Piers Morgan enters Florida’s maximum security Blackwater River Correctional Facility to confront Mark Riebe, a convicted killer who has since confessed multiple times to the abduction and murder of thirteen women along Florida’s Gulf Coast.

At Missouri’s Crossroads Correctional Facility, Piers Morgan comes face to face with Lorenzo Gilyard—the Kansas City Strangler, and sets out to discover what drove this soft-spoken, seemingly ordinary man to kill multiple times over seventeen years.

After finding the body of 10-year-old Jessica Guzman, police connected a series of murders to Alex Henriquez—a successful businessman, who was later sentenced to 75 years in prison. Henriquez maintains his innocence in this meeting with Piers Morgan.

Piers Morgan sits down with Bernard Giles, a convicted serial killer who is willing to admit to his heinous crimes, and asks what motivated the man to commit those brutal acts.