I have, and like I stated in an earlier post, it's not self defense if you start the fight.  A fight that starts in self defense, can turn the defender into the attacker. There are many cases of legal precedence for this.    For example, if you sucker punch a guy. He doesn't have the right to knock you down and proceed to wail on you. He is no longer acting in self defense. So in the context of the law, it doesn't matter who threw the first punch. Once Trayvon was on top of Zimmerman beating on him, he was no longer protected under self defense, he became the attacker whether he started out as the victim or not.     Self defense isn't a license to beat the crap out of someone when they're on the ground, even if they threw the first punch. You lose the right to claim self defense.