S.C. Code Ann. § 16-7-20: Powers of law enforcement officers.

All law enforcement officers of the State or any of its subdivisions who may be called to duty in the area designated by the Governor in his proclamation, when engaged in the performance of duties in such area, shall have the full powers of constable at all places within such area and may pursue and arrest offenders against the laws of this State or the provisions of the proclamation.