior showing of physical injury" language looks to. (Grade: Settled — statute text; how much physical injury suffices, and the treatment of claims filed after release or by an estate, are counsel questions addressed in Roadmap 081.)

The practical lesson is to plead and prove causation injury by injury. A complaint that alleges only that the defendants "caused his death" stakes everything on the hardest proposition; a complaint that separately alleges, with a good-faith factual basis, the interval of avoidable suffering and any loss of function preserves the claims that survive a successful defense on death causation.

Proving causation from the record: timelines, vital signs, laboratory values, imaging and pathology#

Causation in custody cases is proven, or defeated, by reconstruction. This section describes method; its propositions are Analytical inference except where an authority is cited. The method is chronological and physiological: fix the clinical state of the patient at each moment someone could have acted, ask what the indicated response was at that moment, and ask what that response would probably have achieved given the disease's course. The records supply the fixed points; the expert supplies the physiology between them.

The time-stamped chronology. Build a single timeline that merges every source by clock time: the booking record; the intake screening; the medication administration record; sick-call requests with their receipt stamps; nursing notes and the time each was created (not merely the time it describes); telephone orders and their transcription; housing logs and welfare-check entries; intercom and man-down logs; video; the paramedic run report's dispatch, arrival and transport times; the emergency department triage time; and the first hospital laboratory results. Electronic health records carry audit trails that show when each entry was created, modified and viewed; a note describing a 20:10 refusal that was created at 04:30 the next morning is a different piece of evidence from one created at 20:12. Clocks in different systems drift; the timeline should record each source's clock and any correction applied (Analytical inference; Roadmaps 083 and 084 address obtaining audit trails).

Vital signs and trajectory. A single abnormal value rarely proves causation; a trajectory often does. In the hypothetical, the 15:30 pulse of 118, blood pressure of 98/60 and respiratory rate of 24, with a glucose of 412 and vomiting, describe a patient who is volume-depleted and possibly acidotic; the arrival values at the hospital describe the same process eleven hours further along. The expert's task is to place the patient on the disease's curve at each point — what his pH and potassium probably were at 15:30, at 19:30 when the recheck was due, at 01:52 and at 03:10 — and to state what treatment begun at each point would probably have achieved. The absence of a measurement where one was ordered is itself evidence: the recheck that was not done is the measurement the defense cannot use to show he was stable (Analytical inference).

Laboratory values as fixed points. The first hospital laboratory panel is the most important single causation document in many custody cases, because it fixes the patient's state at a known time by objective measurement. Back-extrapolation from that point to earlier times is legitimate expert work if it rests on known rates of change and is honest about their ranges; it risks exclusion as speculation under Sargon and Fed. R. Evid. 702 when it assumes a linear course the disease does not follow or ignores intervening events such as vomiting, aspiration or missed insulin (see the next section). A baseline value from before custody — here, a creatinine of 1.9 from a clinic record — is what allows the expert to separate acute injury from pre-existing disease.

Imaging. Radiographs and scans fix anatomical facts at a time: an infiltrate that was present on arrival was acquired before arrival; a fracture's callus, an abscess's wall or a hemorrhage's density can bound when the process began. Imaging is also where the defense finds alternative causes, and both sides should have a radiologist read the studies rather than rely on the clinical report.

Pathology and the coroner's file. The coroner has a statutory duty "to inquire into and determine the circumstances, manner, and cause" of the deaths the statute lists, which include "deaths in prison or while under sentence" and deaths "under circumstances that afford a reasonable ground to suspect" that the death was caused by the criminal act of another, among others (Gov. Code § 27491(a); whether a particular jail death falls in a listed category is a matter for the coroner and counsel). The autopsy report, toxicology, histology and the investigator's narrative are primary causation evidence. Three cautions apply. First, the death certificate's cause-of-death statement is an opinion formed for public-health and vital-records purposes; it is evidence, not a legal finding of causation, and the pathologist's chain — immediate cause, conditions leading to it, other significant conditions — must be translated into the legal question of what would have happened with timely care. Second, "manner: natural" describes the disease process; it does not decide whether a delay in treating a natural disease caused death, and neither side should argue that it does. Third, tissue blocks and slides permit re-examination: histology can sometimes age an infarct, a pneumonia or an inflammatory process, which can show whether a process began before, during or after the interval of alleged inattention (Analytical inference; preservation is addressed below).

Custody records and video. Welfare-check logs record that a check occurred; video shows what the check consisted of. Where the theory is that a patient's deterioration was observable, the video is the best evidence of what was observable and when. Intercom logs and their audio, if retained, fix when the patient or a cellmate asked for help. These records belong to the jail and are obtained through preservation demands and discovery, never by access to the jail's systems (records key K, D, X below).

