liam mcatasney, himself. >> i planned this thing out for like six months. >> a hushed courtroom, urged the word, disturbing doesn't begin to describe. >> so you just count up -- just without working? >> she was like screaming in? >> here, in anthony's car, liam told the whole sickening story of what he did to sara on december 2nd. they were alone in her house, that afternoon when liam crept up from behind then grabbed her. >> i pretty much hung her, like -- i just, a picture up and then i had her dangling off the ground. and then she said my name and that was. it and then it took me half an hour to kill her. i thought it was going to be able to track her out and have her out in like a couple of minutes. that's the only time i had my phone. who and it took me like a half an hour after i hit start. on the time. >> you heard that right, liam used his phone to time how long it took for sir today. she was helpless. not even her faithful buddy intervened. >> her dog laid there and watched as i killed her. didn't do anything her [bleep] dog. >> what kind of dog? >> yeah, what kind of dog is t