Guilty Until Proven Innocent

A customer tried to rush out of the fitting room but not before I was able to carry on the following conversation:

Me: Are you done with your room?
Customer: Yes.
M: Did you have more than that one item in your hand?
C: Yes.
M: Could you bring out the rest of your items and your number so that I may count you out?
C: No.
M: Could you show me the room that you used so that I may clear it out?
C: No.
She pauses, looks at me as if offended, and proceeds to add,
C: I didn't steal anything.

Two things:
1. If you didn't steal anything, then there should be no problem with giving me all the garments you decided not to get or at least show me the room you were in, and...
2. How am I supposed to know whether or not you stole anything if you won't let me count you out?

This is why I Work 2 Rant.