World's Most Evil Killers - Season 8

An in-depth look at the crimes of the most evil murderers. Mother Paige Birgfeld went missing in 2007 and her remains were found five years later. A decade on, police closed the net on a local mechanic.

In 1973, Dawn Magyar's body was found two months after she had vanished. Twenty-eight years on, advances in forensics helped solve the case. (

In 1999 and 2000, John Eric Armstrong prowled Detroit looking for sex workers. A seemingly normal father, no one suspected he was a killer.

Over a 25-year career of murder, Richard Biegenwald killed at least six people as he sought out ever more violent and inventive ways of dealing death. 

For Richard Kuklinski, crime was his way of life. As a professional murderer, his unusual methods led to a disturbing nickname, The Iceman. 

When police in Colorado interrogated Richard Paul White about the murder of his friend, he began confessing to even more horrifying crimes. 

From 1975 and 1980, Billy Mansfield Jr murdered at least five victims, but investigators suspect the extent of his serial killing is still to be revealed.

While working as a long-haul truck driver, serial killer Wayne Adam Ford strangled and dismembered his victims before dumping their bodies in creeks and rivers.

After a worker found the body of Jarrae Estepp at a California recycling center, detectives closed in on her murderer, Steven Dean Gordon, and discovered that he had killed before.