Israel Keyes—a murderer who perplexed even the FBI's top minds in criminal profiling—traveled America leaving 'kill kits' with weapons and other items in secluded locations, picking them up before abducting and murdering a chosen victim.

During the 1970s, David Berkowitz, also known as 'The Son of Sam,' prowled New York City, fatally shooting couples in cars. By the time he was arrested in August 1977, he had killed six people and wounded seven others. Although the murders stopped after his arrest, several people who worked on the Son of Sam case are convinced Berkowitz didn't act alone.

It's hard to imagine there was once a time when women trusted serial killer Ted Bundy to take care of their children—but that's exactly what happened in the summer of 1975. Bundy would sometimes take two young boys to a local pool or the drive-in. Years later, one of those boys reflects on incidents that may have hinted at Bundy's dark and secretive world.

Chris Watts, the Colorado man serving three life sentences for the brutal murder of his wife and two young daughters claims to have had a religious conversion behind bars and is now an evangelical Christian. Murderers David Berkowitz, Jeffrey Dahmer and Karla Faye Tucker also claimed to have found or rediscovered God after being incarcerated. We speak with experts about why so many notorious criminals might make such claims while behind bars.

Former FBI special agent John Douglas spent his 25-year career with the Bureau interviewing hundreds of America's most infamous killers, from Charles Manson and Ted Bundy to the 'BTK Killer,' Dennis Rader and more. The 'Mindhunter' author talks to us about his new book, 'The Killer Across the Table,' and his tried-and-true interview techniques.

From 'Kayak Killer' Angelika Graswald to cult leader Charles Manson, A&E True Crime looks at infamous criminals who profited in some way from their misdeeds, showing that sometimes crime does indeed pay.

The actor talks about his late wife Michelle McNamara's role in helping identify the Golden State Killer suspect.

A retired police investigator thinks the same person who killed JonBenét in 1996 could have killed two other girls in 1984 and 1993.

Historian Hallie Rubenhold, author of the book, 'The Five: The Untold Lives of the Women Killed by Jack the Ripper,' believes the victims of Jack the Ripper weren't all sex workers—they were just women who were asleep.

Ever since 'Golden State Killer' suspect Joseph DeAngelo was arrested in April 2018 after being tracked down with the help of an online DNA database typically used for tracking genealogy, crime-solving via genetic genealogy has increased. Last year, investigators made more than 20 arrests in cold cases. But given that there are thousands of murders in America every year, of which 40 percent go unsolved, why aren't DNA databases being used to solve even more crimes?