It seems strange that a man dressed in Muslim attire would point a gun at folks and shoot blanks. It seems to me that it is plausible that he is in training or is being trained by a group. They must overcome the shock of killing. So to me if this guy fired blanks at people, it could be what I mentioned. I hope the police get to this guy before he shoots for real. Just my theory. I could be wrong.
I just wish you folks had the ability to equalize force when your life is in jeopardy.