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Harvey Schlossberg (January 27, 1936 – May 21, 2021) was an officer with the New York City Police Department (NYPD), Freudian psychoanalyst, and the founder of modern crisis negotiation. He founded the Psychological Services department in the NYPD, where he pioneered treatment for violence-prone police. In the Handbook of Police Psychology, Schlossberg was called a "father of modern police psychology" for his role in changing the tactics police employed in hostage situations.