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

Pedophile and cannibal Tsutomu Miyazaki, a.k.a. the "Otaku Killer," terrorized a Japanese suburb for one bloodlusty year before he was finally brought to justice.

"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'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.

In 1967, Albert DeSalvo confessed to sexually assaulting and killing 13 women. The cops thought they found the "Boston Strangler," but DeSalvo was never tried for the murders.

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.

In the '90s, Karla Homolka presented her husband with innocent young women to rape, torture, and murder. Today, she volunteers with elementary school children.

Aron Ralston — the man behind the true story of 127 Hours — drank his own urine and carved his own epitaph before amputating his arm in a Utah canyon.