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Does she have any prior criminal record?
Has she actually received any citation yet?
Ok, then if it were my daughter, I would tell her to contact the DA's office when she receives the citation and see if they have a local "pretrial diversion" program where she is put on probation, does some community service, attends some substance abuse classes, and then if she successfully completes probation, the charge is dismissed and never shows up on her record.
It is a one time shot to keep her record clean so it is definitely worth inquiring about it..