More here:
http://www.waff.com/story/38591925/video-man-attacks-waiter-after-food-takes-too-long
She didn’t want to be interviewed on camera, but said the man was a regular customer, angry because the food was taking too long.
Both the manager and Donovan say the waitress had a concealed carry permit and was allowed to carry the gun at work
If he thinks that's justification for what he did then he needs to get his meals in a prison chow line for the next 10-15 years.