In 1982, a number of mysterious deaths that occurred close to Chicago sparked widespread fear across the country.
One terrifying factor links all of the victims together, and that is the fact that the Extra Strength Tylenol capsules contained cyanide. Even now, forty years later, the FBI is still looking into the matter.
Is it possible that the murderer, who has eluded capture thus far, will finally be identified and brought to justice?
History’s Greatest Mysteries: The Chicago Tylenol Murders premieres Wednesday 28 September at 7.30pm on History or watch On Demand
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