Gosh, I am sorry, yet not suprised.
Unfortunately, until you stops rescuing her she will continue to spiral downhill. You did not help her by bailing her out, perhaps if she spent several nights in jail, she may have reached her bottom, now I don't see it happening anytime soon.
As for returning to school, I do not remember-- are you footing the bill? If so, I wouldn't waste my money, at this point all that she is going to do, is party.
Keep in mind that it is her responsibility to make it to court and handle the reprecussions of her actions. Please try not to jump back in the middle again.
I know that you are hurting and love your daughter, however, if you keep enabling her, you could end up loving her to death.
If you are attending meeting, I would consider ramping them up, this is going to be a difficult time for you, you need to be strong and think with your head, not you heart.
Sending warm hugs your way