It is NONE of their business. Just ignore them and do your job.

Just say I think so. Seems they get a lot of there roid's here & other drugs. Or I think there cops.

Unless they show up in uniform, you have NO CLUE.

Therefore the ONLY honest answer is you DON'T KNOW.

It wouldn't violate HIPPA..

Let me get this straight - you work in a Pharmacy and you think it's HIPPA, don't know it's HIPAA?

Based on your ignorance, say "I don't know."

your answer should be that you don't know because an officer in plain clothes looks the same as any other customer

Just say we don't ask people their occupation; or keep no records of occupations

He either maybe abusing bills, or he is just scared his coworkers will find out his illness

You say you have no idea. How would you know what the person does for a living?

Just say, 'I don't know.' Because literally, you do not.