The terrifying true stories that inspired your favorite horror movies

"The Exorcist." Warner Bros. Horror films have produced some of the most iconic figures in pop culture. But not all scary movies are completely fictional; some are actually based on real life. "The Conjuring" was based on the real-life Perron family in Rhode Island. Horror movies are reliably successful at the box office — just look at "Obsession" and "Backrooms"...