this one is by charlie melancon, it's against david vitter and it actually includes a re-enactment of visit with a prostitute. tom foreman has been looking at it perhaps in a dark room somewhere and joins us now keeping them honest. >> reporter: when a candidate says his latest commercial will air only during age appropriate shows, you know you're in for something special, and charlie melancon does not disappoint with his attack on republican senator david vitter. maybe you forgot vitter was caught up in a prostitution scandal or that he stood by his wife in this very uncomfortable news conference in 2007 and apologized for a very serious sin. but representative melancon wants to make sure you remember. >>> this time on forgotten crimes, caught up with prostitution scandals in washington, d.c., and new orleans, a louisiana politician has been let off the hook. today we explore the case of the senator and the madam in lawmaker, law breaker. >> reporter: this is a rarity in political ads. not only is it dressed up to look like one of these true crime shows out there but it's also two mi