blood on marie's saab, but at the time of marie's murder, dna analysis was still in its infancy. those samples had never been tested. in 2004, detective seyler called john lewin, a prosecutor with the l. a. da's office major crime division. lewin specializes in cold cases. >> they had collected originally the fingernail scrapings. they had collected the blood, and the detective had been unable to get the lab test it. so when i first got on the case i started trying to cash in favors at the crime lab to get it done. >> but a ten-year-old cold case was not a priority. three more years passed before those samples were tested. finally in november, 2007, the fbi crime lab came through. >> what we got was the information that would break this case wide open. >> a new clue triggers a bold