Unknown recordings reveal how journalist Laura Greenberg befriended serial killer Doug Gretzler, visiting him 350 times. Her ...

There are entrepreneurs, and then there are serial entrepreneurs. Take a look at who they are and how they keep making it big ...

H.H. Holmes is believed to be the United States’ first known serial killer. In 1886, Holmes, whose original name was Herman ...

Serial murder is neither a new phenomenon, nor is it uniquely American,” reads a public report from the FBI on the subject.

(CNN) -- For decades, criminologists and true crime documentaries have attempted to understand what causes serial killers to commit the atrocities they do. Dennis Rader, John Wayne Gacy, Jeffrey ...

More than 400 years after her death, the truth about "the Blood Countess," a Hungarian noblewoman alleged to have been the most prolific female serial killer of all time, remains elusive. From her ...

Nearly a decade ago, reporters Sarah Koenig and Dana Chivvis set out to tell a different kind of story about Guantánamo Bay, the prison and court created by the US shortly after 9/11, intended to ...