Mark of a Serial Killer

Before watching "Mark Of  A Serial Killer," learn how a task force tracked Louisiana's “most gruesome serial killer,” a person strangling homeless men to death.

Even in Hawaii, there has been a serial killer. See which murderer stalked your state.

Young women in shallow graves was ruthless killer David Leonard Wood's grim signature. 

Anthony Shore used homemade ligatures to murder his victims, including a 9-year-old girl.

Familial DNA and pizza helped the LAPD finally catch the "Grim Sleeper" serial killer.

A duo known as the Serial Shooters stalked Phoenix, Arizona the same time the Baseline Killer did.

"Mark Of A Serial Killer," which returns to Oxygen on Saturday, April 2 at 8/7c, takes a deep dive into the most disturbing murder cases of all time.

In the 1980s, Larry Eyler, a vicious murderer who preyed on young men, became known as the Highway Killer.

In the 1990s, women were found dead in homes that had been set on fire across Chicago.

Between 1993 and 1998, a Chicago serial killer preyed upon women in the Englewood community.