This important new book provides materials and analysis for law school classes on policing and the law. It offers a resource for students and others seeking to understand and evaluate how American law governs police interactions with the public. The book provides primary materials, including cases, statutes, and departmental policies, and commentary and questions designed to help readers explore policing practices; the law that governs them; and the law's consequences for the costs, benefits, fairness, and accountability of policing. Among other issues, the notes and questions encourage readers to consider the form and content of the law; how it might change; who is making it; and how the law affects policing. Part I introduces local policing--its history, its goals, and its problems; Part II considers the law that regulates criminal investigations; Part III addresses the law that governs street policing; and Part IV looks at policing's legal remedies and reforms.