Why Kids Kill: Inside the Minds of School Shooters

In the late 1990s, a terrible mass killing took place at the Columbine school, shocking the whole world. Since then, incidents of shootings at schools have become more and more common and have spread beyond the United States. Clinical psychologist Peter Langman analyzed records from blogs and diaries, and also listened to testimonies from classmates and teachers about the school shooters in an effort to understand the reasons why children resort to killings.