This may be technically correct, but if Zimmerman started the fight there will be very little sympathy for him by anyone. Trayvon might have been a very bad person, but it is very likely he was just some dude walking home (according to the evidence) when he got accosted by Zimmerman. Anyone winding up dead in this situation will get the sympathy.
There are no witnesses to the start of the fight.
We will never know who started it.
There’s no way to tell who started it.
So that bit of info will play no part in the case.
GZ is the only one with strong signs of being beaten up.
GZ has to be proven guilty beyond a reasonable doubt.