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Peter Langman
Dr. Peter Langman is the Director of Research and School Safety Training at Drift Net, LLC, and a researcher with the National Threat Assessment Center of the U.S. Secret Service.Dr. Peter Langman is the Director of Research and School Safety Training at Drift Net, LLC, and a researcher with the National Threat Assessment Center of the U.S. Secret Service.
Buku oleh Peter Langman
Warning Signs: Identifying School Shooters Before They Strike