the barcode proved that castillon bought them. castillon bound the women with tape and gagged them with washcloths he stole from work. one of the girls kicked the rear windshield and broke it. a shard of glass stuck to her leg. after the murders, when he dragged the women into the grass, he left a bloody fingerprint on cami kellerman's thigh. when he drove away, he left his tire impressions in the soft mud. >> i can't even begin to imagine. i really don't want to imagine. they probably went out and decided they were going to get high and party a little bit. she just got in the wrong car. >> i think they were friends, and at one point, they were picked up together. and one saw the horror of the other one dying. >> evidence technicians working fast and in difficult conditions performed a minor miracle by retrieving a print from the victim's skin. later, computer technology enhanced the print and proved jose castillon was the killer. the tire impression, too, was an almost perfect specimen. >> i think that if you tried 1,000 times to