The Fourth Edition of this casebook offers instructors an effective problem-based casebook that provides maximum pedagogical freedom to craft an exciting course that engages students via creative use of case excerpts, substantial portions of must teach seminal cases, provocative notes, scholarly works, cross-disciplinary essays, practice pointers, and over 175 illuminating problems. Building upon the strengths of the earlier editions, the Fourth Edition features new and significant developments in the law, explanatory commentary, updated chapter checklists, and fresh problems sprinkled throughout the text. The Fourth Edition specifically addresses both traditional and post-9/11 constitutional criminal procedure issues regarding search, seizure, interrogation, confessions, lineups, effective assistance of counsel, torture, and the risks of wrongful governmental conduct and remedies.