On December 4, 1978, Billy Milligan, who was charged with the kidnapping, robbery and rape of three women, became the first defendant found not guilty by reason of insanity due to multiple personality disorder, now reclassified as dissociative identity disorder.

In 1999, Cary Stayner, brother of high-profile abduction victim, Steven Stayner, murdered four females at Yosemite National Park. Where is he today?

Throughout the years, some murderers have turned to the popular classifieds advertisements website to find their victims. Here's why.

Lisa Montgomery spent years on death row after committing a horrific crime. While there, she began to recover from a lifetime of nightmarish abuse. In January 2021 she was the first woman executed by the U.S. government in 67 years.

From Mary Stauffer to Colleen Stan to Elizabeth Shoaf and more, read the unbelievably horrific true stories of women and young girls who were kidnapped, raped and tortured—in some cases for many years—before they escaped.

Jeffrey Dahmer was just 18 when he committed his first murder, much younger than the average age of serial killers, which researchers have determined is around 29 years old. Why did he wait nearly a decade before killing his next victim?

SVU detectives are trained and equipped to handle cases involving sexual assault, abuse and interpersonal violence. Hear from one detective what it's like working a real-life SVU.

Over nearly two decades, Dennis Rader murdered at least 10 people in the Wichita, Kansas area under the pseudonym BTK ('Bind, Torture, Kill'). But despite his repeated taunts to the police and media, investigators were unable to hone in on a suspect.

Gary Heidnick's crimes helped inspire Buffalo Bill's character in 'Silence of the Lambs.' We spoke with the killer and self-described pastor's defense lawyer, Charles Peruto, Jr., about what it was like representing one of Philadelphia's most infamous criminals.

Posthumous DNA testing proved what Roger Keith Coleman repeatedly denied—that the Virginia man raped and murdered his sister-in-law in 1981.