Dr. Richard Lettieri, a forensic neuropsychologist and psychoanalyst who's assessed hundreds of murderers throughout his career, talks to us about his most memorable cases and his book, 'Decoding Madness.'

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.

It’s been 25 years since the French producer's murder in West Cork, which shocked the normally crime-free region of Ireland. But the unsolved crime continues to make headlines due to controversy around the case’s main suspect, English journalist Ian Bailey.

One expert says priests in Mexico are targeted because they work in direct opposition to the interests of organized crime, which in many instances has infiltrated or overrun law enforcement throughout the country.

In criminal investigations, bones can help identify human remains and often reveal how a person died. 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?

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