The defense's use of the same records. Every record that fixes a point for the plaintiff fixes it for the defense. The defense will use the same timeline to argue that the patient was already beyond the "last point" when the omission occurred, that a documented refusal broke the chain, that the hospital's later course was the cause, or that the pre-existing disease explains the outcome. A causation analysis that has not been run from the defense's side is incomplete (Roadmap 133).

The expert's counterfactual and the gatekeeper#

Causation in medical cases is almost always proven by expert opinion, and both court systems now scrutinize the reasoning that connects the expert's data to the expert's conclusion. Roadmap 074 addresses expert qualification, the standard of care and disclosure; this section addresses only the causation opinion.

California. An expert may give an opinion "Related to a subject that is sufficiently beyond common experience that the opinion of an expert would assist the trier of fact," based on matter "that is of a type that reasonably may be relied upon by an expert in forming an opinion upon the subject to which his testimony relates" (Evid. Code § 801). The trial court "acts as a gatekeeper to exclude speculative or irrelevant expert opinion"; "the matter relied on must provide a reasonable basis for the particular opinion offered"; "an expert opinion based on speculation or conjecture is inadmissible"; and "A court may conclude that there is simply too great an analytical gap between the data and the opinion proffered" — but "The court does not resolve scientific controversies" and must not weigh the opinion's probative value (Sargon Enterprises, Inc. v. University of Southern California (2012) 55 Cal.4th 747, slip op. at 25–29). (Grade: Settled.) Saelzler adds that an expert opinion "resting solely on speculation and surmise" does not create a triable issue of causation (25 Cal.4th at 775). (Grade: Settled.)

Federal court. An expert may testify "if the proponent demonstrates to the court that it is more likely than not that" the testimony will help the trier of fact, is "based on sufficient facts or data," is "the product of reliable principles and methods," and "the expert's opinion reflects a reliable application of the principles and methods to the facts of the case" (Fed. R. Evid. 702, as amended 2023). The 2023 Advisory Committee Note, read here in a clearly labeled reproduction, clarifies that sufficient basis and reliable application are admissibility questions under Rule 104(a), while some disputes about otherwise reliable testimony remain for the factfinder. The more-likely-than-not admissibility threshold for the proponent's showing to the judge does not itself establish the medical-causation merits claim and does not excuse connecting methods to the particular opinion. An official U.S. Courts historical-rules landing page was located, but the signed current rule PDF was not authenticated in this run. (Grade: Settled as to rule text; the committee note's summary is description level.)

What a defensible causation opinion contains. The following structure is an analytical synthesis of these rules, offered so that a reader can recognize a strong opinion and a weak one (Analytical inference):

1. The indicated measure at each decision point. What a timely response would have been at 15:30, at the due recheck, at 01:52 — stated as specific actions (point-of-care ketone testing; provider evaluation; transfer to an emergency department), not as "appropriate care."
2. The time to effect. How long the indicated measure would have taken to reach the patient — transport, triage, treatment — using the jail's actual geography and the actual run times in the record where available.
3. The physiology. Where the patient probably was on the disease's course at each point, with the basis: the measured values, the known natural history, published rates of change, and the patient's own baseline.
4. The probable outcome with timely care. The opinion must reach "more likely than not," not "could have," "might have," or "a significant chance." In the particular medical-negligence setting addressed by Jones and Bromme, a finding that proper care left no greater-than-even probability of survival may defeat a California death-causation theory; that is not an automatic numerical shortcut for each federal § 1983 cause, for independent concurrently sufficient causes, or for injury short of death. State the governing claim-specific test and explain the causal counterfactual from patient-specific evidence. In Hernandez (2024 unpublished memorandum) the majority required the proffered expert record to connect investigation, diagnosis, treatability and likely avoidance of death; it did not impose a universal cancer-style percentage on every federal claim.
5. Alternative causes excluded or apportioned. A defensible differential analysis identifies plausible material alternatives — pre-existing disease, alcohol withdrawal, aspiration and later hospital care — and provides a reasoned explanation of their contributions or why the asserted defendant-caused link remains more probable. Jones v. Ortho warns that a mere possibility is insufficient; it does not demand experimentally eliminating every imaginable co-cause. Under Rule 702 the proponent must show a reliable factual basis and application for each specific opinion, and the competing assumptions and attribution boundaries should be exposed for adversarial testing.
6. Injury-by-injury conclusions. Separate opinions on death, on any shortened life (if legally cognizable), on the interval of suffering, and on any lost function, so that the failure of one does not take the others with it.

