Slender Man was a popular internet legend created in June 2009. But when two 12-year-olds tried stabbing their friend to death, this mythical creature took on a life of its own.

Before linking with neo-Nazism, skinhead culture started out as an alliance between young English and Jamaican working-class communities in 1960s London.

From the unhinged crimes of Jeffrey Dahmer to the sickening murders of Jack the Ripper, read about some of the worst serial killers in human history.

After Jimmy Savile's death in 2011, an investigation into sexual abuse allegations against the TV personality revealed at least 500 victims — some of whom were just two years old.

Throughout early 1800s Delaware and Maryland, Patty Cannon and her murderous gang kidnapped as many as 3,000 Black Americans to sell into bondage in the South.

On July 9, 1993, Toronto lawyer Garry Hoy was doing his favorite party trick: hurling himself at his office's windows to show their strength. But this time, his stunt failed.

After Lady Moody became the first woman to found a settlement in the New World in 1645, she then established one of the first “grid systems” in what would later become New York City.

Scotty Bowers was a gas station attendant in Hollywood when a famous producer solicited his "services," launching an illustrious career as the sexual fixer to the stars.

Thelma Todd was one of early Hollywood's brightest stars — until she was found dead in 1935. Although her death was ruled a suicide, many believe she was actually murdered.

When Mercy Brown's family started dying off one by one, the town blamed her — even though she'd been dead for months.