can i get an lawsuit for being locked up for shopliftting an i never stole anything

If you are talking about a civil demand letter from a store which accused you of stealing, the anser is yes, they can sue you. However, it is unlikely that they will. I recommend to my clients that they don't pay the civil demand letter. If you have stolen from a store, the store can legally charge you five times the amount of stolen goods. however, in my experience, they don't sue because the amount is too small to hire an attorney.