Hard To Catch

HARD TO CATCH
A man enters a pharmacy and requested a supply of Viagra.
The clerk sends him over to speak with the pharmacist.
The pharmacist tells the man he would need a Doctor's prescription in order for her to dispense the drug.
The man, seemingly pacified, leaves.... and returns with a gun. He pulled a hand gun and demanded Viagra again.
The pharmacist gave him four full bottles and two partial bottles, then the man fled.
The police sergeant who was first on the scene pondered, "This makes me wonder. Do we look for a hardened criminal?"