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-laced capsules were placed in Extra-Strength Tylenol bottles. The case, which led to sweeping tamper-proof packaging laws, has never produced charges, and any newly identified suspect would represent one of the biggest developments in the decades-old investigation.

A California-based scientist has emerged as a possible suspect in the 1982 Chicago Tylenol killings, the unsolved poisoning deaths of seven people who took cyanide-laced extra-strength capsules. The cold case has drawn renewed attention after the name surfaced in reporting, reviving debate over one of America's most notorious unsolved crimes and the investigation that followed.