This document provides an overview of the history of policing in America from the colonial era to present day. It discusses how the earliest forms of law enforcement included sheriffs, constables, night watches, and slave patrols. The first modern police departments were formed in the 19th century in response to urbanization and immigration. Early police forces were politically influenced and unprofessional. The professional era began in the early 1900s with reforms advocating higher education and specialized units. New technologies like patrol cars and radios were adopted. Current issues include changing officer demographics, discretion control, community policing, and problem-oriented policing.