was collected from the bodies of the victims killed back in the '80s. and so police had a dna profile of the killer. but they didn't have his face, they didn't have a name. and then suddenly, very recently, they were able to make a partial match. now it turns out that the suspect's son was convicted of a felony weapons charge. and his dna was in the system. and so using this familial dna search program, investigators came up with the partial match. they were able to take a closer look at the father. then they were able to collect his dna from actually picking up partially-eaten pizza out of his garbage can. they were able to run that dna and then bingo, they had their match, don. >> listen, tell me about this man. i understand he's a mechanic. and what i've been reading, people said, according to reports, that he frequents sex worksers and those sorts of things. but he was the guy next door. i'm sure no one thought he was a