1. The missed-diagnosis chain. If the theory is that investigating an earlier warning sign would have prevented death, show which test or examination would probably have occurred; what clinically actionable finding it probably would have detected; which treatment was realistically available and timely; and why that treatment probably would have changed the relevant outcome. Identify each missing link. This is an analytical counterfactual checklist grounded in the majority's identified evidentiary gaps in Hernandez (2024, expressly nonprecedential), not a mandatory four-element constitutional test.

Percentages and probabilities. Survival statistics from the literature describe populations, not the patient. An expert who testifies that "patients presenting with this pH have a 70 percent survival rate with prompt treatment" has supplied a starting point, not an answer; the opinion must then explain why this patient, with his comorbidities, belonged to the survivors more likely than not. Conversely, a defense expert who cites a population mortality figure for severe diabetic ketoacidosis has not shown that this patient would have died. Bromme's 70–75 percent and 35–40 percent figures illustrate how the same evidence can establish causation for one window of time and defeat it for a later one (Analytical inference).

The same gate for the defense. Sargon and Rule 702 apply to defense experts. A defense opinion that the patient "would have died regardless" must rest on the same kind of reasoning — the patient's state at each point, the probable effect of the indicated measures — and is equally vulnerable if it rests on assumption.

Competing causes: pre-existing disease, the patient's own conduct, other actors and the county–contractor seam#

Concurrent causes. A defendant whose negligence was a substantial factor is responsible even though other causes contributed: "A person's negligence may combine with another factor to cause harm," and the defendant "cannot avoid responsibility just because some other person, condition, or event was also a substantial factor in causing [name of plaintiff]'s harm" (CACI No. 431 (2026 ed.)). Where two causes concur and either alone would have been sufficient, the but-for test is not used to exonerate either; Mitchell explained that "one cannot escape responsibility for his negligence on the ground that identical harm would have occurred without it" in that setting (54 Cal.3d at 1049, quoting Vecchione v. Carlin), and the Directions for Use to CACI No. 430 omit the but-for sentence for concurrent independent causes. (Grade: Settled.) In custody cases the problem arises when each of two defendants says that its own omission made no difference because the other's omission would have produced the same outcome anyway — the clinician says that even a timely transfer order would have stalled in the custody transport process, and the custody side says that even a timely summons would have reached a patient no clinician had evaluated. For a California negligence claim, the independently sufficient concurrent-cause qualification may prevent two true causes from each defeating liability by invoking the other. For a federal § 1983 claim, do not automatically substitute CACI 430/431 for federal causation and the Ninth Circuit's actual/proximate-cause analysis; identify the particular authority for any multiple-sufficient-causes instruction. Judge Mendoza's unpublished Hernandez partial dissent discussed substantial-factor reasoning, but it is not the majority's holding or binding circuit rule. Establish each defendant's actual causal role on the evidence, then brief the precise multiple-causation legal theory separately. (Grade: California rule supported by Mitchell; federal-application limitation is an explicit unresolved question.)

Superseding causes. A later act breaks the chain only in narrow circumstances. Under California's pattern instruction, a defendant claiming that a third party's later conduct was a superseding cause must prove that the conduct occurred after the defendant's; "That a reasonable person would consider [name of third party]'s conduct a highly unusual or an extraordinary response to the situation"; that the defendant "did not know and had no reason to expect" the third party to act negligently; and "That the kind of harm resulting from [name of third party]'s conduct was different from the kind of harm that could have been reasonably expected from [name of defendant]'s conduct" (CACI No. 432 (rev. Dec. 2011)). The Directions for Use, as summarized on the host, state that superseding cause is an affirmative defense and that the instruction should not be given where, as a matter of law, a party is liable for subsequent negligence, such as subsequent medical negligence. (Grade: Settled as to the instruction's text and directions.) Federal law reaches the same place through Conn: foreseeable intervening causes do not supersede. (Grade: Settled in the Ninth Circuit.)

The point recurs in custody deaths. When a patient is transferred late and then receives imperfect hospital care, the hospital's later negligence is the kind of risk a delay in transfer creates, and California's directions treat subsequent medical negligence as ordinarily not superseding (Analytical inference from CACI No. 432's directions; the underlying decisional law was not opened). The hospital's conduct may still matter: it may be a concurrent cause, it may reduce the share of non-economic damages a jail defendant bears under comparative-fault principles, and it may defeat death causation if the evidence shows the patient would probably have survived the jail delay but for the hospital's error. The defense must prove it as a cause, not merely point to it.

