I'm not so sure. I say that because; concerning Rosenbaum, some keywords I was expecting are missing (ie assault, attacked, placed in fear). I'll have to look at the video again, but essentially it seems like the narrative is saying that Rosenbaum pursued the kid, but there not anything articulated which indicated that deadly force was warranted.
Im not a lawyer, but at this point in time (according to the witness), Rosenbaum was within arms reach. To me, this is reasonable distance to defend yourself.
McGinnis said that the unarmed guy (Rosenbaum) was trying to get the defendant’s gun. McGinnis demonstrated by extending both of his hands in a quick grabbing motion and did that as a visual on how Rosenbaum tried to reach for the defendant’s gun. Detective Cepress indicates that he asked McGinnis if Rosenbaum had his hands on the gun when the defendant shot. McGinnis said that he definitely made a motion that he was trying to grab the barrel of the gun. McGinnis stated that the defendant pulled it away and then raised it. McGinnis stated that right as they came together, the defendant fired. McGinnis said that when Rosenbaum was shot, he had leaned in (towards the defendant).