Complex sentence: Burris responded to claims of Taser confusion by arguing that video evidence did not support the idea of Taser confusion and, in any event, Mehserle had no reason to fire his Taser.
Split into simpler sentences: Burris responded to claims of Taser confusion by arguing that video evidence did not support the idea of Taser confusion. In any event, he said, Mehserle had no reason to fire his Taser.