"The first duties of the officers of the law are to prevent, not to punish crime. It is not their duty to incite to or create crime for the sole purpose of prosecuting and punishing it. * * (I)t is unconscionable, contrary to public policy * * *."
- Judge Walter Sanborn
Butts v. United States, 273 F. 35, 18 A.L.R. 143 (8 Cir. 1921)