Suicide Not a Per Se Superseding Cause in WPLA Product-Seller Negligence Claims (Scott v. Amazon.com, Inc.)

Supreme Court of Washington (En Banc) — Filed February 19, 2026 — No. 103730-9

1. Introduction

Scott v. Amazon.com, Inc. arises from two consolidated suits brought by the families and estates of four young people (Mikael Scott, Tyler Muhleman, Demetrios Viglis, and Ava Passannanti) who died by suicide after ingesting high-purity sodium nitrite purchased through Amazon.com. The plaintiffs alleged Amazon sold and promoted sodium nitrite (an industrial/laboratory-grade chemical with no legitimate household use when sold at 98–99.6% purity), failed to provide adequate warnings, lacked age-gating or purchase controls, and—critically—used recommendation features and marketing prompts that paired sodium nitrite with other items allegedly associated with suicide (e.g., Tagamet, scales, and The Peaceful Pill Handbook), while removing reviews warning of suicide-related misuse.

Procedurally, the case came to the Supreme Court on review of a Court of Appeals decision that reversed the trial court and held the plaintiffs’ claims were barred at the pleading stage because suicide is a superseding cause as a matter of law. The key issues were:

  • Issue 1: Whether suicide is, as a matter of law, a superseding cause that defeats a negligence claim under the Washington product liability act (WPLA), ch. 7.72 RCW.
  • Issue 2: Whether the complaints plausibly stated a WPLA product-seller negligence claim under RCW 7.72.040(1)(a).

2. Summary of the Opinion

The Supreme Court of Washington reversed the Court of Appeals and reinstated the trial court’s denial of Amazon’s CR 12(b)(6) motions to dismiss. The court held:

  • Suicide is not a superseding cause as a matter of law that categorically precludes WPLA negligence claims at the pleading stage.
  • The plaintiffs alleged sufficient facts to state a claim for product-seller negligence under RCW 7.72.040(1)(a).
  • The WPLA does not “freeze” common-law meaning as of 1981; Washington courts may use post-1981 common-law developments to interpret WPLA terms the statute does not define.

The majority emphasized the procedural posture: at CR 12(b)(6), courts must assume pleaded facts are true and dismiss only when no set of facts could justify recovery. The decision does not impose liability on Amazon; it allows the case to proceed to fact development.

3. Analysis

3.1. Precedents Cited (and How They Shaped the Decision)

A. Pleading-stage standards under CR 12(b)(6)

  • Cutler v. Phillips Petrol. Co. — Established de novo review and the principle that dismissal is disfavored and granted “sparingly.” This anchors the court’s restraint at the pleading stage.
  • Kinney v. Cook — Reaffirmed that courts presume pleaded facts are true and may consider hypothetical supporting facts, reinforcing that foreseeability/causation are rarely resolvable on the face of the complaint.
  • Birnbaum v. Pierce County and Paradise, Inc. v. Pierce County — Emphasized the “insuperable bar to relief” threshold; the Supreme Court used this to reject the Court of Appeals’ attempt to treat “suicide” as an automatic bar.
  • In re Parentage of C.M.F. — Cited for the “beyond a reasonable doubt” dismissal threshold in Washington; used to conclude the pleaded facts could support proximate cause.

B. WPLA exclusivity and use of common law to fill undefined terms

  • Macias v. Saberhagen Holdings, Inc. (citing Potter v. Wash. State Patrol) — WPLA is the exclusive remedy for product liability claims; product-based negligence is subsumed under WPLA. This framed plaintiffs’ claim as a WPLA negligence theory under RCW 7.72.040(1)(a).
  • Wash. State Physicians Ins. Exch. & Ass'n v. Fisons Corp. — WPLA supplants but does not abrogate common law; supports turning to common-law definitions for “negligence” and “proximate cause.”
  • Schwartz v. King County — Reinforced the general principle that common-law definitions fill statutory gaps; used to justify importing common-law proximate cause concepts into WPLA.

