Upon entering the store, the clerk told the victim to put on a mask. The victim refused, according to police, and walked up to the counter with items to buy.

The clerk refused to serve the victim, who then walked out of the store without paying for the items, police said,

The clerk then followed the victim outside of the store, recording him with his phone, police said. The two men then began to physically fight when the clerk pulled out a handgun and fired three rounds at the victim, striking him once in the shoulder.

Not really what the title says. In my opinion, if you refuse to take payment for what you publicly offer, then people have every right to take it without payment, but he obviously regarded it as robbery.