According to legend, Halloween began as the night when spirits of the dead hunt for bodies to possess. In order to avoid becoming possessed, people left out food or wore disguises, and this turned into our current custom of trick-or-treat. It is no wonder then, that real life crimes increase on this night, and demons come out in force. Today's guest, Lisa Collier Cool, is the author of the bestselling book, Deliver Us From Evil, which became a major motion picture. It is based upon the investigations of haunted houses and cases of demonic possession of her co-author, Ralph Sarchie, a New York City police Sergeant who moonlights as a demonologist. The book begins with one of the spookiest cases, the case of the Halloween Horror. Ms. Collier Cool is the bestselling author of six books and winner of 19 journalism awards, after writing more than one million words for America's leading magazines, newspapers and websites.