Serial killer Edmund Kemper, later known as the 'Co-Ed Killer,' was released on parole from Atascadero State Hospital when he was 21 after shooting and killing his grandparents when he was 15. Why did psychiatrists allow him to go free?

The serial killer brought fear to the University of Florida and surrounding area after murdering five young women over the course of three days in 1990.

We speak with author Dawn Keetley to gain insights into the life and crimes of Jesse Pomeroy, the pre-teen who tortured and killed children around Boston in the early 1870s.

What makes a murderer choose one killing method over another? We spoke with experts to gain insight into murder weapon preferences and what they mean.

Serial killer Lonnie David Franklin was arrested in 2010 due to a recovered DNA sample after murdering over the course of about 25 years. Learn about his victims.

In 1996 at Shenandoah National Park, Lollie Winans and Julie Williams were murdered. The case remains unsolved. Journalist Kathryn Miles believes investigators focused on the wrong man.

We spoke a victim of Alex Christopher Ewing, also known as the Hammer Killer, about the struggles she's faced since the loss of her family.

We speak with Paul Holes, a forensic scientist who helped catch the Golden State Killer, about the havoc wreaked on the life of a homicide investigator.

After a brutal killing spree during the 1980s and 90s, Gary Ridgway pleaded guilty to 49 murders in 2003. We look into who actually survived encounters with the serial killer.

Ron Franscell, author of 'ShadowMan,' speaks with us about the first case in which the profiling technique, often used by the FBI Behavioral Analysis Unit, successfully apprehended a suspect.