Potent II

"Our government is the potent, the omnipresent teacher. For good or for ill, it teaches the whole people by its example. Crime is contagious. If the Government becomes a lawbreaker, it breeds contempt for law: it invites every man to become a law unto himself; it invites anarchy. To declare that in the administation of the criminal law the end justifies the means - to declare that the Government may commit crimes in order to secure the conviction of a private criminal - would bring terrible retribution. Against that pernicious doctrine this Court should resolutely set its face."

-Justice Louis Brandeis (Dissenting Opinion),

in Olmstead v. U.S., 277 US 438, at 485. (1928)