Ralph Sarchie's life is divided between two very different worlds. In one he's a decorated sergeant for the NYPD who proudly protected and served his city for 18 years. In the other world he's a highly regarded demonologist, battling evil at the source and helping those who have nowhere else to turn.

A new featurette delves into the real story behind Ralph Sarchie, who's life's work comes to the big screen in the new thriller Deliver Us from Evil. Watch and learn how this real police officer teamed up with a priest to study and solve a series of mysteries that delve deep into true demon possession.

Ralph Sarchie takes viewers into a world beyond Hollywood, where anything can happen, and evil is real. In theaters this summer.

A New York police officer Ralph Sarchie (Eric Bana), struggling with his own personal issues, begins investigating a series of disturbing and inexplicable crimes. He joins forces with an unconventional priest (Édgar Ramírez), schooled in the rituals of exorcism, to combat the frightening and demonic possessions that are terrorizing their city. Inspired by the book, which details Sarchie's bone-chilling real-life cases.