nevertheless, analyst brian higgins examined the socks with light sources that cause genetic materialuoresce. >> i was kind of like, wow, could these be semen stains? i was kind of surprised, actually, because it's not one of the more common places we would find semen. >> the areas were removed then analyzed with a new dna test that needed only a very small amount of genetic material. miraculously, the tests generated a mixture of two dna profiles, one female and one male. one was julie's dna. the other was the dna of the killer. >> they were able to identify that dna profile as the exact match to james elmen. >> we were all ecstatic. i mean, it was an unbelievable feeling. and that's the reward of cold case, when you have that piece that you never had before and you're able just to put that one thing together, and, you know, you've got the entire case. >> investigators confronted elmen in prison with the evidence. >> and i'm telling you that your dna, that your semen, is in the murder scene of this murdered girl. >> i'm telling you i wasn't there. i don't know anything about this gir