@hawkeye10,
I'm not inclined to think that threats to shoot people constitute such a "petty crime"--particularly in the case of George Zimmerman. Neither did the police, who responded by sending 8 units to the scene.
And, if law enforcement wants to pursue trying to retrieve evidence of such actions on Zimmerman's part, it will be because they are not comfortable just dropping the matter.
Zimmerman isn't being "abused" and he's no innocent victim. If he had stayed away from the house, as he had agreed to do, none of this would have happened Monday. If he hadn't followed Trayvon Martin, in violation of the rules for a Neighborhood Watch, that teen would still be alive...
Zimmerman violates, and instigates, and provokes, and it creates legal problems for him--he's not being "abused", it's his own behavior that creates those problems for him.