Acts of terror on a global scale are straining to the breaking point the due process guarantees of the legal systems of modern democracies. In unequalled breadth and depth, this book analyzes the rights of persons suspected of a crime, in normal times and emergencies, from the pre-trial phase to the trial and the post-trial period under all the universal and regional human rights treaty regimes, pertinent customary international law, general principles of law, international humanitarian law as well as the hybrid procedures developed by international criminal tribunals. The book then presents a detailed analysis of United States’ due process guarantees, in peacetime and in war, and the executive, legislative and judicial responses to the attacks of September 11, 2001. Professor Pati appraises the American actions in terms of international law’s due process guarantees and proposes courses of action which can better defend a public order of human dignity.