Matthew Guariglia, author of 'Police and the Empire City: Race and the Origins of Modern Policing in New York', explores the history of the New York Police Department and its entanglement with race, ethnicity, and whiteness. Topics discussed include the origins and evolution of policing, diverse policing tactics, efforts to diversify the police force, interesting anecdotes from the history of policing in New York City, and the history of state power and information.