If 911 described Tamir as a man waving a gun, then that doesn't fucking MATTER because at that range (which the murderer entered OF HIS OWN VOLITION instead of defusing the situation any other way and whoops there goes THAT justification) it was blindingly obvious that Tamir was a CHILD, not a fucking MAN, and nothing matters anymore because this mockery of mankind's belief in good and in justice happened, and so the world is arbitrary and cold and it laughs at you when you forget that.
Still, try not to beat yourself up too much, niam. You mixed up the names of two people because you were tired and angry, you explained yourself, we understand.