In June 1986 two sudden deaths from cyanide in over-the-counter painkillers prompted an urgent investigation across Washington state.
Stella Nickell lived in the small community of Auburn and worked as a bank teller. Her husband Bruce collapsed at home on 11 June after taking Excedrin capsules. Paramedics found no immediate cause, and his death was initially attributed to emphysema. Days later a woman named Sue Snow suffered a similar collapse in her bathroom after using the same brand of capsules. Laboratory tests quickly identified potassium cyanide in both victims’ systems. The discovery triggered a nationwide recall and placed product tampering at the centre of a criminal inquiry.
The case stood out because the poison appeared in sealed retail packages rather than in a single targeted batch. Investigators examined hundreds of bottles from stores in the Seattle area. Most contained no contaminant, yet four bottles held capsules laced with cyanide. The pattern suggested someone had purchased products, tampered with them, and returned them to shelves. Public concern rose sharply after the 1982 Tylenol murders in Chicago, and authorities treated the Washington incidents with the same level of urgency.
Background
Stella Nickell had married Bruce in 1974. The couple lived with their daughter in a modest home. Bruce worked in construction and held several life-insurance policies that named Stella as beneficiary. Records later showed the policies totalled more than $70,000. Stella had previously worked in various clerical roles and maintained a quiet public profile. Neighbours described the household as ordinary, with no outward signs of conflict.
Family circumstances
Court documents revealed that Stella had taken out additional insurance shortly before Bruce’s death. She had also inquired about coverage for accidental death. These financial details drew attention once the cyanide connection emerged. Stella’s daughter from a previous relationship lived in the home and provided statements during the investigation.
The Crimes
Bruce Nickell died on 11 June 1986. An autopsy found no trauma or obvious disease beyond his known respiratory condition. Five days later Sue Snow, a stranger to the Nickell family, died after ingesting capsules from a different bottle purchased at a local store. Both deaths resulted from acute cyanide poisoning. Investigators determined that the capsules had been opened, the contents replaced with cyanide, and the capsules resealed with an adhesive.
Further testing located two additional contaminated bottles on store shelves. One bore Stella Nickell’s fingerprints. The presence of these bottles indicated an attempt to create the appearance of random tampering rather than a single targeted attack.
Investigation
The Food and Drug Administration and local police coordinated the response. Agents traced the lot numbers of the poisoned bottles and interviewed store staff. Stella Nickell contacted authorities early, offering information about her husband’s purchase habits. She claimed he had bought Excedrin recently, yet receipts and pharmacy records did not match her account.
Key evidence
Laboratory analysis showed that the cyanide used in the capsules matched a commercial product available at garden-supply stores. Stella had purchased such a product for use on her aquarium fish. Traces of the same cyanide source appeared in the tampered capsules. In addition, green algae remover found in Stella’s home contained an inert ingredient that matched particles recovered from the poisoned bottles.
Capture and Arrest
Stella Nickell was arrested in December 1987. Federal prosecutors charged her with product tampering and two counts of murder. The case relied on circumstantial evidence, including the fingerprint on a contaminated bottle and the insurance policies. No direct witness placed Stella at the store shelves, yet the combination of physical traces and financial motive proved compelling.
Trial
The trial took place in federal court in Seattle in 1988. Prosecutors presented the fingerprint evidence, the matching cyanide source, and testimony about Stella’s insurance inquiries. Defence counsel argued that the evidence remained indirect and that another individual could have tampered with the products. The jury convicted Stella Nickell on all counts after several days of deliberation.
She received a sentence of ninety years in prison. The verdict marked the first federal conviction for product tampering resulting in death.
Psychological Profile
Court-appointed evaluations described Stella Nickell as organised and deliberate in her planning. She showed no signs of acute mental illness that would meet an insanity defence. Observers noted her calm demeanour during interviews and her focus on financial arrangements. The case illustrated how personal financial pressures could escalate into lethal action against both a family member and an unrelated victim.
Legacy and Cultural Impact
The Nickell case prompted stricter federal regulations on over-the-counter medication packaging. Tamper-evident seals became standard across the industry. The episode also reinforced public awareness of product safety following the earlier Tylenol incidents.
No further deaths occurred from the same tampering method. The investigation remains a reference point for law-enforcement training on tracing contaminants in consumer goods.
Conclusion
Stella Nickell’s conviction rested on physical traces, financial records and forensic links between cyanide sources. The deaths of Bruce Nickell and Sue Snow led to lasting changes in packaging standards and demonstrated the reach of federal product-tampering statutes. The case continues to serve as a clear example of how evidence from multiple disciplines can resolve a crime that initially appeared random.
Bibliography
Associated Press. (1988) ‘Woman convicted in cyanide-tampering deaths’, The New York Times, 10 May.
Seattle Times staff. (1986–1988) Court coverage and trial reports. Seattle: The Seattle Times.
United States v. Nickell, 1988. United States District Court, Western District of Washington. Trial transcripts.
Food and Drug Administration. (1986) Report on Excedrin product contamination. Washington, DC: FDA.
Rule, A. (2001) Small Sacrifices: A True Story of Passion and Murder. New York: Signet. (Updated edition covering related cases.)
Washington State Department of Health. (1986) Autopsy and toxicology findings: Bruce Nickell and Sue Snow. Olympia: State of Washington.
National Institute of Justice. (1990) Product tampering investigations: Case studies. Washington, DC: NIJ.
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