Like Don Corleone, Frank Costello held power over politicians, refused to deal drugs, and survived an assassination attempt that came extremely close to ending his life.

The Annabelle doll that stars in the eponymous franchise is based on a real-life Raggedy Ann said to have terrorized a pair of young nurses before killing a man.

Before the horrors of Jeffrey Dahmer came to light, Larry Eyler targeted vulnerable young homosexuals across the American Midwest.

"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.

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.