. >> reporter: back in college station, detective kenny elliott was working the case. >> anytime you have a killer out on the run it's frustrating. you want to catch the person responsible. >> reporter: one possible suspect that male friend jamie visited the night of her murder. he'd refused to give police a dna sample for testing. >> reporter: that's kind of odd, if he had nothing to hide. >> a lot of people will not give up dna. too much tv. >> reporter: but the detective had snagged a sample from a beer mug and when the dna finally came back, he was not a match. reporter: you felt confident that you could rule him out, based on -- >> yes. yes. >> reporter: the dna not matching? >> yes. >> reporter: but even before the dna test cleared jamie's friend, the detective was already looking for other suspects. and his attention quickly landed on someone very close to the victim. her boyfriend. >> the questions that they asked, focused on where was i the night before, what had i been doing. >> reporter: looking at you as a possible suspect? >> it didn't really occur to me that that was wh