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Chicago Tylenol poisonings — the case in brief

UNSOLVEDChicago metropolitan area, Illinois0:50

In September 1982, seven people in the Chicago area died after taking Extra-Strength Tylenol capsules that had been laced with potassium cyanide after leaving the factory. The case remains unsolved as of 2026, though it led to nationwide tamper-resistant packaging reforms and federal anti-tampering laws.

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In September 1982 seven people in the Chicago area died The case remains unsolved as of 2026 though it led to nationwide tamper resistant packaging reforms and federal anti tampering laws Roger Arnold previously investigated in the Tylenol case is convicted of an unrelated murder Mary Kellerman 12 is hospitalized after taking a contaminated extra strength Tylenol capsule She dies the next day Six more people— Adam Stanley and Teresa Janis Mary McFarland Paula Prince and Mary Reiner— die after consuming cyanide laced Tylenol capsules The full case file is on Casebin

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