The patient's own conduct. Refusals, nonadherence and substance use are the defense's most frequent alternative causes. Three questions organize the analysis (Analytical inference, drawing on Roadmaps 043 and 072): Was the refusal informed — was the patient told what was being offered and why, and did he have the capacity to refuse while vomiting and possibly acidotic? What did the refusal cover — a fingerstick at 20:10 is not a refusal of transfer at 01:52? And was the refusal a superseding cause, or a foreseeable feature of the very condition that required care — confusion and vomiting can be symptoms of disease? Frausto (published Cal. Ct. App. 2020) supplies a useful fact-sensitive comparison: potential refusal at one time did not end the inquiry where medically appropriate hospital observation could lead to treatment after condition or decisional capacity changed. It neither proves that this hypothetical patient would have consented nor authorizes treatment without a valid basis; capacity, applicable consent law and realistic treatment time must be established. In a California negligence action the patient's own negligence is assessed under comparative-fault principles (description level), and in an action "for personal injury, property damage, or wrongful death, based upon principles of comparative fault, the liability of each defendant for non-economic damages shall be several only and shall not be joint" (Civ. Code § 1431.2(a)). (Grade: Settled — statute text; its application to particular defendants and to federal claims is a counsel question; Roadmap 086 addresses allocation.)

Pre-existing disease and the eggshell rule. A tortfeasor takes the plaintiff as it finds him. California instructs that the jury "must decide the full amount of money that will reasonably and fairly compensate [name of plaintiff] for all damages caused by the wrongful conduct of [name of defendant], even if [name of plaintiff] was more susceptible to injury than a normally healthy person would have been, and even if a normally healthy person would not have suffered similar injury" (CACI No. 3928 (2026 ed.)). The Ninth Circuit applied the principle to a custody death in Gibson, invoking, from Wakefield v. NLRB (not opened), the "time-honored legal principle that a wrongdoer takes his victim as he finds him": "Sometimes referred to as the 'eggshell skull' doctrine, this principle renders defendants liable for any physical injury they cause, no matter how unforeseeable, once they inflict harm on a plaintiff's body," so that if the county was liable for the other injuries "it also must bear liability for Gibson's death." (Grade: Settled.) The eggshell rule is not a causation shortcut. It answers the defense argument that a frail patient's death was unforeseeable; it does not relieve the plaintiff of proving that the conduct caused the injury, and it is paired with the aggravation rule (CACI No. 3927), which limits recovery to the worsening the conduct caused (Analytical inference).

The county–contractor seam. When the county and a contractor each act — the contractor's nurses assess and the county's deputies observe — causation must be traced separately along each line, because the legal routes differ (Roadmap 086). Under § 1983 each entity answers only for its own policy's causal contribution (Monell; Tsao). Under California law the county's liability may run through § 815.2 for its employees, through § 815.4 for a contractor's torts "to the same extent" it would be liable as a private person but subject to the Act's immunities, through § 844.6(d) for malpractice by public-employee practitioners, and through § 845.6 for a failure to summon; the contractor's liability runs through ordinary respondeat superior and professional-negligence law. A gap in causation along one line — for example, proof that the deputies could not reasonably have recognized a medical emergency before 03:10 — does not close the other line, and the converse is also true. A causation chart with one column for each defendant and one row for each injury is the discipline that keeps the lines apart (Analytical inference).

Applying the law to the hypothetical#

Nothing in this section states what any record would show or what any expert would conclude. It identifies the questions.

The decision points. The chronology yields at least five candidate causal acts or omissions: (1) the missed and "refused" insulin doses on Day 2; (2) the 15:30 assessment that attributed vomiting, tachycardia and a glucose of 412 to withdrawal, without ketone testing or provider evaluation; (3) the on-call physician's order to recheck in four hours, given by telephone on the reported values; (4) the omitted recheck and the unexplored 20:10 "refusal"; and (5) the overnight interval — the brief welfare checks, the 01:52 intercom call logged "no emergency stated," and the period between the 03:10 man-down call and the 03:22 call to paramedics. Each is attributable to different people and, potentially, to different entity policies.

Death causation. The central question is where the Bromme "last point" falls. If the experts agree that, had the man been sent to an emergency department after the 15:30 assessment, he would more likely than not have survived, then omissions (2) through (4) are candidate causes of death and the case turns on culpability and on the defense's alternative causes. If the evidence shows that by 01:52 his acidosis and aspiration had already made death more likely than not, omission (5) cannot be a cause of death under California law, and under § 1983 the but-for test would ordinarily produce the same result, however the overnight checks are characterized (Analytical inference). The aspiration matters to timing: if it occurred during overnight vomiting, the delay may have caused the pneumonia that led to septic shock, which links omission (5) to death through a foreseeable mechanism; if the radiographic and pathologic evidence shows it occurred earlier, it may support the defense on the overnight interval.

