It sounds like in Miami the kids in schools don't get charged with crimes when they are caught.
In our high school, in Williamson County TX, Trayvon would have an ADULT criminal record for defacing school property, and paraphenalia on school property which is a class B misdemeanor. And 17 is an adult here. I'm just sayin'. For all the statements his family and lawyer have made that he's squeaky clean, he's darn lucky he's in Miami and not here. He'd have probation for the defacing of school property, and then when the second crime of paraphenalia in a school zone was found, while he would have been on probation, he'd probably face some jail time. As an adult. That with his prior record of truancy, which is also a crime, that his parents would have been charged with here.
I don't know what the jewelry is about. I suspect strongly it was involved in a crime somehow or he'd have just said whose it was.
This really casts him in a different light. What WAS he doing when GZ came upon him? It seems quite likely he was trying to shake GZ because he knew the cops were called. It seems quite likely to me that GZ did ID himself as neighborhood watch, and that made Trayvon flee - not out of fear of an attacker, but fear of again getting caught doing . . . something. Or just general distrust of LE. It seems at this point he wasn't in fear that this pudgy Crime watch guy made Trayvon believe he would be attacked or mugged.