>> my name is lars itzo. oh, man. >> what do you make of this tone from lars?set about what he's done. >> i thought he was having more of an aw, shucks moment. >> but, within moments, lars became frantic. hyperventilating. moaning. the question. was it for real? >> the way he switched up emotions from when he starts doing cpr, it sounded a lot like mouth breathing. >> to me, it soundacting. >> on the 911 call, he set the scene this way. >> i don't know what it was. i just seen light and i heard movement. i thought she was right next to me when i got up out of bed. >> reporter: to responding officers, he changed the order of events. telling him he saw that light, after he got out of bed. >> i got to the doorment i see a flav of light coming from the front of the house. >> and lars added various, new details to his story. >> i heard the dog growling. >> reporter: in his interview down at the station, lars revised his story, again. that's when he said he woke to the front door squeaking. and offered, for the first time, this description of how he realized he'd sho