congress while victims wait and sexual predators walk the streets. it is a frustrating and infuriating example of how congress was continually walking by and is the latest installment of our ongoing series, why won't washington work? >> i will sentence you to 47 years to the department of corrections. >> reporter: this serial rapist was just sentenced to prison for sex crimes but he could have been caught decades ago if dna from a 1988 rape had been tested sooner. >> you have demonstrated a pattern of identifying, targeting vulnerable young women. >> reporter: think of all the more recent victims that could have been protected. >> when he threw me on the bed and he was raping me, my son had a plastic bag and was hitting him. >> reporter: his dna was found in at least 1 of 11,000 untested