What follows is My. Opinion. Only. I am not a lawyer/doctor/police officer/chemist, just a retiree who gets her local news out of Orlando, and has been following this case since day one.
I have to admit Mark O'Mara is "outlawyering" the state by a country mile. It takes real skill to turn a prosecution witness around to suit the defense! This guy is no Baez, that's for sure. He's good. Very, very good.
That said....
There are certain issues that the defense can spin all it wants but it doesn't change the facts:
1) Trayvon Martin was walking home from the 7-11 with his candy and his fruit drink, minding his own business and not breaking any laws.
2) George Zimmerman - armed with a loaded gun and with a background in martial arts - took it upon himself (NOT at the suggestion of law enforcement) to follow Martin, and then get out of his car and confront the teenager.
3) These facts make Zimmerman the aggressor.
Zimmerman claims Martin fought him and caused him injury; he was in fear for his life and so he shot Martin in self defense. He didn't choose to disable Martin by kicking him in the gonads or even wound him and then call 911; he shot the teen in the heart. The only reason you would aim for the heart is to kill someone dead on the spot.
If that is Zimmerman screaming for help on that tape, it certainly belies his "tough guy" attitude. Fighting an unarmed skinny teenager and you have a weapon and martial arts training and your only alternative is shoot-to-kill? Wow.
I don't understand how you can be the instigator in this sort of situation and then claim you are the victim. If anyone was Standing Their Ground that night, it was Trayvon Martin. But we only have Zimmerman's word on that since Trayvon Martin is, y'know, DEAD.
Whoever "wins" in this case, there are no real winners. Some of us will be satisfied with the verdict and some won't. Them's the breaks.