Indeed, Zimmerman would have had no reason to throw the first punch. If you are armed, you don’t get into a fist fight. There was a reason Trayvon would throw the first punch. Whether he was up to no good or not, he did not like it that he was being followed.
And ultimately if this prosecutor does not have evidence that Zimmerman threw the first punch, she is as Levin, McCarthy and Dershowitz guilt of misconduct.