More recently the U.S. Department of Justice’s Office of Special Investigations (OSI), which is responsible for prosecuting Nazis and collaborators alleged to have entered this country illegally, closed out an investigation of Poppe’s immigration to the United States without bringing any charges against him. This action was taken in part because the OSI determined that Poppe had disclosed his relationship with the SS to U.S. intelligence prior to his immigration, thus making it highly unlikely that the OSI could successfully prosecute Poppe for illegal entry into the United States.