Generally yes. However the older the teen is the more they may also share in the blame for asking. If they gave a false ID or told the individual they were of legal age and looked it the situation may be different. Why not consult a member of the Tenn. Assn for Justice--they give free consultations?
Very likely, yes. Regardless of whether you are asking about the criminal aspect, or civil (to sue), do not talk about the case to anyone except a lawyer
