>> reporter: the defense theorized that tate entered the trailer through an unlocked door and shot lisa for revenge. the key defense evidence that suggested an intruder was a stray peanut butter and jelly sandwich in a baggy left on the back deck. >> there was a sandwich that would not have been there the night before that was there. >> reporter: critters should have devoured it, he argued. he told the jury it must have the killer's snack. >> i believe it to be the most compelling piece of evidence in the whole case. >> reporter: it was now up to a jury to decide, but it wouldn't be easy. coming up -- in the jury room, deliberations and drama. >> he started pounding on the door, want -- saying he wanted out of there, and we were in tears.