Learn about the early years of one of America's most infamous serial killers, Gary Ridgway, who was convicted of murdering 49 people.

What did the killer do in the days before being executed for the murder of 168 people? What was his last meal, last words and last activities?

The Night Stalker, sentenced to death in 1989 for 13 murders, escaped execution when he died of natural causes in 2013.

Albert DeSalvo, believed to be the serial killer responsible for the deaths of 13 women in the Boston area in the early '60s, told of a childhood marked by extreme violence and cruelty.

In the spring of 1999, the 22-year-old targeted London's Black, Bangladeshi and gay communities with homemade explosives. Where is he today?

Some of the most infamous criminals in history experienced murders first-hand before they starting doing the killing themselves.

Sydney Biddle Barrows, Rose Laws and more. The reasons some women live dual lives as madams/escorts and everyday citizens is varied, but almost always a challenge.

Decades after a series of unsolved murders of redheaded females throughout the 1980s, a profile of a mysterious serial killer known as "The Bible Belt Strangler" emerged.

We speak with experts about the various reasons why notorious murderers become targets themselves while behind bars.

We speak with author Sarah Berman on her book, 'Don't Call It a Cult: The Shocking Story of Keith Raniere and the Woman of NXIVM.'