prosecutor linda tally smith knew she didn't have a perfect case.ingerprints, no dna. so, she told jurors they wouldn't hear about any smoking gun, but they would hear david dooley's own words, which had made him the last man standing in the detectives' process of elimination. >> it was through this process, that the path kept turning back to one person, the defendant david dooley. >> reporter: jurors heard that almost all the employees working on the morning of the murder were on the warehouse floor, far away from the upstairs office area where michelle was killed. they were eliminated as suspects. >> we were able to create a time record of where everybody was, and what they were doing at different points during the morning. >> and where was david dooley? >> there's the red pick up truck. >> reporter: the jury got to see dooley on security video from that morning. >> the defendant actually left the building that day at 6:31 a.m., which was about a half an hour after michelle walked into the building. >> reporter: the prosecutor showed the jury a ph