You don't understand assualt and battery and the right to self defense and due process of law which creates a safe and civil society. Trayvon Martin didn't understand it, Mona Yvette Nelson didn't understand it, and apparently you don't either.
Trayvon Martin assaulted and battered a citizen, Mona Yvette Nelson assaulted and battered a citizen. Trayvon got mass media bacause he was black, Mona got nearly zero media because she is black. If they were White the media coverages would be reversed. There's your racism.