Martin didn’t retreat. He was on top of Zimmerman beating him, Zimmerman shot him (although he didn’t realize it for a few seconds) and then Zimmerman rolled Martin off. Not knowing at that instant that Martin was shot, Zimmerman tried to subdue Martin.
So Martin didn’t retreat, and Zimmerman didn’t exactly fling himself anywhere.
That’s what Zimmerman said, and it is consistent with what he says about the fight..
Martin did not give up of his own volition. He continued the attack as long as he was physically able to do so. And Martin was on top of Zimmerman - Martin had every opportunity to end the conflict.
And the distinction is irrelevant - Zimmerman could not give anyone the opportunity to retreat if that someone was sitting on his chest bashing his head on the ground.
And a reasonable person would note that Zimmerman did not shoot again, even though he was not sure Martin was hit. The instance the beating ended, so did the shooting, as well as the screams for help from Zimmerman.
Again, Martin conceded nothing. He continued the beating as long as he was physically capable of doing so - in other words, until Zimmerman shot him.
Which backs up Zimmerman’s story - there was a crazy person on top of him beating his head on the ground, in response to a simple question. And that crazy person was not going to stop until Zimmerman was dead or injured. Nothing was going to stop him except deadly force - not begging, not screaming for help.
Well, no - Martin could always have chosen to end the assault, or not attack Zimmerman in the first place. That would have ended it just as cleanly as shooting him.
Because, as mentioned, the fight was over the instant Martin stopped attacking Zimmerman. Even though Zimmerman did not (allegedly) know he had shot Martin once, he refrained from firing a second shot. The use of deadly force ended immediately. Zimmerman allegedly tried to use non-deadly force, to ensure that the attack would not resume (and, possibly, to restrain Martin from fleeing until the cops arrived a few seconds later), but as far as shooting him again, as you seem to want to believe Zimmerman was eager to do - nope, didn’t happen.
Regards,
Shodan