Discover the 10 most notorious serial killers in history, including Ted Bundy and Ed Gein. Explore the people who left a legacy of fear.

When a young woman became pen pals with one of the UK's most prolific serial killers, Dennis Nilsen, she never expected how close she would eventually become to the murderer ...

New York's most prolific known serial killer offered some theories about the identity of the state's most recent serial killer today, as news broke that the culprit had reportedly confessed to the ...