Authoritative and insightful, this one-stop resources provides historical and contemporary perspectives on ideological extremism in law enforcement, as well as its wider impacts on American society.A mix of narrative overview, biographies, essay perspectives, and a helpful guide to other resources to facilitate understanding of the contemporary problem of extremism in American law enforcement. Written by experts in the criminal justice field, the authors draw from various sources to highlight for the reader the extent, motivations, causes, and dangers of ideological extremism in the ranks of America's police, from the smallest towns to the biggest cities. In addition, it discusses reforms that have been proposed-and in some cases implemented-to combat the problem, including measures introduced in other countries.Providing wide-ranging, even-handed, and comprehensive coverage, this one-stop resource contains everything students need to know to understand the issue's many dimensions-as well as the ramifications of extremism in the police ranks of the American communities that police officers are sworn to serve and protect.