bill fitzpatrick is a bulldog. once he sinks his teeth into something, he doesn't let go. >> chuck keller is trying his first murdersay, "she did this to me." that's not an easy spot for a defense lawyer to be in. >> you will decide that the wrong person is sitting in that chair. >> so the trial begins, and the d.a. has taken the move, the bold move, to put the daughter ashley on the stand as the first witness. >> put your left hand on the bible, raise your right hand. >> he starts off by establishing her as somebody the jury likes, as really a tender-hearted teen girl. >> i want to ask you about the day your dad died. >> here's this 20-year-old remembering what it was like to see her father lying on the couch and essentially dying in front of her eyes. >> i saw him take and lift his arm up, and then he made a breath, and then he didn't move again after that. so i thought he was just sleeping. >> as she tells her story, he slowly leads her to the moment she takes a swallow of the drink offered to her by her mother. >> she came home and she was like, "let's get drunk. let's get just totally drunk." >> police believe