The lost interval. Even if death causation fails for some defendants, the hours of vomiting, abdominal pain and respiratory distress between the assessment and the hospital are a separate injury. The question for each defendant is whether timely action would probably have relieved them. For the estate, the compensability of that interval depends on the forum and the claim: under the § 377.34 text read, a state-law survival action filed after the window closed would not recover the decedent's pain and suffering; a § 1983 survival claim may recover it under Chaudhry if the violation caused the death; whether Chaudhry's rule reaches a § 1983 claim proving only the interval is unsettled.

Individual defendants. For the nurse, the counterfactual is what a reasonable response to the 15:30 findings would have been and what it would have achieved; under Gordon, causation is a separate element from the objective unreasonableness of her decision. For the physician, Leer's individualized inquiry asks what information reached him and what his order caused; an order to recheck in four hours may be defended as a reasonable plan on reported values, while the failure to follow up may be attributed to the system that should have tracked it. For the deputies, Lemire and Conn frame the question: whether a timely summons would probably have changed the outcome, and whether the earlier omissions were set in motion in a way that made later evaluations "of little value."

Entity defendants. For the contractor, a Monell theory would identify a policy or practice — for example, a protocol lacking glucose thresholds for provider evaluation, verbal orders without a tracking mechanism, or a practice of attributing symptoms to withdrawal — and then ask Canton's question: would the injury have been avoided under a policy not deficient in that respect? For the county, the question is the same for its welfare-check and intercom practices, with Castro as the closest structural analogue. Under Brown, a facially lawful policy requires the most rigorous causal showing.

Competing causes. The defense will cite the chronic kidney disease, the cardiovascular disease, the alcohol use, the 20:10 refusal and the delayed antibiotics. Each is analyzed under the rules above: the pre-existing disease under the eggshell and aggravation instructions; the refusal under the three questions on informed refusal, scope and foreseeability; the antibiotics as subsequent medical negligence, ordinarily not superseding but potentially a concurrent cause or an argument against death causation.

The variant. If the man survives on dialysis, the injury is the aggravation of pre-existing kidney disease. The nephrology question is whether timely treatment of ketoacidosis and volume depletion would probably have prevented the conversion from chronic disease to dialysis dependence.

A step-by-step approach#

1. Preserve before analyzing. Send preservation demands for video, intercom audio, housing logs, electronic-record audit trails, glucometer and device memory, and laboratory specimens; ask the coroner about retention of tissue blocks, slides and toxicology samples (Roadmap 007; Model 132).
2. Obtain the records lawfully. The patient's or personal representative's request for medical records (Health & Saf. Code § 123110); hospital and EMS records; the coroner's file as available; public records of the county's contract (Roadmaps 083, 087).
3. Build the merged timeline to the minute, with each source's clock identified, and mark each moment at which someone could have acted (Worksheets 100, 109, 111).
4. Identify every injury separately: death; any shortened life; each interval of avoidable suffering; each loss of function. Record the patient's pre-custody baseline for each.
5. For each injury and each defendant, state the counterfactual: the indicated measure, the time to effect, the probable outcome. Leave a column for the strongest defense answer.
6. Retain the right experts — the treating specialty (here, endocrinology or critical care; for the variant, nephrology), correctional medicine for the standard and the system, and forensic pathology for the autopsy — and ask each for injury-by-injury opinions to a reasonable medical probability (Roadmap 074).
7. Locate the "last point" for death causation, and test every candidate omission against it.
8. Map each causal link to the correct legal route: individual § 1983 (personal participation, setting in motion, integral participation, supervisory causation); entity § 1983 (moving force); professional negligence; § 845.6; § 815.2/§ 815.4/§ 844.6(d) for the county; wrongful death and survival.
9. Plead causation only as the evidence supports it. Do not allege a fact unless you have a good-faith factual basis for it. Plead the separate injuries separately (Roadmaps 129.1, 130; Fed. R. Civ. P. 11, AR-0961-F02; Code Civ. Proc. § 128.7, AR-0961-S04).
10. Run the defense case on the same timeline before filing and again after expert disclosure (Roadmap 133).
11. Check the bankruptcy gate before naming a potentially involved Wellpath/CFMG entity; use independently authenticated debtor records and the bankruptcy research materials, not held legacy 090/091 numbers as an authoritative cross-reference.

Elements of the claim#

Causation appears in each claim family as follows. The elements are stated in summary; Roadmaps 042, 043, 047, 065, 066 and 078 state them in full, and the element tables are in 096.3. Do not allege a fact unless you have a good-faith factual basis for it.

