Paul Jay interviews Glen Ford on this recent tragedy and the continuing racist nature of American society. The One Percent ruling class, like all ruling classes, fosters conflict between ordinary Americans in order to distract attention away from themselves, their destructive policies and actions. Because of so many protests regarding the Martin murder now going on across the US, it appears to me that this "divide and rule" strategy is not going to work very well this time. (Note: in the interview reference is made to "Stand-your-ground law".)
An excellent source for the latest information on this murder, I recommend that you follow an article link in Mother Jones that is being continuously updated.