Dr. Peter Langman is a psychologist whose research on school shooters has received international recognition. His book, Why Kids Kill: Inside the Minds of School Shooters, was translated into German, Dutch, Finnish, Russian, and Serbian. His work has been cited in congressional testimony on Capitol Hill and he has been interviewed over 600 times by media outlets in 35 countries. After the Sandy Hook attack, the CEO of the American Psychological Association presented Dr. Langman’s recommendations on school safety to President Obama. He has presented at both the FBI Headquarters in Washington, DC, and the FBI National Academy in Quantico. He has been an invited speaker at the National Counterterrorism Center and was hired by Homeland Security to train professionals in school safety. His book, School Shooters: Understanding High School, College, and Adult Perpetrators was published in 2015. From 2018 to 2023 , Dr. Langman was a researcher with the National Threat Assessment Center of the United States Secret Service. His latest book is Warning Signs: Identifying School Shooters Before They Strike. In 2025, Dr. Langman became the Senior Advisor on Violence Prevention at ZeroEyes.