no reason for paul moore to kill roberto ayala. >> for all of law enforcement's investigation, they coulde say he wanted to hurt roberto. >> reporter: no. but they did find this document on paul's computer titled "my life" a rambling, self-pitying scred. what did i do wrong to be treated this way? i think my dad really thinks i'm stupid. he is always saying how smart robert is. but ultimately the trial came down to a single sheet of blank paper. almost like a rorschach test for the jury. what would they see, paul moore's guilt or a plot to frame him? coming up, a verdict that will divide this tight knit town and rip apart this family all over again. >> we started crying. we made usaa insurance for members like martin. an air force veteran made of doing what's right, not what's easy. so when a hailstorm hit, usaa reached out before he could even inspect the damage. that's how you do it right. usaa insurance is made just the way martin's family needs it - with hassle-free claims, he got paid before his neighbor even got started. because doing right by our members, that's what's right. usaa.