Malevolence or "monster" obsessive-compulsive disorder (OCD) includes obsessions about hurting other people.  Licensed psychologist Seth J. Gillihan PhD gives us more info about malevolence OCD, including treatment. Dr. Gillihan is a clinical assistant professor of psychology at the University of Pennsylvania.  His books include Overcoming OCD: A Journey to Recovery. His website is www.sethgillihan.com.  Talking Brains is hosted by Stephanie Sarkis PhD. www.stephaniesarkis.com