I was in a military base store buying a bigger purse and took my items out the one I purchased on the previous day. The security (LP) took me in their office for almost an hour. I supplied the receipts and everything providing there was no suspicious activity. The supervisor called apologizing and wanted to know what could they do to rectify the situation.
Personal Injury Lawyer
Defamation requires a false statement of fact that is communicated to a third-pary and causes damages to reputation. This sound more like a potential civil claim for false arrest and false imprisonment. You should contact a local civil rights lawyer immediately to discuss the details.