Huh. What I find totally unacceptable is the acceptance of a report by someone who was not present when the incident took place. Yes, I understand the CYA attitude going on here - but there ought to have been a red flag given by the two contradictory reports that should have led to a much less confrontational "meeting" with you.

Sorry this happened, hon. But you are right - what the student chose to do with her anger and upset is not your fault, you behaved appropriately and correctly.