C. Whether WPLA “freezes” common law as of 1981

  • Spokane Methodist Homes, Inc. v. Dep't of Lab. & Indus. and Jongeward v. BNSF Ry. Co. — Cited by Amazon for the argument that statutory terms incorporate only contemporaneous common law. The court distinguished this approach in the WPLA context.
  • Ruiz-Guzman v. Amvac Chem. Corp. and Ayers v. Johnson & Johnson Baby Prods. Co. (relying on Hartley v. State) — The court used these to show it has previously interpreted WPLA terms using post-1981 sources (including Restatements and later cases). This undercut Amazon’s “frozen-in-1981” theory.

D. The “suicide rule” line: Arsnow, Orcutt, and the Court of Appeals’ reliance on Webstad

  • Arsnow v. Red Top Cab Co. — Historically limited liability when suicide follows an injury, except where suicide is involuntary (delirium/frenzy/uncontrollable impulse caused by defendant). The Court of Appeals treated Arsnow as broadly barring plaintiffs’ claims; the Supreme Court rejected that extension.
  • Orcutt v. Spokane County — Reaffirmed Arsnow and allowed proof of “uncontrollable impulse” through medical testimony; again, the Supreme Court viewed this as context-specific rather than a categorical bar.
  • Webstad v. Stortini (quoting Hepner v. Dep't of Lab. & Indus.) — The Court of Appeals relied on Webstad’s characterization of suicide as a voluntary, willful choice. The Supreme Court noted it was not bound by Webstad and refused to treat it as establishing a per se superseding-cause rule under WPLA at the pleading stage.
  • Hunt v. King County — Provided the majority’s key limiting principle: where suicide risk is known to a defendant (e.g., hospital context), suicide is not automatically a superseding cause as a matter of law. The majority analogized plaintiffs’ theory to Hunt: Amazon allegedly knew of the suicide-misuse risk and allegedly acted in ways that increased it.

E. Duty, foreseeability, and the scope-of-duty framework

  • Hansen v. Wash. Nat. Gas Co. — Provided the elements of common-law negligence (duty, breach, injury, proximate cause) used to evaluate a WPLA negligence claim.
  • McKown v. Simon Prop. Grp., Inc. (citing Schooley v. Pinch's Deli Mkt., Inc.) — Central to the court’s analysis: once duty exists, foreseeability defines scope of duty; foreseeability often becomes a jury question when tied to scope and proximate cause.
  • Maltman v. Sauer (quoting Rikstad v. Holmberg) — Used to articulate foreseeability’s role: whether the hazard that caused injury is among the hazards within the scope of the negligent conduct.
  • Washburn v. City of Federal Way — Supported the proposition that reasonable care includes avoiding foreseeable harm arising from third-party conduct; important because Amazon argued suicide is self-inflicted/third-party conduct breaking causation.
  • Mele v. Turner — Cited for the “obvious or known” danger argument; the court treated such contentions (misuse/assumption-of-risk-like arguments) as not eliminating duty at the pleading stage.
  • Baughn v. Honda Motor Co. — Invoked by Amazon to argue against imposing liability based on foreseeable misuse and to warn against juries “legislating” product availability; the court held Amazon overstated what denial of a motion to dismiss means and reiterated the limited function of CR 12(b)(6).
  • Beltran-Serrano v. City of Tacoma — Reinforced the general duty of reasonable care to avoid foreseeable harms; supported the baseline duty premise.

F. The concurrences’ distinct precedent and doctrinal emphasis

  • Bernethy v. Walt Failor's, Inc. — González and Mungia used Bernethy (and Restatement § 390) to frame Amazon’s alleged conduct as potentially beyond ordinary negligence (reckless/intentional) and as akin to negligent entrustment principles.
  • Hickle v. Whitney Farms, Inc. — Mungia cited it with Restatement § 390 to support negligent entrustment theory as part of the duty framework.
  • Halvorson v. Dahl and Bravo v. Dolsen Cos. — Cited in Mungia’s concurrence to restate the rigorous standard against dismissal at the pleading stage.
  • Gregoire v. City of Oak Harbor, Keene v. Edie, and Freehe v. Freehe — Mungia used these to argue policy disfavors categorical immunities and to situate suicide-causation rules within modern comparative fault principles.

