the case of barbara walsh was virtually identical. she, too, was doing her 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