This week brought harrowing proof of the racism still befouling American "criminal justice": Long after the fact, we find Colorado police had no reason to stop, never mind kill, Elijah McClain; a New York grand jury declined to bring charges against seven cops for killing Daniel Prude for being mentally ill; Ahmaud Arbery's mother sued three thugs who killed her son for jogging while black and the cops who covered it up. Each time, activists say, "The system did exactly what it was meant to do.”