Ask yourself this: what will an attorney and mandatory rehab do for someone who is not ready to help herself? Taking that kind of actions speaks of a desire to manipulate or force recovery on your daughter.
There are times when it is useful to stop, do nothing and listen. HP will lead the way. Your daughter has been arrested and charged. If you don't interfere, she may well go to jail. Have you considered that this is what HP has planned for her so that she can have the opportunity to find recovery FOR HERSELF?