Seven deaths in two days
Between September 29 and 30, 1982, seven people in the Chicago area died after taking Tylenol capsules contaminated with cyanide. The FBI’s Chicago office describes a joint investigation involving agents and local and state investigators. The victims’ ordinary purchase of a widely available product made this a case in which investigators had to reconstruct distribution and access as well as the events immediately preceding each death.
The shared product helped connect cases that might first have appeared unrelated. It also created several questions. Which bottles could be tied to a death? How did each reach the person who took the medicine? At what stage could someone have altered the contents? Each answer required evidence about a particular bottle or purchase.
The letter and the poisonings
James Lewis was prosecuted for an attempt to extort money from the manufacturer. The FBI’s account separates that charge from the murders. An extortion demand can be investigated through the communication itself and the conduct of the person who made it. To bring a murder case, investigators would need evidence connecting a person to the poisonings.
That difference is easy to lose when an account uses the phrase “the Tylenol case” for both investigations. A conviction for a crime that followed the deaths does not resolve how the capsules were altered or who was responsible for those deaths.
What investigators reviewed again
In 2009 the FBI announced a review of evidence with Illinois authorities. The agency cited advances in forensic technology and the tips generated by renewed publicity. A review tells readers that investigators were examining material again. It leaves open whether that work produced evidence strong enough for a new charge.