A man walked into the corner store with a shotgun and demanded all of the money from the cash register. After the cashier put the money in the bag as instructed, the man demanded the bottle of Scotch he saw behind the counter. The cashier refused to hand over the Scotch because he did not believe the man was 21. The robber swore he was, but still the clerk refused. Finally, the robber handed over his ID and proved that he was indeed twenty-one. As soon as he left, the cashier called and gave the police the name and address of the man who had just robbed the store. The suspect was arrested two hours later.