At 89-years-old, David Carpenter—the 1980s serial killer known as the 'Trailside Killer'—is the oldest death row inmate in California. We explore Carpenter's early life, crimes and trial.

There was nothing on the surface that raised red flags about Robert Hansen. The unassuming Anchorage native was married with children and was the successful owner of a bakery. But Hansen eventually confessed to killing 17 women in the Alaskan wilderness in a most heinous way.

It's been nearly a decade since four bodies were discovered spread over a quarter of a mile stretch of beach in Long Island, New York. Since then, other remains have been found, with 10 victims or more now likely tied to a single perpetrator.

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.