This new edition of the classic casebook contains detailed and authoritative commentary, extensive discussion of practical problems, highlighted treatment of selected recent lower court cases, full consideration of Supreme Court cases and questions that challenge the conceptions and analytical powers of law students. New features include the addition of more headnotes; full case treatment of important new Supreme Court cases; and consideration of how Bill of Rights protections have been affected and limited in the aftermath of 9/11. The new edition also includes additional scholarly commentary on such topics as the exclusionary rule, Miranda, and jury nullification; detailed discussion and scholarly commentary, on race-based stops and encounters; and an extensive updated section on how the Sentencing Guidelines operate after Booker.