the case of barbara walsh was virtually identical.er laundry and had left the door open while she went downstairs. like the first it crime, parker used materials he found inside the apartment. after the sexual assault and mush der, he used the towels in the bathroom to clean um before setting the fire. in the folded towels, one hair with the root in tact survived the intense heat, smoke, and flames. a tiny hair found with the help of an angry girlfriend intent on getting revenge. investigators think the motive for parker's crimes was in part his anger and resentment towards his girlfriend, princess gray. >> he had a lot of pent-up anger to princess, who was dominant, extremely difficult person to deal with. and i suspected that contributed to the release of this sexual deviancy that we see in the murders. >> after a four month trial, robert parker was convicted of two counts of aggravated murder and sentenced to life in prison. his crimes were planned, all the way down to his attempts to destroy the evidence. but science uncovered evi

barbara boxer. >> what we do is we say we're keeping this in the military but we are allowing the experts to make the decision. >> reporter: military veterans in the senate were split. senator john walsh of montana voted yes. senator john mccain of arizona voted no. >> because if you take the responsibility from that commanding officer, then you are eroding his ability to lead. >> reporter: and that is the argument that won the day, though gillibrand vowed to try again. >> many people said to me, kirstin, i'm going to watch this, if it doesn't get better in the next six months, i'm with you next time. >> reporter: this was a victory for the pentagon's top brass which had argued vigorously against the measure. the senate is poised to pass a bill next week that would make some smaller changes, like giving military prosecutors more influence, scott, over military commanders when it comes to deciding which sexual assault cases goes forward. >> pelley: nancy, thank you very much. we mentioned the army's top prosecutor for sexual assault is himself accused of sexual assault tonight. the newspaper "stars and stripes" broke the story, and david martin has details. stripes" broke the story, an