Signs of a Psychopath, Now They Lay Me Down to Sleep - Part 1

Police find a taunting note at the crime scene of a murdered 50-year-old mother.

A twisted murderer ends the lives of several locals in a quaint Maine village.

A 26-year-old man who killed his best friend twelve years prior requests a reduced sentence.

A young man asks to assist in a brutal murder investigation, but he may know more than they think.

A pregnant woman and her son disappear, and police question her ex-lover who is found to be violent.

Police retrace the last steps of a girl who never returned home from school.

Investigators fear that a missing woman's roommate could be a rare female psychopath.

A death row inmate grants a final interview weeks before his execution. In his final days, does the convicted murderer show signs of remorse?

Death row inmate John Hummel agrees to a final interview weeks before his execution.