His previous book, Why Kids Kill: Inside the Minds of School Shooters, was named a Choice Outstanding Academic Title and was translated into German, Dutch, and Finnish. Langman's research has been cited in congressional testimony on Capitol Hill and thousands of news outlets. He has been interviewed by the New York Times, CBS-TV, Fox, CNN, the BBC, and over 150 other news outlets in the USA, Canada, Europe, Asia, Australia, and the Middle East. Langman has trained thousands of professionals in education, mental health, and law enforcement on identifying potential school shooters. He maintains the largest online collection of materials relating to school shooters at schoolshooters.info. He is in private practice in Allentown, PA.