Tylenol

Investigators say a man found dead in an Idaho church roughly 40 years ago has been linked to the 1982 Chicago-area Tylenol poisonings, the unsolved case that killed seven people and transformed US drug packaging with tamper-proof seals. The identification of a possible suspect has revived attention to one of America's most notorious cold cases.

A California-based scientist has emerged as a possible suspect in the Tylenol murders, the unsolved 1982 Chicago-area poisonings that killed seven people and triggered a nationwide panic and major changes to product packaging. The identification renews attention on one of America's most notorious cold cases more than four decades later.