I don’t know everything about the Trayvon Martin case in Florida — no one does, except for George Zimmerman — but from what I’ve read, if the “stand your ground” law applies, it seems to me that it favors Trayvon, who had every reason to feel threatened.
Follow-up: Five days later, more details are emerging about both Zimmerman and Martin, and my opinion hasn’t changed — Trayvon, and not Zimmerman, is covered by the “stand your ground” law.