Well, I did a little research on Martin. The pot didn't bother me so much since I see teens in my neighborhood (both black and white) smoking weed all the time, and I don't think they should be shot dead. But there was also a case involving some possibly stolen jewelry, which bothers me a little. Nevertheless, he was never charged, had no criminal record, and--most importantly--it had nothing to do with the night in question. Zimmerman also had brushes with the law. Martin was talking on a cell-phone and said, "Some creepy ass is stalking me". A witness said a boy was crying for help. Zimmerman was older, possibly stronger, and had some MMA training. In any case, Martin's only crime on the night in question was protecting himself from a perceived threat. Oh yeah, and buying a candy bar.
And I think Zimmerman selling the gun he used to kill Martin in an auction says A LOT about his character.