we saw the picture of jack bokin who has been identified. how did she meet up with him and tell us about the scene? >> you know, on a bigger scale, this is similar to a 1,000-piece jigsaw pusle. you know,over time, you try to put a puzzle together and in the end there's a good chance you're going to be left with peels us don't know and that comes to play here where in the end we don't know exactly how they came in contact. we just know that unfortunately michelle came across this character. >> but the body, what you were able to tell, the way she fought. there was d.n.a. evidence to talk to us about what kind of d.n.a. evidence was left, how you came to discover it and then how you ultimately used it to link her to the killer. >> sure, by the courage of michelle, she gave us clues to help solve her murder and tell her story. i began. relieving this "cold case" file early last year and i think it was logical to attack the evidence and see what viable evidence we still had than be used to solve the case with current technology regarding d.n.a.