"This book addresses a puzzle in policing: Honesty and good faith are important to the police institution, but so are deception, dishonesty, and bad faith. Drawing on legal and political philosophy-as well as empirical data and cases studies-the book examines how cooperative relations steeped in honesty and good faith are a necessity for any viable society. This is especially relevant to the police institution because the police are entrusted to promote justice and security. As with other state institutions, the police institution is supposed to be based on legitimacy. Legitimacy is a function of authority, which is grounded in reciprocal public relationships generating rights and duties. Despite the necessity of societal honesty and good faith, the police institution has embraced deception, dishonesty, and bad faith as tools of the trade for providing security. In fact, it seems that providing security is impossible without using deception and dishonesty during interrogations, undercover operations, pretextual detentions, and other common scenarios. The book addresses this puzzle by showing that many of our assumptions about policing and security are unjustified given fundamental norms of political morality regarding fraud, honesty, transparency, and the rule of law. Although there is a time and a place for the police's use of proactive deception and dishonesty, the book illustrates why the use of such tactics should be much more limited than current practices suggest-especially considering the erosion of public faith in the police institution and the weakening of the police's legitimacy"--