A single mom's disappearance led to a web of deceit.

Reporter Philip Eli on his book 'Prescription for Pain' and how a doctor with three decades of experience as a pediatrician and emergency room physician wound up with a life sentence.

Rodney Alcala, the "Dating Game Killer" isn't the only killer, to go on a game show. Experts speak about why some killers wanted to compete.

The murders of real estate agents Ashley Okland and Beverly Carter reflect a disturbing pattern of real estate industry violence that affects professionals in the field, regardless of age, location and gender.

The convicted killer and father of 12 tortured and sexually abused his children for years, exerting such power that some of them murdered at his command.

Music journalist and author Joel Selvin talks about the mental health issues that derailed the famous rock drummer's life and career.

In 2006, four sex workers were found dumped in a ditch near Atlantic City's border. The serial killer has yet to be identified.

Jung Yoo-jung, a 23-year-old true crime fan, killed a female tutor in South Korea. Her motive? She was curious about what it would be like to murder someone.

Mari Keiko Gonzalez speaks with A&E about what inspired her to work in the editing field and more.

Journalist Bob Cyphers on the decades-long search for the unidentified serial killer and what's made the process of identifying him so hard.

Tom DeSena and Junior Lallbachan, experienced biohazard and crime scene cleaners popular on TikTok, tell us about their unique line of work.

A Pennsylvania woman was found dead in her car in 2014 after getting into an argument with her boyfriend. The cause of her death is unknown.

The victim of Munchausen by Proxy, who went to prison for her participation in the murder of her abuser, her mother, Dee Dee Blanchard, speaks with us about her new freedom.

Gregg Olsen takes a closer look at the barn fire death of an Amish woman, whose husband, Eli Stutzman, was convicted of a separate murder.

She said a difficult childhood helped her survive.

George Olivo, a retired FBI special agent and senior polygraph examiner, on how polygraph tests work and their reliability.

In January 1958, Charles 'Charlie' Starkweather murdered 10 people in Nebraska and Wyoming with his 14-year-old girlfriend by his side.

Two years after the Jonestown Massacre, ex-members of the cult, Al, Jeannie and Daphene Mills, were murdered. The killer was never caught.

The Air Force Major and his wife ran a successful home health business. But with success came conflict. In March 2019, Andreen went missing.

For years, Rader terrorized Kanasa as the "BTK Killer."