Office of Special Investigations (United States Department of Justice)
The Office of Special Investigations (OSI) of the U.S. Justice Department was created in 1979 to identify and expel, from the United States, those who assisted Nazis in persecuting "any person because of race, religion, national origin, or political opinion." This involved gathering, verifying, and presenting in court eyewitness and documentary evidence of decades-old crimes. The evidence was incomplete and scattered around the world.