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.

6 Things To Know About Aileen Wuornos

Wuornos, a former sex worker, claimed that her victims had either raped or attempted to rape her, and her serial killings were committed in self-defense.

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.

Illinois Police Raced To Find A Vicious Serial Killer Before He Could Strike Again

There were already two unsolved deaths in Peoria County, Illinois, when detectives were notified of another body dumped in a field.

'Happy Face Killer': How Keith Jesperson’s Daughter Discovered His Deadly Secret

“There was just something ‘off’ about him,” Melissa Moore says of the serial killer.