In 1986, Excedrin bottles sold by a store in Kent, Washington were investigated by police after Susan Snow died from taking pills poisoned with cyanide. Investigators later found a chemical used to clean the algae in fish tanks mixed with the cyanide and, through pet store records, traced the chemical to Stella Nickell. Stella's husband Bruce had recently died, and, with this new information, detectives re-opened the investigation into his death. Stella had increased Bruce's life insurance shortly before his death. Because the death had to be accidental in order to receive the insurance pay out, she laced several other bottles, waiting for a second poisoning to occur.