An authoritative resource for understanding modern law enforcement and its relationship with American communities, this volume addresses subjects including the legal underpinnings of various law enforcement actions and practices; the so-called militarization of police departments; the increased use of force and surveillance to combat crime and terrorism, and to generally "keep the peace"; and the perspectives of Black Lives Matter activists and other critics of American law enforcement. The entries provide readers with expert analysis of current topics related to the intensifying debate about the American police state; examine the scope of law enforcement issues that have existed for centuries, and explain why they continue to exist; and cover new mandates for exercising police power, enabling readers to critically analyze what is presented to them in the media. Included throughout the book are excerpts from important laws, speeches, reports, and studies pertaining to the subject of the use and abuse of police power in the United States.