My question involves criminal law for the state of: GA
I recently visited a big (super) retail center and the last item I grabbed was a bag of cat litter. I don't own a cat, it was for a friend, and there was 2 brands placed in the same place behind price tag of 4.94$ with a near by tag marked 14.94$ so I placed both in the buggy and went to checkout. When I lifted the cat litters out the cart the scanner went off and I wasn't sure which was scanned, the attendant was busy so I just placed one of the bags in the bagging area thinking that since they were different weights the system would only continue if the bag scanned was the one placed in the bagging area. Well it let me continue so I placed the other bag to the side paid for all my stuff and tried to exit the store.
Right as I got to my car 2 females yelled to me "Sir could you help me please?" I'll wrap this up. After walking back to them, she said that I had paid for the 5$ bag but placed the 14$ bag in the cart. I apologized and tried to explain what happened but nothing I said mattered, I was taken to jail and now I have a court date coming up as I've already entered NG plea at first appearance.
My question is why would the loss prevention employee do this? Do they not have to have proof that my intentions were to steal? or can she just say she's a psychic and therefore she knows I hatched this elaborate scheme to pay for over 100$ for items and then tried to get over on the store for 10$ worth of cat litter? I'm sorry for all the rambling I'm just so dumbfounded by this situation, why was I being watched? watched so closely? watched scan and pay for 9 other items legitimately and then when I make an honest mistake why would anyone assume it wasn't a mistake but some elaborate scheme to steal cat litter? Nothing makes sense about this to me can anyone tell me what I should expect in court?
is there anything I can do now or any ways I can be best prepared to prove to the court I'm not perfect and I made a mistake...? ANY help or replies would be greatly appreciated...

