We speak with author Mikita Brottman on her book 'Couple Found Slain: After a Family Murder' about the Brian Bechtold case and the grim daily reality of patients in forensic psychiatric hospitals.

Last words are part of a long practice in the United States, allowing the condemned a final opportunity to express themselves or ask for forgiveness.

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

The French producer's murder in West Cork shocked the normally crime-free region of Ireland.

One expert says priests in Mexico are targeted because they work in direct opposition to the interests of organized crime.

In the decade since FLDS leader Warren Jeffs was sentenced to life in prison for sexually abusing underage girls he married, evidence suggests he maintains a grip on a diminished, but devout group of followers.

Sue Black, a renowned forensic anthropologist, gives us insights into the stories bones tell.

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?

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.

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