578.325. A duly authorized security guard may detain withinthe terminal any person committing an act declared unlawful byany provision of sections 578.300 to 578.330 and section 307.176,RSMo, until law enforcement authorities arrive. Such detentionshall not constitute unlawful imprisonment and neither thecompany nor such company representative personally shall becivilly or criminally liable upon grounds of unlawfulimprisonment or assault providing that only reasonable force isexercised against any person so detained.
(L. 1982 S.B. 519 ยง 6)