Episode 7: "My Friend the Murderer"

One man befriends two predators to uncover a conspiracy.

One man's research about John Wayne Gacy uncovered a connection to a nationwide sex trafficker. For four years he recorded his conversations with the Killer Clown. No one has heard these tapes before… until now.

Next Up

'Golden State Killer' Joseph James DeAngelo Pleads Guilty To 13 Murders

“I destroyed all their lives. So now I’ve got to pay the price,” he reportedly has said.

How Elusive Serial Killer Ted Kaczynski Was Unmasked As The Unabomber

The self-professed anarchist was captured in 1996 hiding out in a primitive Montana cabin.

Jeffrey Dahmer's Murderer Explains Why He Killed The 'Milwaukee Cannibal'

Christopher Scarver, who is serving time for killing his boss during a robbery, insists that Jeffrey Dahmer did not feel any remorse for his crimes.

5 Bizarre Facts You May Not Know About Serial Killer John Wayne Gacy

The “killer clown” continues to shock and horrify, decades after his execution.

Prolific Serial Killer Nurse Charles Cullen May Have Killed As Many As 400 Patients

The murderer’s 16-year medical career in New Jersey and Pennsylvania ended after he was arrested in 2003.

Infamous Canadian Couple Known As 'The Ken & Barbie Killers' Videotaped Their Crimes

Canadians Paul Bernardo and Karla Homolka were arrested for slaying schoolgirls in the early ‘90s, including her teenage sister.

Cracking The Code Of A Serial Killer: The Hunt For The Zodiac

Police Release Video of Long Island Serial Killer Victim in Her Final Hours

Over a decade after the remains of 11 people were found along a Long Island beach, police released new surveillance video of one of the victims shortly before meeting her killer.

Remains Of Jane Doe Identified As 15-Year-Old Arizona Girl Missing Since 1992

Investigators are looking into if the teenager could have fallen victim to a serial killer.

Midwestern Civil War Buff May Be Serial Killer Connected To Dozens Of Females’ Deaths

Larry DeWayne Hall was identified as a suspect in a kidnapping after a witness took down his van’s license plate number.