Mo. Rev. Stat. § 324.1146: Licensure of law enforcement officers, qualifications.

Law enforcement officers who perform private investigations shall be licensed under this chapter subject to the following qualifications and limitations:

(1) The board may waive testing for law enforcement officers currently certified under existing peace officer standards and training requirements under chapter 590;

(2) Law enforcement officers shall pay the appropriate licensing fees;

(3) Law enforcement officers shall assume individual liability for their actions while performing private investigations, complying with any insurance or bonding requirements imposed under sections 324.1100 to 324.1148;

(4) Law enforcement officers shall not utilize their official capacity in the course of a private investigation, including but not limited to:

(a) Accessing information intended only for police officials. Law enforcement officers shall comply with the legal limits on access to the information of private citizens;

(b) Utilizing any official item, such as a uniform, badge, or vehicle, while performing a private investigation. Law enforcement officers shall provide their own equipment;

(c) Utilizing law enforcement officer arrest and use of force standards. Law enforcement officers shall use private citizen arrest and use of force standards while operating as a private investigator;

(5) Law enforcement officers shall produce evidence of training and experience concerning the legal limits imposed on private investigations or pass a test on such subject produced by the board; and

(6) The provisions of sections 324.1100 to 324.1148 shall not apply to law enforcement officers who provide only private security services and not private investigator services.