Policing Law is a rigorous examination of the legal architecture of U.S. policing: who has the power to police, how that power is exercised, and how law constrains and remedies its abuse. We move from sources of authority (constitutional, statutory, and administrative) to the doctrines that govern surveillance technologies, stops and searches, interrogation, protest management, and the use of force, and then to accountability: suppression practice, civil liability under § 1983 and qualified immunity, Monell and municipal liability, state-law claims, and federal pattern-or-practice enforcement. Along the way, we will address contemporary controversies from data-driven surveillance and body-worn cameras to intergovernmental task forces and federalism disputes to illuminate the stakes of doctrine and the institutional choices that shape transparency, oversight, and public safety. Students will write an original research paper that may satisfy the Upper-Level Writing Requirement.