
S01E01 Pain Killer
After cyanide-laced Tylenol kills multiple people across Chicago, police and the media scramble to spread a nationwide warning.
A key suspect maintains his innocence, even as authorities discover his suspicious past and possible motive. Tylenol unveils new triple-seal packaging.
Who really laced Tylenol with cyanide? This true-crime series examines alarming theories behind the unsolved killings — and tracks down a key suspect.