This is the owner of the smoke shop and he's had other attempted robberies in the past. The guy is worried that the hoodlums' friends might return to seek revenge, hopefully he arms himself with a peace maker.Unfortunately, employee will most likely be charged with something as guy jumping the counter was not threatening him with deadly force so some ambulance chaser is going to claim excessive force and not directly threatened so no need to stab the guy. While I am all for the response, legal folks may see it differently.