You always seem to forget that Martin was fighting with Zimmerman and it wasn't a fight that Zimmerman started.
I do think it was a fight that Zimmerman started. And all the evidence suggests that Martin threw only a single punch, in self-defense, and then Zimmerman shot him in the heart. The last thing Rachel Jeantel heard Martin say (to Zimmerman) was, "Get off me," suggesting Zimmerman grabbed him or grabbed at him--and that was after having stalked him in the dark, without ever identifying himself or his motives, to Martin. Zimmerman provoked the justifiable defensive reaction from Martin, and that reaction was not "an attack".
This is how Zimmerman looked that night after that alleged "fight"--he didn't even need bandaids. He's not beaten up, his nose is straight and does not appear broken, or even swollen, the two tiny scrapes on the back of his head account for a little dried blood, but his head isn't bruised, no goose-eggs, no swellings, no evidence of "pounding". There's no evidence he was "beaten-up" or "attacked" by anyone. Martin got to defend himself with one punch, and then Zimmerman shot him.
I am looking forward to the civil suit. Like O.J., I think Zimmerman will be found guilty in a wrongful death suit.