S.C. Code § 23-21-80
When any resident of any city that establishes a board of police commissioners under this chapter shall be required to attend as a witness the trial of any officer or member of the police force before such board, the secretary of the board, upon application, shall issue a subpoena directed to such person, stating the cause and time appointed for the trial. If any witness thus subpoenaed fails to appear, he may be attached by the board for contempt. The attachment shall be directed to someone of the police force of such city and made returnable before the board at some stated time, and the board may punish such witness by a fine not exceeding ten dollars or imprisonment not exceeding thirty days, unless he shows good cause for not obeying such subpoena.
S.C. Code § 23-21-80