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 ...

Society is fascinated with the phenomenon of serial killers, with true crime shows and podcasts having surged in recent years. In 2022, Dateline NBC a popular true crime show averaged 3 million ...