George Olivo, a retired FBI special agent and senior polygraph examiner, on how polygraph tests work and their reliability.

In January 1958, Charles 'Charlie' Starkweather murdered 10 people in Nebraska and Wyoming with his 14-year-old girlfriend by his side.

Two years after the Jonestown Massacre, ex-members of the cult, Al, Jeannie, and Daphene Mills, were murdered. The killer was never caught.

The Air Force Major and his wife ran a successful home health business. But with success came conflict. In March 2019, Andreen went missing.

After a heated argument with her partner in which she grabbed a machete, Donjane Smith was arrested for aggravated assault. She claimed self-defense.

In 2020, Heather Guerra was involved in a car crash that killed her son, Julian. She faced charges of manslaughter and aggravated assault.

When Mary Bailey was 11 years old, her mom asked her to shoot her abusive stepfather. She obliged. She speaks with us about how that action has affected her life.

After Wisconsin woman Julie Jensen was found dead in her bed, it was uncovered that her husband, Mark Jensen, poisoned her with antifreeze, drugged her with sleeping pills and suffocated her.

In 2022, Vicky White, an Alabama corrections officer, helped an inmate, Casey White, escape. But she's not the only prison worker who's risked her life to help an inmate break free. We speak with experts on the phenomenon of officer-inmate relationships.

Jana Monroe, one of the FBI's first female agents with the Behavioral Science Unit, on what it was like interviewing serial killers.