This is the first comprehensive study of the law governing professional misconduct by defense lawyers before the International Criminal Court (ICC). The ICC's regulatory regime was introduced in response to instances of misconduct experienced by other international and domestic criminal courts. The book first turns to how the ICC's forerunners - the International Criminal Tribunals for the former Yugoslavia and Rwanda, and the Special Court for Sierra Leone - coped with misconduct, often resulting in controversy. It also looks at the approaches which have evolved in Germany and the United States, reflecting the different role of defense lawyers in the civil and common law criminal justice traditions. It offers a unique insight into the professional responsibilities of defense lawyers within the various international and national regimes. Offering practical guidance on disciplinary systems and other sanctioning mechanisms, the book also explores the inherent tension at the heart of the defense lawyer's role: ensuring the human right to a fair trial and therefore anticipating that they will be zealous advocates for their clients, while, at the same time, expecting that they commit themselves as officers of the court. (Series: Studies in International and Comparative Criminal Law - Vol. 11)