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.