But Who STARTED The Altercation Between Martin and Zimmerman?

Isn't that the important question in a Self-Defense Justification?

Yes, it sounds like Martin was winning the fight based on the closest witness account.

But that provides absolutely no insight into who threw the first punch. Who began the altercation.

And I haven't heard/seen any evidence that suggests that question has been answered. (Although, I'm not able to keep such a close eye on this case)

Zimmerman could've swung first and then proceeded to get his ass whipped by a scared kid who didn't let up (even when he started to cry for help).....because some weird guy was following him on car, by foot, then verbally confronted him and then (possibly) physically confronted him.

If some guy did that to me (at night, nonetheless)....and I had the physical upper hand; no way I'm gonna back down because I'm scared to death of this psycho how has been tracking me...

So....if it remains undetermined who actually started the fight.....how does that affect the chances of a conviction?