As I understand it, he followed a teenager because he was in a hoodie and black, it was raining, he told 911 what he saw and suspected, they informed him to stop following the boy, his subsequent comments were assumptive and condemining, he left his car and approached the teenager after being told not to, he got into an altercation of some sort and shot and killed a fellow human being, he is an asshole, racist, and wacho at best, and from what is known a murderer. Assholes with guns kill people. Judge jury and executioner all in one, how lovely.