CNN Forensic Files July 12, 2014 07:25:00
Maryland, which they thought he would voluntarily give his dna to prove he had not been involved in the fight. >> and we were not leaving easton, maryland, until we got his dna. >> this proved to be harder than investigators anticipated. denny smoked during his interrogation but always made sure to keep the cigarette butts. detectives offered him a bottle of water, but he wouldn't touch it. finally, they asked him to sign a document saying he refused to provide his dna. >> we asked him to put the letter into envelope and seal the envelopes. he refused to seal the envelopes and basically told u...