Potentially relevant defendants#

Defendants are identified by role and function, and only where the evidence connects that person's or entity's own conduct to an injury. Intake and line nurses — for assessments, escalation decisions and medication administration. On-call and attending physicians or mid-level practitioners — for orders given, including telephone orders on reported values, and for follow-up. Medication-pass staff — for documented refusals and missed doses. Deputies and custody supervisors — for welfare checks, responses to intercom and man-down calls, and the decision to summon care (§ 845.6). Medical directors and supervisors — only for their own conduct in policy, training or supervision with a causal connection (Starr; Lemire). The correctional-health contractor — for its own policies under § 1983 (Tsao) and vicariously for its employees' negligence under state law. The county — for its own policies under § 1983, and under the Government Claims Act's routes. Hospitals and outside clinicians — not usually defendants in a custody case, but their conduct may be a concurrent cause, may affect apportionment, and may be offered by the defense as an intervening cause. Liability is never inferred from a logo, a uniform or the name on a form; entity identity is established from records (Roadmaps 003, 004, 094; Worksheet 101).

Administrative prerequisites#

Causation does not have its own prerequisites, but the claims that carry it do. State-law damages claims against a public entity or its employees require a written claim presented under the Government Claims Act before suit (Gov. Code §§ 910, 911.2, 945.4; AR-131-S01, AR-096-S01, AR-096-S02; Roadmaps 078, 131); the requirement does not apply to a § 1983 claim (Williams v. Horvath (1976) 16 Cal.3d 834, AR-C08). A professional-negligence action against a health-care provider requires the notice of intention under Code Civ. Proc. § 364 (AR-096-S04; Roadmap 066). A prisoner's federal action requires exhaustion of available administrative remedies (42 U.S.C. § 1997e(a), AR-096-F04; Ross v. Blake, 578 U.S. 632 (2016), AR-0961-C09; Roadmap 080); whether it applies turns on whether the plaintiff is a "prisoner" as § 1997e(h) defines the term when suit is brought, a question for counsel where the patient has been released or has died. A government claim should describe each injury the claimant intends to pursue, including any interval of suffering and any loss of function as well as the death, because a claim's description may later be compared with the complaint's theories (Analytical inference; counsel question; Roadmap 131). Before initiating proceedings against a potentially involved Wellpath entity, obtain authenticated entity- and debtor-specific bankruptcy status; legacy 090/091 references remain on hold until body-level mapping.

Limitation periods#

Causation evidence can affect the trigger: when an injury occurred, and when it was or should have been discovered, are themselves causation-adjacent facts that the timeline establishes. This page computes nothing; Roadmaps 008, 078 and 082 explain how the periods interact.

Evidence and records to obtain#

Records key: H — presently has lawfully; R — statutory request (for example, a patient's or personal representative's request under Health & Saf. Code § 123110); D — discovery or subpoena only; P — potentially privileged or private (Evid. Code § 1157 peer review; other patients' records; attorney communications); K — someone else must preserve but need not produce voluntarily (Roadmap 007); X — must not access, copy or remove.

Favorable and adverse facts#

Facts that tend to support causation: objective values at the decision point that place the patient early on a treatable course (a measured glucose with a normal mental status; a recorded blood pressure before collapse); a documented order that was not carried out, so that the omitted act is precisely identified; a short and known time-to-treatment from the facility to an emergency department; a first hospital panel or imaging study showing a process that was recent and progressive; expert literature showing high survival or recovery with timely treatment at that stage; a baseline record showing better function before custody; video showing visible deterioration; a pathology finding that ages the fatal process to within the interval of inattention.

Facts that tend to defeat causation: a disease course that was already irreversible at the first decision point; a fulminant process (a massive pulmonary embolism, a ruptured aneurysm, an arrhythmia) for which no timely response would probably have changed the outcome; an informed refusal that covered the specific measure at issue; strong evidence that the injury arose from an unrelated later event; a hospital course with an independent error that alone accounts for the outcome; no baseline record, so that pre-existing and acute injury cannot be separated; expert opinions framed in possibilities ("could," "might," "a chance") rather than probabilities.

Facts that cut both ways: a documented refusal (consent, capacity and scope must be examined); a manner of death of "natural" (it describes the disease, not the delay); repeated clinical contacts (they show notice and opportunity, but also show assessment); an alcohol-withdrawal protocol (it shows a risk recognized, and may also show that symptoms of another illness were attributed to it).

Likely defenses#

The defense playbook (Roadmap 133, "No causation (medical)," "Expert failure" and the Monell entries) sets out each defense neutrally. On causation the principal defenses are:

