I don't think you can get away with shooting. This kind of robbery is a felony. It is doubtful whether you can save your life if you don't kill someone and get caught. The killer just didn't want to leave two employees to provide clues or be witnesses later. If you do it neatly and carefully, the suspect is likely to get away with it without witnesses. So he must have planned the murder on purpose. It is a hidden danger to keep this kind of thing. Shoot me.