S.C. Code Ann. § 17-23-20: Double jeopardy after trial in municipal or magistrates court.

Whenever a municipal court or a magistrates court shall have acquired jurisdiction by reason of a person committing an act which is alleged to be in violation of a municipal ordinance and which is in violation of the criminal law of this State a conviction or an acquittal by the first court acquiring jurisdiction shall be a complete bar to a trial by another court for the same alleged unlawful act or acts.