3.2. Legal Reasoning

A. The court’s core holding: no per se “suicide = superseding cause” bar at the pleading stage

The majority did not hold that suicide can never be a superseding cause. It held that suicide is not, “as a matter of law,” always a superseding cause that defeats WPLA negligence claims. The majority’s reasoning tracks three steps:

  1. WPLA negligence claims use common-law negligence and proximate cause concepts because WPLA does not define “negligence” or “proximate cause,” and RCW 7.72.020(1) preserves common law except as modified.
  2. Arsnow is not a categorical rule applicable to every suicide-related tort theory; it arose in a distinct posture (post-injury suicide) and recognized that proximate cause may exist when suicide is connected to defendant-caused mental condition (delirium/frenzy/uncontrollable impulse).
  3. Hunt v. King County illustrates Arsnow’s limits: where suicide risk is known and creates a duty to safeguard against foreseeable consequences, suicide is not automatically superseding as a matter of law. Accepting plaintiffs’ allegations as true, Amazon allegedly knew of the sodium-nitrite/suicide connection and allegedly engaged in sales and recommendation practices that increased the risk—making it impossible to declare lack of proximate cause “beyond a reasonable doubt” on the pleadings.

B. Duty and foreseeability: duty exists; scope and proximate cause are fact-bound

The court agreed with the Court of Appeals on one important point: Amazon, as alleged product seller, owes a duty of reasonable care. The dispute concerned whether proximate cause was defeated as a matter of law by the suicides. Using McKown v. Simon Prop. Grp., Inc., the court emphasized that once duty exists, foreseeability generally defines the scope of duty and is often for the fact finder.

The majority treated plaintiffs’ foreseeability allegations as central: Amazon allegedly had actual knowledge of sodium nitrite’s use in suicides (parent reports, national trend data, foreign regulatory constraints, a FDA letter about mislabeled product used for suicide), and allegedly engineered its marketplace to facilitate the pathway (recommendations for Tagamet, scales, and a suicide-instruction book; reminder emails; deletion of “suicide” warnings in reviews). If proved, those facts could place suicide-related harm within the scope of foreseeable risk and thus within the scope of duty.

C. Rejecting Amazon’s “obvious danger / misuse” defenses at the motion-to-dismiss stage

Amazon argued that no duty should attach because the product’s danger was obvious/known and because liability for “misuse” of a nondefective product is disfavored. The court’s response was procedural and doctrinal:

  • At CR 12(b)(6), the question is legal sufficiency, not whether Amazon ultimately prevails on defenses.
  • Arguments framed as “misuse,” assumption of risk, or contributory negligence typically function as affirmative defenses, not duty-eliminating doctrines at the pleading stage.
  • Allowing the claim to proceed does not “legislate” product bans; it leaves fact questions (including foreseeability, scope, and causation) for later litigation stages.

D. The concurrences: expanding the lens beyond the majority’s narrow holding

González, J. (concurring) agreed dismissal was improper and added that the pleaded facts could support liability not only under RCW 7.72.040(1)(a) (negligence) but also under RCW 7.72.040(1)(c) (intentional misrepresentation or concealment), highlighting allegations that Amazon removed or concealed warning information (e.g., deleting reviews) and affirmatively marketed a “suicide kit” through recommendations. The concurrence underscores a potential escalation from negligence to recklessness/intentionality depending on proof.

Mungia, J. (concurring) went further and criticized the moral and conceptual premises of older “suicide rule” cases, arguing suicide is not “voluntary” in the legal sense because it is made under duress, and urging that Washington should abandon Arsnow/Orcutt’s categorical approach and instead treat suicide within comparative fault principles. Mungia also framed three duty theories grounded in the Restatement (Second) of Torts: § 281 (general reasonable care), § 390 (negligent entrustment), and § 388 (duty to warn).

