1982 Chicago Tylenol murders

A possible suspect with deep ties to Los Angeles has emerged in the unsolved 1982 Tylenol murders, the Chicago-area poisonings that killed seven people after cyanide was laced into bottles of Extra-Strength Tylenol. The case, one of America's most notorious unsolved crimes, led to tamper-proof packaging laws. The new lead revives attention on a case that has gone cold for over four decades.

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.

New reporting identifies a California chemist who died in a church as a possible suspect in the 1982 Tylenol murders, the unsolved Chicago-area poisonings that killed seven people and led to sweeping changes in product packaging. The development renews attention on one of America's most notorious cold cases, with investigators and commentators weighing whether the identification finally offers an answer decades later.