This document provides an overview of the development of policing models in the United States. It discusses the English origins of American policing and how early colonial institutions such as sheriffs, constables, and night watches evolved into modern police forces. It highlights the creation of the London Metropolitan Police in 1829 as establishing the foundation for modern professional policing, with its focus on preventative patrols, visible community presence, and quasi-military command structure. This model then influenced the development of American policing.