the slashed window screen. >> they didn't do any testing to exclude other sources for that particular fiber or even to pin it down, really to the screen and only the screen. >> the bread knife had been dusted for fingerprints with the brush that raised questions for cooper. >> my experts tested seven random fingerprint brushes and four of them had the same chemical consistency and appearance as this one fiber that was found on the bread knife. >> it is typical in a criminal case that the defense is not satisfied with the state's case. so if there was any dispute, certainly you would have heard from that evidence. >> if the defense had any experts, where were they? where are they? why aren't they speaking out? >> the d.a. at final argument says, ladies and gentlemen, the state didn't put up any evidence to contradict. so the only evidence before you is what our experts said.