in addition, linda parisi claimed there was no motive, no reason for paul moore to kill roberto ayalament's investigation, they could not come up with anyone who said, i heard paul moore 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 screed. what did i do wrong to be treated this way? i think my dad really thinks i'm stupid, he's 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. >> when "dateline" continues. ins ♪ >>> for much of his life, paul moore had found ways to charm the folks around him. get away with bad behavior. at his trial here in sacramento, paul's defense attorney followed what was by now a familiar script, she accused of peter of murdering roberto ayala. >> peter moore has a life time of making