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.

Ann Wolbert Burgess tells A&E True Crime about how her expertise in victimology aided the FBI's Behavioral Science Unit in their mission to capture rapists and serial killers in the 1970s and '80s.

The New Hampshire serial killer admitted to killing two men on her farm, but claims it was because God told her to punish pedophiles.

Forensic psychologist, Dr. Katherine Ramsland, tells A&E True Crime about her over a decade-long correspondence with BTK and how she got into the mind of the prolific serial killer.