Book excerpt: The Handbook of Police Psychology features contributions from over 30 leading experts on the core matters of police psychology. The collection surveys everything from the beginnings of police psychology and early influences on the profession; to pre-employment screening, assessment, and evaluation; to clinical interventions. Alongside original chapters first published in 2011, this edition features new content on deadly force encounters, officer resilience training, and police leadership enhancement. Influential figures in the field of police psychology are discussed, including America’s first full-time police psychologist, who served in the Los Angeles Police Department, and the first full-time police officer to earn a doctorate in psychology while still in uniform, who served with the New York Police Department. The Handbook of Police Psychology is an invaluable resource for police legal advisors, policy writers, and police psychologists, as well as for graduates studying police or forensic psychology.