if he stepped in to help a member of the staff - I know the counterstaff in there are woman and if they were being attacked maybe he was trying to help them?
I certainly wouldn't expect anyone to step in gun versus money but I don't know that I could stand back and watch another human being getting battered without doing something.
There would be no violence if the staff handed the cash over in the 1st place which is what they are ordered to do via management.
There is no point in arguing with these people, they want the cash, give them the cash and it`s over with.
Let the police handle it and the insurance companys.
Life is worth more than a load of cash or ones reputation being embarrased.