What can I do if I was accused of possession of stolen property but I had no idea it was stolen?

This friend of mine and I were best friends at one point. She knew the things I liked and disliked down to the smallest things. After a while, we just grew apart and we still talked but not as often. She moved to another state and we talked less and less but we messaged through Facebook. She contacted me when she came back to visit her family. She had already been back for almost a month before she called me and asked to borrow some money - because of the situation she was in I felt bad but said I would see if I had a few any to spare after I paid my bills. But then she mentioned how she lost her receipt for a pair of jeans she bought from a consignment shop and they couldn’t give her a cash return but only a store credit and the jeans were a bit big on her so she wanted to see if I could lend her a few dollars and she would just give it to me! When she visited me later that evening, she brought it to me and looked very stressed and upset so I decided that I would just give her $40.00 so she could get gas and some milk and food for her 4 year old son. I had no idea they were stolen because the price tag was attached there was no indications that lead me to believe or suspect they were since she never mentioned anything. A week later, I took it up to the consignment shop not to return but to just consign with other old clothing. Of course I didn’t know until an hour later as I waited to be called that the police had been called and took me to the back and started questioning me. At first, I thought it was a joke and then it sunk in and I was so angry and confused at this friend for using me and lying to me. They wrote me a citation for possession of stolen property but I did not know it was stolen to begin with. When I left the store, I messaged her and after two hours she messaged me on her phone and then admitted she stole them after I told her that her dishonesty got me in a lot of trouble. I saved these messages! She now blocked me and changed her number.