Unfortunately the 67 year customer has succumbed to his injuries.
Here is the lesson:
blacks in America are unpredictable and violent. Over and over we see incidents like this, something irritating and innocuous to White people but cause for violence and death from blacks. Often it is a black who didn't show any signs beforehand of being violent. It is just boiling below the surface waiting for some ridiculous trigger to set them off.
Meanwhile we have to tip-toe around blacks because you never know what might set them off and even if you should defend yourself the odds are you will be the one jailed. Not that you will get a chance for a fair fight, they aren't into those. No, it is always an attack from behind, a gun when you are unarmed, when you are outnumbered, or smaller, or older or a woman. They get some perverse pleasure from hurting people and then strutting around like they are badasses for knocking out an old man who didn't even see it coming. It isn't right and it isn't just but you simply must avoid them.
At least for now.