• No harm from delay; the outcome was the same. The disease would have produced the same injury with timely care (Shapley; Wood; Hallett). The answer is a counterfactual opinion grounded in the timeline.
• The "last point" had passed. For death causation, the defendant acted after survival had become improbable (Bromme). The answer may be an earlier decision point attributable to the same defendant, or a different injury (suffering, function) that the later omission did cause.
• Speculative expert testimony. The opinion rests on possibilities, on statistics not applied to the patient, or on an analytical gap (Sargon; Saelzler; Fed. R. Evid. 702).
• No individualized causation. The plaintiff attributes a whole shift's or a whole system's conduct to each defendant (Leer; Iqbal). The answer is defendant-by-defendant proof, or integral participation or setting-in-motion where the facts support it.
• No moving force. The injury resulted from an employee's departure from an adequate policy, not from the policy (Canton; Brown). The answer is the Canton counterfactual on a specified deficiency.
• Superseding cause. The patient's refusal, his own substance use, a cellmate's act, or the hospital's care broke the chain (CACI No. 432; Conn). The answer is foreseeability, and the rule on subsequent medical negligence.
• Pre-existing disease. The patient's comorbidities explain the outcome. The answer is the eggshell and aggravation rules, and expert separation of acute from chronic injury (CACI Nos. 3927, 3928; Gibson).
• § 845.6's narrow scope. For custody staff, liability is limited to failure to summon immediate care; the injury must be traced to that failure. Roadmap 078.
• Damages-side limits that depend on causation. § 377.34 (and the conditional nature of Chaudhry and Valenzuela); § 1997e(e); MICRA (Civ. Code § 3333.2, AR-0961-S03); several liability for non-economic damages (Civ. Code § 1431.2).

The deep companions to Roadmap 133 for these defenses are Playbooks 138 (causation, damages and mitigation) and 142 (moving-force causation).

Causation#

This page is the causation page; this section compresses it into the chain each claim must prove.

The chain. Specific actor or entity policy → specific act or omission at a specific time → the indicated measure that was not taken → what that measure would probably have achieved, given the disease's course → the specific injury (death; shortened life; interval of suffering; lost function) → within the scope of the risk the conduct created, with no superseding cause.

The burdens. The plaintiff carries the burden of proving causation on every claim, by a preponderance in federal court and to a reasonable medical probability in California medical cases (Jones v. Ortho; Bromme). California's CACI No. 432 addresses the defendant's asserted intervening/superseding cause, while comparative fault involves its own pleaded defense and allocation questions; a precise party-by-party burden instruction must be checked against the actual claims and current 2026 instructions, rather than inferred for every federal or California theory from the pattern-instruction title. No authority opened for this page shifts the causation burden in a medical case (Rutherford declined to shift it in asbestos cases). Entity causation under § 1983 is held to "rigorous standards" (Brown).

The distinctions to keep. Cause in fact and proximate cause (Lemire; Conn; Mendez). Individual and entity causation (Leer; Canton). Causing death and causing suffering or lost function (Gibson; Colwell; Bromme). What a jury could find at summary judgment and what a plaintiff must prove at trial (Lemire; Gibson; Castro). Lost chance, which California does not compensate (Dumas; Bromme), and a probable loss of a definite interval, which is an injury to be proven like any other (Analytical inference).

Damages and remedies#

Causation determines which damages are available, because damages follow the injury proven (matrix 096.2; Roadmap 076). If the statutory wrongful-death claim's death-causation element is proven, eligible heirs may pursue that claim's supported damages; a distinct § 1983 survival theory may implicate Chaudhry and Valenzuela only after checking whose constitutional right was violated, the effect of that violation on death, the cause of action, the operative state statute and subsequent history. If death causation is not established, wrongful-death recovery on that theory fails, but separately caused pre-death harms still merit analysis under the proper plaintiff, remedy and survival rules. The unpublished Hernandez memorandum is a directly inspected illustration of the distinction, not a binding expansion of Chaudhry or a categorical damages entitlement. A state-law survival claim recovers the decedent's pre-death economic loss and, within § 377.34(b)'s dated window as read, pain and suffering (Roadmap 065). A living plaintiff recovers for the proven aggravation of pre-existing conditions (CACI No. 3927) and for the proven interval of suffering, subject in federal court to § 1997e(e)'s physical-injury requirement for prisoners. In professional-negligence claims against health-care providers, non-economic damages are subject to Civ. Code § 3333.2 as amended (AR-0961-S03). In California comparative-fault actions, liability for non-economic damages is several, in proportion to fault (Civ. Code § 1431.2), which makes the identification of concurrent causes a damages question as well as a liability one; whether and how that rule interacts with federal claims tried together is a counsel question. Attorney's fees for prevailing § 1983 plaintiffs are governed by 42 U.S.C. § 1988(b) (AR-S922) and, for prisoners, by the PLRA's limits (Roadmap 081).

