Richard Brzeczek

This investigative series examines cases of murder motivated by a lethal mix of mental illness, role-playing rituals and bizarre religious beliefs.

Who really laced Tylenol with cyanide? This true-crime series examines alarming theories behind the unsolved killings — and tracks down a key suspect.

This investigative series examines cases of murder motivated by a lethal mix of mental illness, role-playing rituals and bizarre religious beliefs.

Who really laced Tylenol with cyanide? This true-crime series examines alarming theories behind the unsolved killings — and tracks down a key suspect.