Missouri Revised Statutes Title VII. Cities, Towns and Villages § 84.343. Purpose of establishing a municipal police force, St. Louis City--written license required, when, penalty

(1) Preserving the public peace, welfare, and order;

(2) Preventing crime and arresting suspected offenders;

(3) Enforcing the laws of the state and ordinances of the city;

(4) Exercising all powers available to a police force under generally applicable state law; and

(5) Regulating and licensing all private watchmen, private detectives, and private policemen serving or acting as such in said city.