Gordon McCloud, J. (concurring in concurrence) agreed that categorical immunity is unjustified but cautioned against replacing it with the opposite categorical rule. This concurrence argues the most accurate approach is: suicide is not necessarily a superseding cause; the question should generally remain for the jury on the facts.

3.3. Impact

A. Doctrinal impact: causation and suicide in Washington product-seller negligence

The decision’s practical rule is procedural but powerful: defendants cannot reliably obtain early dismissal of WPLA negligence claims merely by labeling the injury-causing act “suicide.” Instead, courts must evaluate pleaded facts about knowledge, foreseeability, and alleged risk-enhancing conduct. In cases involving dangerous products and self-harm, Washington courts are directed to treat superseding cause and foreseeability as fact-sensitive rather than categorically resolved on the pleadings.

B. WPLA interpretation: common law is not frozen in 1981

By rejecting Amazon’s “pre-1981-only” argument, the opinion reinforces that WPLA’s undefined terms can be interpreted using post-enactment common-law developments. That matters beyond suicide cases: it signals flexibility in WPLA negligence and proximate cause analysis, including reliance on later Restatements and modern case law where statutory text is silent.

C. Platform-commerce and “algorithmic merchandising” exposure

Although framed as a WPLA product-seller negligence case, the fact pattern (recommendations, prompts, co-purchasing suggestions, reminder emails, deletion of reviews) positions “algorithmic merchandising” as potentially relevant evidence of breach and foreseeability. Plaintiffs in future cases may plead not only that a product is dangerous, but that the marketplace design increased risk by bundling, recommending, or facilitating harmful combinations—pushing courts toward fact-intensive assessments rather than categorical bars.

D. Litigation-stage impact

The opinion shifts much of the decisive work to summary judgment and trial: discovery will likely focus on Amazon’s notice of misuse, internal policies on “restricted products,” recommendation and search features, moderation of reviews, warnings, and any age/purchaser verification. Defenses (misuse, assumption of risk, comparative fault, intervening/superseding cause) remain available but are less likely to succeed as threshold pleading dismissals.

4. Complex Concepts Simplified

  • WPLA (Washington product liability act): Washington’s statute governing most claims for harm caused by products. For “product liability claims,” it generally replaces (subsumes) separate common-law product-based negligence claims.
  • Product seller: A category under WPLA that can include retailers/marketplaces depending on statutory definitions and facts. Here, Amazon was treated (at the pleading stage) as a “product seller” for purposes of RCW 7.72.040.
  • CR 12(b)(6): A motion to dismiss for failure to state a claim. The court assumes the complaint’s facts are true and asks only whether the law could allow relief on some set of consistent facts.
  • Proximate cause: A legal link between breach and harm. It often includes (a) factual causation (“did it contribute?”) and (b) legal/scope limits (policy and foreseeability: “should liability extend this far?”).
  • Intervening vs. superseding cause: An intervening act occurs after a defendant’s act. It becomes “superseding” only if it breaks the chain of proximate cause—often a fact question tied to foreseeability and the risk created.
  • Foreseeability (as used here): Not “could anything happen,” but whether the kind of harm that occurred is among the risks that made the conduct arguably negligent. Foreseeability often defines the scope of duty and is commonly left to the jury.
  • Affirmative defenses (misuse, assumption of risk, comparative fault): Arguments that may reduce or defeat liability but usually require factual development; they seldom justify dismissal solely from the complaint’s face.

5. Conclusion

Scott v. Amazon.com, Inc. establishes that, in Washington, suicide is not categorically a superseding cause as a matter of law that bars WPLA product-seller negligence claims at the pleading stage. The court reaffirmed the demanding CR 12(b)(6) standard, held that WPLA’s undefined terms incorporate evolving common-law concepts (not frozen as of 1981), and emphasized that foreseeability and scope-of-duty questions—especially in a knowledge-and-risk-enhancement theory—are typically for the fact finder. The concurrences highlight the case’s broader implications: potential exposure for intentional concealment or reckless marketing under RCW 7.72.040(1)(c), and an emerging judicial skepticism toward blanket “suicide rule” immunities in modern tort law.