Dr. Peter Langman is a psychologist and the author of three books on school shooters, including his latest: Warning Signs: Identifying School Shooters Before They Strike. He has presented at FBI Headquarters, the FBI National Academy in Quantico, and the National Counterterrorism Center, and has trained thousands of professionals in education, law enforcement, and mental health on preventing school shootings.

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Contact Dr. Langman and find his blog, books, school safety and prevention information and more at  schoolshooters.info