The Exorcist 3: Legion

After the death of a friend.father Damien Karras, Lt. Kinderman and Father Dyer try to get cheer up by going to watch Damien's favorite film It's a Wonderful Life. However, Father Dyer is soon found dead in a church with the words "IT'S A WONDERFULL LIFE" written on a wall in his blood. Lt. Kinderman steps directly into an investigation for a serial killer to bring him to justice and avenge his friends.