L.C.
Wow, you are a VERY young mom to have a 12 year old. And five kids? You've got your hands full. All I can say is you need to find consequences that she REALLY cares about and implement them. Set clear, realistic goals for her to reach so she can earn your trust back. If my child did that I'd start by cleaning out her room. She's not respecting other people's property so why should she have any property of her own. Let her earn her possessions back. Also, what about having her do some community service? I believe you have to be strict and show you really mean business. I know it's easier said than done.