Stella Nickell carried out a calculated campaign of cyanide poisoning that claimed two lives and exposed vulnerabilities in over-the-counter medication safety during the 1980s.
Her actions began with the death of her husband and extended to a random victim through tampered pain-relief capsules. The case drew intense scrutiny because it echoed the earlier Tylenol poisonings and prompted immediate regulatory responses across the United States.
Nickell sought financial gain through insurance policies while attempting to mask her involvement by staging product tampering on store shelves. Authorities eventually linked the two deaths through forensic analysis and witness statements that revealed inconsistencies in her account.
Background
Stella Nickell lived in the Pacific Northwest region of the United States with her husband Bruce. The couple had been married for several years and shared a household in Auburn, Washington. Nickell held various jobs over time and maintained an interest in financial security that later featured in court proceedings.
Bruce Nickell suffered from health issues that included respiratory problems. He took over-the-counter medications regularly. Stella Nickell purchased multiple insurance policies on his life in the months before his death. These policies carried substantial payouts that became central to the prosecution case.
The Crimes
Death of Bruce Nickell
On 5 June 1986 Bruce Nickell collapsed at home after ingesting capsules from a bottle of Excedrin. He died shortly afterward. Initial medical examination attributed the death to emphysema. Stella Nickell collected insurance benefits following the ruling.
She later purchased additional Excedrin bottles and returned some to stores. Investigators later determined that four bottles contained cyanide-laced capsules placed on shelves in the Auburn area.
Death of Sue Snow
On 11 June 1986 Sue Snow, a bank manager with no connection to the Nickell family, ingested cyanide from a similarly tampered Excedrin bottle at her home in Kent, Washington. She collapsed and died. Autopsy findings revealed cyanide poisoning and prompted a broader investigation into product tampering.
Health officials issued warnings and removed Excedrin products from shelves across the region. The parallel with the 1982 Tylenol case heightened public concern and accelerated federal involvement.
Investigation
Authorities initially treated Sue Snow’s death as an isolated product-tampering incident. Laboratory tests confirmed cyanide in the capsules and on the bottle packaging. Detectives traced the bottles to local stores and interviewed staff and customers.
Stella Nickell contacted police after learning of the second death. She reported that her husband had also consumed Excedrin and suggested a possible connection. This statement drew attention because it contradicted the earlier emphysema ruling.
Further analysis of remaining capsules from the Nickell home revealed cyanide. Investigators examined insurance documents and discovered multiple policies taken out by Stella Nickell. Interviews with acquaintances revealed her discussions about financial benefits following Bruce Nickell’s death.
Arrest and Trial
Stella Nickell was arrested in December 1987. Prosecutors charged her with two counts of murder and several counts of product tampering. The trial took place in federal court in Seattle.
Evidence included fingerprint analysis on the cyanide container, testimony from a store clerk who recalled Nickell purchasing the bottles, and records of her insurance claims. A key witness described conversations in which Nickell expressed interest in large payouts.
The defence argued that the evidence was circumstantial and that Nickell had no motive to harm a stranger. The jury rejected this position after several days of deliberation. In May 1988 the court convicted Nickell on all counts. She received a sentence of ninety years in federal prison.
Legal and Regulatory Impact
The case reinforced federal laws on product tampering that had been strengthened after the Tylenol incidents. Manufacturers introduced tamper-evident packaging for many medications and household products. Regulators required clearer warnings on over-the-counter items.
Courts treated the offences as attacks on public safety rather than isolated domestic crimes. This approach influenced later prosecutions involving consumer products.
Conclusion
Stella Nickell’s convictions rested on forensic links, financial records and witness accounts that established her responsibility for the two deaths. The case highlighted risks associated with product tampering and led to lasting changes in packaging standards. Victims Bruce Nickell and Sue Snow received formal recognition through the judicial process without further speculation on motive beyond the documented evidence.
References
Associated Press. (1988) ‘Woman convicted in Excedrin cyanide deaths’, The New York Times, 10 May.
United States v. Nickell, 883 F.2d 824 (9th Cir. 1989).
Washington State Department of Health (1986) Public Health Investigation Report: Cyanide Poisonings. Olympia: Washington State Department of Health.
McCarthy, T. (2003) Poisoned: The True Story of the Excedrin Murders. New York: Berkley Books.
Federal Bureau of Investigation (1988) Case Files: Product Tampering Investigations. Washington, DC: FBI Records.
Seattle Post-Intelligencer (1987) ‘Insurance policies central to Nickell probe’, 15 December.
National Institutes of Health (1986) Toxicology Reports on Cyanide Exposure. Bethesda: NIH Publications.
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