On Christmas Day, 1929, shots rang out from the Lawson family homestead near Germanton, North Carolina. Charlie Lawson had murdered his wife and six of his children. Hours later, he took his own life. What could motivate a man to commit such a terrible act?

Soon after he attempted to contact the other side, young Roland Doe was possessed by a sinister force. Sound familiar? That's because the real-life case of Roland Doe was the inspiration behind "The Exorcist." Eric and Clarissa analyze the exorcism of Roland Doe and the psychological horrors of...