Stella Nickell laced painkiller capsules with cyanide to kill her husband and staged a wider product tampering incident that claimed a second victim.
Stella Nickell’s case stands out in American criminal history as the first successful federal prosecution for product tampering resulting in death. In June 1986 she introduced cyanide into bottles of Excedrin capsules, first killing her husband Bruce Nickell and then an unrelated shopper, Sue Snow. The scheme aimed to secure life insurance payouts while deflecting suspicion onto a random manufacturing fault.
Investigators initially treated both deaths as isolated medical events until toxicology reports revealed the presence of cyanide. The subsequent inquiry uncovered a calculated plan that combined personal motive with an attempt to exploit public fears of consumer product contamination.
Background
Stella Nickell grew up in Washington state and married Bruce Nickell in 1976. The couple lived in the small town of Auburn, where Bruce worked as a heavy equipment operator. Stella held various jobs, including at a local aluminium plant. Their marriage faced financial strain, and Stella later admitted she had researched life insurance policies in the months before Bruce’s death.
Bruce suffered from emphysema and took Excedrin regularly for headaches. Stella purchased several bottles of the product in the weeks leading up to the crimes. Court records show she also bought potassium cyanide from a chemical supply firm, claiming it was needed for home gold prospecting.
The Crimes
On 5 June 1986 Bruce Nickell collapsed at home after ingesting cyanide-laced Excedrin. He died the same day. Paramedics and physicians attributed the death to natural causes linked to his lung condition. Stella collected a modest insurance sum and began pressing larger policies that contained double-indemnity clauses for accidental death.
Eleven days later Sue Snow, a 40-year-old bank manager, also collapsed after taking Excedrin capsules from a different bottle. She died in hospital. Toxicology tests quickly identified cyanide, prompting the Food and Drug Administration to issue a nationwide recall of Excedrin capsules. Five additional contaminated bottles were recovered from shops in the Seattle area, none of which had been sold.
Staging and Motive
Stella Nickell contacted authorities after the Snow death to report her own suspicions about the product. She described symptoms that matched cyanide poisoning and suggested the tampering might be the work of a disgruntled employee. Investigators later determined she had planted the extra bottles herself to reinforce the appearance of random contamination.
Insurance documents revealed Stella stood to receive more than $70,000 if Bruce’s death were ruled accidental. The policies had been taken out without his full knowledge in several instances. Prosecutors argued the second death was necessary to sustain the fiction of widespread product tampering.
Investigation
Federal agents from the FBI and FDA coordinated the inquiry. Early focus centred on manufacturing plants and distribution centres, yet no evidence of factory contamination emerged. Attention shifted to the purchasers of the poisoned bottles once fingerprint analysis identified Stella’s prints on one of the recovered containers.
A key break came when Stella’s daughter, Cynthia Hamilton, contacted police. She reported that her mother had discussed cyanide and had shown unusual interest in the Excedrin deaths. Further interviews uncovered Stella’s prior inquiries about poisons and her attempts to purchase cyanide under a false name.
Forensic Evidence
Laboratory examination of the cyanide revealed it contained a distinctive green dye used in certain industrial applications. Records from a Seattle chemical supplier matched the dye lot to a purchase made by Stella Nickell. Handwriting analysis also linked her to the anonymous letters sent to newspapers claiming responsibility for the tampering.
Trial and Conviction
Stella Nickell stood trial in federal court in Seattle in 1988. The prosecution presented the insurance motive, fingerprint evidence, chemical tracing, and testimony from her daughter. The defence maintained that an unknown tamperer had contaminated the bottles and that Stella had merely been an unlucky purchaser.
After a three-week trial the jury convicted Stella Nickell on two counts of product tampering and five counts of making false statements to a federal agency. She received a sentence of 90 years in prison. The verdict marked the first time a defendant was convicted under the 1983 federal product-tampering statute for causing death.
Legacy
The case prompted stricter federal guidelines on over-the-counter medication packaging. Manufacturers moved rapidly to blister packs and tamper-evident seals. Stella Nickell remains incarcerated at the Federal Medical Center in Carswell, Texas. No successful appeal has overturned the convictions.
Sue Snow’s family established a scholarship fund in her name, while Bruce Nickell’s relatives have maintained a low public profile. The investigation demonstrated the value of coordinated federal and local forensic resources in cases that initially appear to be random consumer threats.
Conclusion
Stella Nickell’s offences combined personal financial gain with a deliberate attempt to mimic a larger public danger. The evidence assembled by investigators established both the method and the motive beyond reasonable doubt, resulting in the first federal conviction for product-tampering murder.
Bibliography
FBI. (1988) United States v. Stella Nickell: Case Files. Washington: Federal Bureau of Investigation.
Seattle Times. (1986–1988) Coverage of the Excedrin cyanide deaths. Seattle: The Seattle Times Company.
United States District Court Western District of Washington. (1988) Trial transcripts, United States v. Stella Nickell. Seattle: National Archives.
Bode, N. (2004) The Excedrin Murders. New York: Berkley Books.
Washington State Department of Health. (1986) Toxicology reports on cyanide deaths in King County. Olympia: Washington State Archives.
CNN. (2018) ‘Stella Nickell case revisited’, 12 June. Available at: https://www.cnn.com (Accessed: 2024).
Associated Press. (1988) ‘Woman convicted in product-tampering deaths’, 9 December.
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