. >> in his interview down at the station, lars revised his story again. that's when he said he went to the front door squeaking and offered for the first time this description of how he realized he had shot debbie. >> during those interviews, lars appeared heart broken, at times falling apart. >> he was described as pacing in the blanket, he was mumbling, he was moaning. >> at various times, yes. >> is that not what a husband should do after something like that? it sounds normal. >> that's the thing, it sounds normal. right? when the detective looks at him. he doesn't tears, that doesn't jive with anything else. >> these bits of emotion are only done in front o. detective. they're not done when he's alone. >> what was he doing when