This Comment will briefly outline the investigative procedures available under current United States domestic law for suspected LOAC violations. Formal and informal procedures available under both civil and military justice systems will be explored. Investigative jurisdiction is often tied to prosecutorial jurisdiction and thus aspects of the latter will be presented to the extent required to understand the former. Special attention will be given to evidence that U.S. investigative procedures, policies, and protocols are influenced by or are functions of perceived international legal obligations. s Comment concludes by offering a few brief observations concerning the U.S. system and the likely direction of future scrutiny.