Zimmerman shot Martin through the heart.
Whereas Zimmerman's wounds were said to be insignificant. None of Zimmerman's DNA was found on Martin's sweatshirt or in scrapings of Martin's fingernails.
The police told him not to pursue.
Because of these statements I doubt very much Zimmerman would have gotten away with it in my country. Here the violence used to stop someone has to be within reason, appropriate. A fist can not be answered with a bullet through the heart.
(Besides the fact that carrying a gun is illegal here and acting against the police's advice/order will not plead in your favor when on trial.)
Florida's 'Stand your ground' strikes me as rather bizarre. "People fearing for their lives can use deadly force without having to retreat from a confrontation, even when it is possible", right? I regard it as an invitation to carry a gun and use it; kill instantly on fear of being killed.
I wonder what would have happened, legally, if Martin had carried a gun and if he had aimed for Zimmerman's heart just a bit quicker than Zimmerman did.
Edit: the one that dies is 'just' unlucky, the one that survives is free and gets away with it?