And Police video shows the injuries Zimmerman sustained, when we put that into the context of the narrative, there is a sensible conclusion. And it's not that Zimmerman just decided to shoot this kid, whom he'd already called the Police about, and then break his own nose, smash the back of his head against a pavement and fake a fight
And other eye witness testimony says he did have injuries, and Police video shows him with injuries.
In the context of the narrative it seems the most plausible explanation, looking at the character of the two people involved, the calls both made, the testimony and outcome.
I fail to see how you showing that there was a fight somehow makes Martin the aggressor/instigator. Thats the important point
Does it not seem odd to you that Zimmerman would go ahead and commit a crime after he's made Police aware of where he is, where Trayvon was, the fact that'd he'd been following him etc? Add that to the fact that the media have sought to crucify Zimmerman by totally misrepresenting the case, and well, I'm inclined to believe Zimmerman over them.