david! ♪ ♪ ♪ ♪ please, humans first. behold the future. i'll...come back. the veil intelligent toilet, by kohlerresto, seresto, seresto whatever your dog brings home to you, it shouldn't be fleas and ticks. seresto gives your dog 8 continuous months of flea and tick protection in an easy-to-use, non-greasy collar. ♪ seresto, seresto, seresto oh no, jake. seresto. 8-month... ♪ seresto, seresto, seresto >> whitaker: jailhouse lawyers are prisoners who manage to learn enough about the law while incarcerated to help themselves and other inmates with legal problems. we get letters from them every week. tonight, we are going to once again introduce you to shon hopwood, who is arguably the most successful jailhouse lawyer ever, having had one of his cases argued before the u.s. supreme court while serving a 12-year sentence for armed bank robbery. since his release, he's built a resume as a legal scholar, and been published in top law journals. we met him at one of the nations premier law schools, where he's become its newest professor, and as steve kroft first told you in october, it's a tale of redem