Peter Langman is director of psychology at KidsPeace (www.kidspeace.org), an organization that helps kids overcome emotional crises. Winner of the Pennsylvania Psychological Association's 2008 Psychology in the Media Award, he has over 20 years of experience treating at-risk youth, specializing in kids with homicidal tendencies. He has appeared on CBS, BBC, and CBC. He is the author of a number of works on mental health.