"What I want is an off-the-shelf sex partner," Leonard Lake confessed in one of his home videos. "Slave. There's no way around it."

Mild-mannered Ronald Dominique was overweight with a heart condition and a cane. He moonlit as a bad Patti LaBelle impersonator at the local gay club — and murdered dozens of homeless men.

Legendary samurai warrior Hattori Hanzō, known as "Demon Hanzō," fought like hell to make sure his clan ruled over a united Japan.

"She had great respect for [Adolf]," said one man who spoke with Paula Hitler in 1959. “Had I asked her about anything that might’ve been critical of him, I think she would've protected him."

Just days before the Tate-LaBianca murders, a musician named Gary Hinman opened his home to members of the Manson Family — and was brutally murdered for it.

Ted Bundy was a murderer and a sociopath, but he was also on the honor roll at the University of Washington.

Ted Bundy's childhood was a troubled one. He never knew who his biological father was, though some rumors claimed that it was his own grandfather through incest.

Ted Bundy's mom defended him to the bitter end, saying "You'll always be my precious son."

A year before Sharon Tate was murdered, Charles Manson was living in quiet anonymity, making music in the home of Beach Boys drummer Dennis Wilson.

In 1968, the Manson Family moved into George Spahn’s dilapidated Southern California ranch. The next year, they committed mass murder.

Why Vercingetorix was Julius Caesar's arch-rival and is still regarded as a national hero in France to this day.