Aly Vander Hayden

Former Gatekeepers cult member Dan Jess was gunned down after calling the group’s leader, Christopher Turgeon, a fraud.

While speaking with investigators, Dennis Rader opened up about defining moments in his childhood that hinted at his future as the BTK serial killer.

Although Holly Durben’s fatal shooting death was ruled undetermined, investigators believed bruising on her neck pointed toward homicide.

Tim Noble claimed his fiancée, Debbie Holden, shot herself in the head, but investigators became suspicious when he later showed up in the emergency room with the bullet in his leg.

In 1978, John Wayne Gacy, a well-respected businessman from Illinois, murdered more than 30 boys and young men.

Alexis Martin, a sex-trafficking survivor who was featured in "Kim Kardashian West: The Justice Project," was released from prison.

Alexis Martin was only 14 years old when she said she was sex trafficked by Angelo Kerney, the man she would later plead guilty to killing.

Serial killer David Berkowitz wrote a letter to law enforcement claiming that “Father Sam” commanded him to “go out and kill.”

For more than 20 years, Melissa Thomas’ family fought for justice and tried to find answers in their loved one’s brutal murder.

 “They didn’t know who the hell was doing it,” Sam Little told investigators.