"Our government is the potent, the omnipresent teacher. For good or ill, it teaches the whole people by its example. Crime is contagious. If the government becomes a lawbreaker , it breeds contempt for the law; it invites every man to become a law unto himself; it invites anarchy. To declare that in the administration of the criminal law the end justifies the means...would bring terrible retribution. Against that pernicious doctrine this Court should resolutely set its face.” [Justice Brandeis, Olmstead v. United States, 277 U.S. 438, 485. (1928)]