class= nosel > that is it for us, thank you so much for watching. remember, if your friends are busy tonight, had a hot date, you and can watch the nightcap tomorrow night, saturday at 11:00. he s turn right here on msnbc. for now i am signing off and on that note i wish you a very good night. from all of our colleagues across the networks of nbc news, thank you for staying up late with me, i will see you tomorrow. i think back and i go, this was such a senseless murder. and why diane? why, when she was ready to start a brand-new life? i will never know that answer. spectacles kept coming. hi diane, it s 2:00, just making sure you are here today. at 2:00 it was too late. simone have killed her. we had her body at the scene, that was all. she had a fiance. they argued a lot. we had our ups and downs, no question. and a coworker with a crush. he was an odd character. i was always very spoiled lead to her. everybody was suspect. then the break. tips from
mixture that was consistent with a combination of diane holik and russo. reporter: was it enough to say for sure, though no. reporter: because dna no, we can t exclude him. it s consistent with him. but it s not the kind of dna that you can eliminate the rest of the world. reporter: right. just really increased suspicion is all. yes. it was helpful. it was not dispositive. reporter: and the hairs found on that wet towel left on diane s couch? we sent the hair off to a lab, and they did a mitochondrial dna test on the hair, and again we could not exclude mr. russo. reporter: you couldn t say for sure it was him. couldn t say for sure, no. reporter: so close, just not quite the absolute proof they d been hoping for. but the dna did provide one very helpful service. police had confirmed the alibis of diane s fiance dennis and her ibm friend ray, these tests