In 1986 two deaths from cyanide in Washington state prompted a lengthy inquiry that exposed deliberate product tampering for personal profit.
Stella Nickell’s actions centred on her husband’s life insurance policies and an attempt to mask the cause of his death. The case drew attention because it involved the contamination of over-the-counter medication sold in ordinary shops, raising immediate public concern about consumer safety across the United States.
Investigators initially treated the deaths as random acts of tampering similar to the 1982 Chicago Tylenol incidents. Only after persistent forensic work and repeated interviews did the focus shift to a single individual with a clear financial motive.
Background
Stella Nickell grew up in the Pacific Northwest and married Bruce Nickell in 1976. The couple lived in Auburn, Washington, where Bruce worked in a local aluminium plant. Stella held several jobs over the years, including roles in a pet shop and as a part-time bookkeeper. Their marriage had periods of strain, yet the pair remained together until Bruce’s death.
Bruce suffered from emphysema and took pain relief medication regularly. Stella later stated that she purchased Excedrin capsules for him on several occasions in the spring of 1986. The household also kept other over-the-counter remedies in the medicine cabinet.
The Poisonings
On 11 June 1986 Bruce Nickell collapsed at home after taking Excedrin capsules. He died the same day. Medical examiners attributed the death to emphysema. Five days later Sue Snow, a bank manager in nearby Kent, also collapsed after taking Excedrin capsules from a different bottle. She died in hospital.
Autopsies revealed cyanide in both victims. Health authorities immediately recalled thousands of Excedrin bottles from shelves in several western states. No further deaths occurred, yet the contamination triggered widespread fear among consumers.
Investigation
Police and federal agents examined the two recovered bottles. Both contained capsules laced with cyanide. Investigators traced the lot numbers and interviewed pharmacy staff and shoppers who had purchased similar packages. Early leads pointed to possible random tampering by an unknown individual.
Stella Nickell contacted authorities several times with suggestions about possible suspects. She also volunteered information about her husband’s purchase habits. Detectives noted that her accounts contained small inconsistencies. A second examination of Bruce Nickell’s body found traces of cyanide that had been overlooked in the first autopsy.
Laboratory analysis showed that the cyanide in the capsules matched a commercial product used in metal extraction. Stella had access to such chemicals through her work at a pet shop that maintained aquariums. The discovery narrowed the focus to her as the primary suspect.
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 Seattle in 1988. The prosecution presented evidence of insurance policies worth more than $70,000 that Stella stood to receive upon Bruce’s death.
Witnesses testified that Stella had researched cyanide and had asked questions about its effects. A fingerprint belonging to Stella was found on a book about poisons that had been borrowed from a local library. The defence argued that the evidence was circumstantial and that Stella had no reason to harm Sue Snow.
The jury convicted Stella Nickell on all counts after several days of deliberation. She received a sentence of ninety years in federal prison. Appeals continued for many years but did not overturn the verdict.
Motives and Profile
Financial gain formed the central motive. Stella had taken out multiple life insurance policies on Bruce without his full knowledge. The policies contained clauses that paid extra if death resulted from accident or homicide. By staging a product-tampering death, Stella hoped to collect the larger sum and avoid suspicion.
Psychological assessments described Stella as organised and methodical. She showed little remorse during interviews and maintained her innocence throughout the legal process. Experts noted that her planning extended over several months and included attempts to deflect attention onto imaginary third parties.
Legacy and Cultural Impact
The case prompted changes in federal law regarding product tampering. Penalties for contaminating consumer goods increased, and manufacturers introduced tamper-evident packaging on many medications. Consumer groups used the incident to press for stricter oversight of over-the-counter drugs.
Stella Nickell remains one of the few women convicted of using cyanide in a serial poisoning scheme in the United States. The case continues to appear in discussions of forensic toxicology and insurance fraud. Law enforcement agencies cite it as an example of how persistent re-examination of evidence can shift an inquiry from random crime to targeted homicide.
Conclusion
The deaths of Bruce Nickell and Sue Snow resulted from a deliberate plan to secure insurance money through deception. Careful forensic work and sustained investigative effort identified the source of the cyanide and established the sequence of events. The case illustrates how financial motives can lead to elaborate attempts to disguise murder as random violence.
Bibliography
Associated Press. (1988) ‘Woman convicted in cyanide murder case’, The New York Times, 10 May.
Federal Bureau of Investigation. (1988) Case file: Excedrin tampering investigation. Washington: FBI Records.
McCarthy, T. (2001) Poisoned lives: true stories of product tampering. New York: St Martin’s Press.
Seattle Times staff. (1987) ‘Cyanide deaths lead to arrest of Auburn woman’, The Seattle Times, 10 December.
United States Court of Appeals. (1991) United States v. Stella Nickell, 943 F.2d 884.
Washington State Department of Health. (1986) Public health report on Excedrin contamination. Olympia: Washington State Archives.
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