A is walking to his car in a parking garage. It is late at night and the garage is nearly empty. B approaches A. B is walking quickly toward A and yelling for A to stop. B reaches into his jacket and A sees what he believes to be a firearm. A draws his own firearm and shoots and kills B. It is later discovered that B possessed a fake handgun inside his jacket. Can A assert self-defense on these facts? What facts would support or not support such a claim?