detectives matched the truck to its owner, david dooley, the janitor. ad found michelle's body. >> dave dooley's truck is seen leaving 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 odd that dooley hadn't mentioned that when they 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. >> i kind of figured it would happen just to do a follow-up. >> before detective mcvay even brought it up dooley told them he had gone home the morning of the murder. mcvay recorded their conversation. >> i came back in and i went back to fisher. >> you came back here. >> i came back here, yeah. i couldn't get ahold of my wife and i came home to make sure she was okay. >> yesterday you didn't tell me you left. why did you decide to leave? >> i didn't think about that. >> detective stall also questioned david's wife, jane