and sure enough, he had written a check for beer. >> the check was written for $19.68 by jose castillonbout the white washcloths? castillon worked at a nursing home that used hundreds of white washcloths every day. >> they took us back into their laundry area. and we dug through and found washcloths from the same manufacturer, same description, same thread count. so we knew we had a link. >> prosecutors believed castillon probably picked up both victims at the same time. he was drinking, and carelessly discarded the beer cans. the barcode proved that castillon bought them. apparently, 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