Serial Killers

Through his work with Dr. Al Carlisle, Manny Cortez was able to trace his violent roots to a book he found as a child that depicted violent acts against women.

A sadistic duo, Lawrence Bittaker and Roy Norris, used everyday items for torture and murder.

Dorothea Puente was ultimately accused of killing nine people — but a jury wasn't convinced.

Prosecutors argued serial killer Michael Gargiulo derived pleasure from sadistically murdering beautiful young women.

Peacock is making a new true-crime series about "Lonely Hearts Killers" Martha Beck and Raymond Fernandez.

Notorious serial killer Ted Bundy helped long-time girlfriend Elizabeth "Liz" Kloepfer raise her young daughter for years before his arrest.

In late 2007, a serial killer murdered and robbed John and Irene Bryant, Meredith Emerson and Cheryl Dunlap before leaving them in National Parks.

Serial killer expert Dr. Al Carlisle’s got into the head of mass murderers like Ted Bundy through prison interviews.

While serving a life sentence for his first murder, Austrian serial killer Jack Unterweger manipulated his supporters into believing that he had been reformed. Once released, he secretly began a spree of murders while embarking on a new career as a literary celebrity.

Steven Lorenzo pleaded guilty to the brutal 2003 date-rape killings of Jason Galehouse and Michael Wachholtz. He's asked to be sentenced to death because the conditions are more to his liking.