detectives matched the truck to its owner, david dooley, the janitor. of the workers who found michelle's body. >> dave dooley's truck is seen leaving the parking lot at 6:31 that morning. >> right after the murder? >> that's right. that's right. >> the security tape showed dooley returning to the warehouse around 7:00 a. m., detective mcvay thought it was not that he hadn't mentioned that when i first spoke. they needed to speak with dooley again, so they went to the apartment he shared with his wife, janet and dooley wasn't surprised to see them. >> a kind of figured it would happen, to do a follow-up. >> before detective mcvay even brought up, dooley told him he'd gone home the morning of the murder. mcvay recorded their conversation. >> i came back here, and then went back to fisher. >> you came back here? >> i can back here, yeah. i couldn't get a hold of my life, and i came home to make sure she was okay. >> yesterday you didn't tell me you left. why, you are just -- >> i didn't think about that. >> the detective also question david's wife janet se