All this **** about jewelry hasn't really come into play because it is wholly irrelevant. Having an empty baggy, presumably for some pot, and some jewelry does not really establish that the kid did something wrong or that some theft on his part means he would go from trying to avoid Zimmerman to attacking him in a life threatening way while saying, as Zimmerman's father suggests, 'I'm going to kill you.'
By the way, the words Zimmerman's father has sought to put in Martin's mouth seem outlandish to me. It sounds like ready made smear. I really need some fill-in background to the situation that is not before us at present to believe the kid went from going to get Skittles and Iced Tea, or whatever, and trying to avoid Zimmerman, to attacking and saying something like 'You are going to die tonight.' That's sounds like some serious tailor-made CYA.