Possessed: The True Story of an Exorcism

For 40 years, the truth about the exorcism of 14-year-old Robbie Mannheim remained a mystery. Then a priest's diary, hidden in a locked room in the mental ward of a St. Louis hospital, came to light -- a diary written by one of the Jesuit priests who witnessed the bizarre and harrowing events firsthand.

Over the period of several terrifying months, the Mannheim family was caught in a titanic struggle while physicians, psychiatrists, and clergy fought for the soul of their child against a po...