George Zimmerman, killer of unarmed 17 year old Trayvon Martin. It has taken some days for the sense of outrage to build, as it becomes more obvious that yes, this guy (Zimmerman) is a dangerous gun-wielding irritant, who against the express wishes of the police decided to track down and confront Trayvon Martin for the heinous crime of being black in public.
We all know what happened next, and that Zimmerman seemed to get away with it. That looks less likely now, at least. Coverage is widespread, but for my money, Ta-Nehisi Coates has the best of it, over multiple posts and days.