dennis murphy: a hard drive. screamed over to the pattison house, where the recorder perched still untouched in the garage. what a video festival the detective was about to have. this is july second, 2009. this is looking from his garage to the side here. dennis murphy: the unblinking camera documented scott's run to the landfill at 5:00 am. then its motion detectors came alive again an hour and a half later as he got back home to hook up with dillon and his employee as they headed out to the job site. the camera was showing the same thing scott had previously talked to the detective about. so he's a good storyteller? good accounting of his day at this point? sure. dennis murphy: and then, scott's timeline went haywire. remember, scott had told the cops, he didn't get back to the house that morning till 11:30, just a few minutes before he came upon lisa in trouble. but what did scott's surveillance system have to say? a completely different story. who's the head? that was mr. pattison, scott pattison. no question