Overview: The life and times of one of the most notorious real-life American serial killers. Chronicling the sinister crimes of the grave robber who went on to become the villainous muse and inspiration for horror classics—such as "The Silence of the Lambs," "Psycho," and "The Texas Chainsaw Massacre"—this two-hour documentary on the Discovery+ is part of their hit "Shock Docs" series.