He was sentenced to death in 1989 for 13 murders, but 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. Some women live dual lives as madams/escorts and everyday citizens.

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.'

We spoke to Zeman about the findings that made him, along with investigative journalist Maury Terry, question the official account that serial killer David Berkowitz acted on his own.

Twenty years after actor Robert Blake’s 2005 murder trial ended in acquittal, the shooting death of his wife remains officially unsolved.

The "Killer Clown" died via lethal injection in 1994.

In 1994, a South Carolina mother drowned her two young sons, Michael and Alexander, by launching her car into the John D. Long Lake. What's her life in prison like?

From Charles Stuart to Des Campbell, we look at some infamous killers who tried to make a quick buck putting their partners in the ground.

People with disabilities are especially vulnerable to becoming victims of financial, mental, physical or sexual abuse.

Twins Ronnie and Reggie Kray rose to notoriety as nightclub and gambling club owners who were involved in assaults and armed robberies.

Retired investigator Joe Kennedy established a coalition of investigators who help police departments in the U.S. solve cold cases.

Convicted murderers Richard Matt and David Sweat groomed prison worker Joyce Mitchell in an elaborate plot to escape.

A New York mother found her abducted young son across the world.

The mysterious multiple disappearances of Hannah Upp have been a public fascination for years—but are we any closer to finding answers?

In the panoply of American killers, Gary Ridgway stands out.