S.C. Code Ann. § 41-18-340: Detention by security officer for safety warning violation; defense in civil action for detention.

(A) A security or law enforcement officer may detain a person for a reasonable time in a reasonable manner for the purpose of conducting an investigation if the security or law enforcement officer has reasonable cause to believe that the person has violated any posted rules or warnings or instructions of the owner of the carnival or amusement device or the owner's agent or employee.

(B) In a civil action brought by a person resulting from a detention of a person by a security or law enforcement officer, it is a defense to that action that the security or law enforcement officer who detained the person had reasonable cause to believe that the person had violated a posted rule or warning or instruction of the carnival or amusement device owner, or of the owner's employee or agent, and that the security or law enforcement officer detained the person for a reasonable time in a reasonable manner for the purpose of conducting an investigation of the alleged violation.