Back when I worked in the Criminal Division at DoJ, that motto reflected the operating ethos of the place.
Some state prosecutors apparently didn’t get the memo. Insisting on keeping innocent people in prison, at the sacrifice of any chance to find the guilty people, merely to save personal and organizational face? These people are a disgrace to their profession.
Update The original version, from Solicitor General Frederick Lehmann (Taft Administration), is “The United States wins its point whenever justice is done its citizens in the courts.” According to Seth Waxman, the motto is inscribed on the wall of the Attorney General’s rotunda in the DoJ building.