"It is true, of course, that much uncertainty exists as to how rehabilitation is best accomplished. See Consuelo-Gonzalez, 521 F.2d at 264. Were that picture clearer, our criminal justice system would be vastly different, and substantially improved. By one estimate, two-thirds of the 640,000 state and federal inmates who will be released in 2004 will return to prison within a few years. The Price of Prisons, N.Y. Times, June 26, 2004, at A26. See Bureau of Justice Statistics, Dep't of Justice, Recidivism of Prisoners Released in 1994 (2002) (finding 67.5% recidivism rate among study population of 300,000 prisoners released in 1994). The cost to humanity of our ignorance in these matters is staggering."
U.S. v Gementera 379 F.3d 596, 604