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.

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 spoke with legendary FBI profiler John Douglas about how a childhood injury may have pushed Joseph Paul Franklin to serial murder.

For seven years, 20-year-old Colleen Stan was held captive and locked in a small, coffin-like box under Cameron and Janice Hooker's bed. What came next was a misery of unspeakable depth and duration.

Eddie Seda, Matthew Milat and Michael Madison are just a handful of killers who claim to have been inspired by other killers.

A popular theory claims three childhood behaviors—animal cruelty, fire setting and persistent bedwetting—can indicate a serial killer in the making.

There have been many high-profile crimes over the years, but only a fraction have been successfully translated into film. What does a true crime need to make it into the silver screen? Crime author Harold Schechter on what makes for good true-crime movies.

Professors Bryanna Fox and Edelyn Verona of the University of South Florida are leading a project that evaluates all inmates that come through the Pasco County jail to compare people who are arrested for domestic violence to people arrested for burglary to people arrested for murder.