Discovery#

Causation discovery targets the fixed points and the alternative causes (Roadmap 084; for the general method, Roadmap 038). Requests should seek the medical record as maintained, with its audit trail; device and laboratory data with timestamps; the telephone-order log; the video and audio for the relevant interval; the welfare-check and intercom logs; the EMS and hospital records; the coroner's complete file, including photographs, histology and toxicology; and the protocols in force on the dates in question, with version histories. Depositions should fix, for each witness, what the witness observed and when, what the witness did, and what the witness understood the next step to be. Treating hospital physicians are often the most credible causation witnesses because they recorded the patient's state on arrival without regard to litigation; their depositions should fix the arrival findings and their own clinical understanding of how long the process had been under way. Expert disclosure (Code Civ. Proc. § 2034.210 et seq.; Fed. R. Civ. P. 26(a)(2); not opened) is where the causation opinions are tested, and the Sargon or Rule 702 motion is where weak ones end. Peer-review and quality-committee materials are generally protected (Evid. Code § 1157, AR-032-S04; Roadmap 085), but the facts they discuss are not, and the same facts can be obtained from the chart, the logs and the witnesses. Lost electronically stored information is addressed in federal court by Fed. R. Civ. P. 37(e) (AR-S909) and in state court by the doctrines Roadmap 007 describes. A remedy for lost evidence may cure prejudice or, on the required findings, permit an inference about what was lost; it is not itself proof of medical causation, and the expert must still connect the omission to the injury from the evidence that remains (Analytical inference).

CFMG/Wellpath-specific relevance#

Why this may matter in a CFMG/Wellpath setting. Public records describe a model in which California counties contract with private correctional-health providers for jail medical care, so that the nurses and physicians in the chart and the deputies in the housing log may work for different organizations; causation must be traced separately along each line, and the causal routes differ by defendant (Roadmap 086). Entity precision is essential, but the alleged inclusion or exclusion of any particular CFMG or Wellpath entity in a Chapter 11 debtor schedule, and any specific case number or bankruptcy effect, is an unverified research lead here, not an authenticated fact. Obtain and inspect the signed court/claims-agent debtor list, petitions, operative orders and exact entity names before making case-specific assertions or filing claims. Bankruptcy research and entity-specific counsel review remain a separate gate; the legacy Roadmap 090/091 references are under a numbering hold and do not themselves resolve debtor identity. The county's contract, its amendments and exhibits, and any staffing or performance terms are public records that identify which entity was responsible for which function on the dates in question (Roadmaps 086, 087), and those records — not a logo on a form or a name on a badge — are what connect a particular entity's policy to a particular causal link. Liability is never inferred from branding. Nothing here states that any entity caused any injury or death.

Primary authorities#

Related roadmaps#

Verified-by-title companions include emergency clinical care, custody record preservation, expert medical proof, Government Claims Act presentment, qualified immunity and damages. Legacy cross-reference candidates only, not canonically resolved: 007, 008, 040 [locked pilot—do not alter], 041–053, 059–060, 064–066, 072, 074, 076–087, 090–091, 096.2–096.3, 129.1, 130–133. The 079–099 and 100–124 namespace holds remain active; 090/091 omission from a newer index is not proof of a collision.

Companion worksheet#

Worksheet 109 (custody, medical, medication, referral, grievance and emergency records) for gathering the records that fix the timeline; Worksheet 100 (chronology) for the merged, minute-by-minute timeline with each source's clock identified; Worksheet 111 (death in custody) for the coroner's file and the separation of wrongful-death and survival injuries; Worksheet 114 (preservation and records distinction) for the H/R/D/P/K/X key; and Worksheet 112 (damages and mitigation) for tying each proven injury to its measure. A provisional, title-based companion is the Clinical-Course and Causation Timeline Worksheet (legacy label “Worksheet 119”; not verified as canonical because 100–124 is held), which can carry a causation matrix with one row for each injury (death; shortened life; each interval of suffering; each lost function), one column for each defendant and legal route, and cells recording the decision point, the indicated measure, the time to effect, the probable outcome with its expert basis, the "last point" for death causation, and the strongest defense answer.

What this page cannot do#

It cannot determine whether any act, omission, delay or policy caused any injury or death; that determination depends on the full record, qualified expert opinion and a court's or jury's findings. It cannot supply or evaluate an expert opinion, predict how a judge will rule on a Sargon or Rule 702 motion, or say what any coroner, hospital or jail record contains. It does not state any limitation date or decide whether any claim is timely. It does not resolve the open questions it identifies — the formulation of the harm requirement in delay cases, the reach of Chaudhry where a violation caused suffering but not death, the treatment of a probable loss of a definite period of life, and the current text of § 377.34 — each of which is for counsel. It is legal education, not legal advice, and it is no substitute for a lawyer who knows the facts. This is a private, unmerged research candidate; official statute checks, comprehensive negative case treatment, primary Wellpath bankruptcy evidence, contextual privacy/editorial clearance and independent lawyer/human approval remain unfulfilled, separately tracked gates. No published Roadmap or locked pilot was altered.