The 1979 murder of 6-year-old Etan Patz was one of the most memorable unsolved cases in New York City history. It was solved in 2017.

A Manchester, England doctor murdered at least 215 patients (though suspected in 284 deaths) using diamorphine between 1975 and '98, making him one of the most prolific serial killers in history.

A Baltimore woman spent decades searching for her birth certificate and discovered the family who raised her wasn't her family at all.

The eccentric millionaire and heir to a real estate dynasty's decades-long crime spree ended with a hot-mic confession and a memorable trial for the murder of Susan Berman.

Selena, John Lennon and Dimebag Darrell are just a few of the celebrities killed by fans who once idolized them. So how did their love and fandom lead to murder?

In 1957, the notorious Wisconsin killer was arrested for murdering two women and digging up corpses. What influenced his gruesome behavior?

The Munchausen syndrome by proxy victim was freed from prison in 2023 for her role in the murder of her abuser, her mother.

In 2010, a young woman from Ontario staged a robbery that killed her mother and injured her father. She was convicted of murder and attempted murder and received a life sentence.

Murder, deception and suitcases at sea. Why did Melanie McGuire murder her husband Bill McGuire? And what is her life like in prison?

Munchausen by proxy is more common than you think. Experts reveal the truth behind this form of medical child abuse.