Mo. Rev. Stat. § 84.090

84.090. Board of police — duties, powers. — The duties of the boards of police hereby created shall be as follows: They shall, at all times of the day and night, within the boundaries of said cities, as well on water as on land,

(1) Preserve the public peace, prevent crime and arrest offenders;

(2) Protect the rights of persons and property;

(3) Guard the public health;

(4) Preserve order at every public election, and at all public meetings and places, and on all public occasions;

(5) Prevent and remove nuisances on all streets, highways, waters and other places;

(6) Provide a proper police force at every fire for the protection of firemen and property;

(7) Protect emigrants and travelers at steamboat landings and railway stations;

(8) See that all laws relating to elections and to the observance of Sunday, and regulating pawnbrokers, gamblers, intemperance, lotteries and lottery policies, vagrants, disorderly persons, and the public health are enforced;

(9) They shall also enforce all laws and all ordinances passed or which may hereafter be passed by the common council or municipal assembly of said cities, not inconsistent with the provisions of sections 84.010 to 84.340 , or any other law of the state, which may be properly enforceable by a police force;

(10) In case they shall have any reason to believe that any person within said cities intends to commit any breaches of the peace, or violation of the law or order beyond the city limits, any person charged with the commission of crime in said cities and against whom criminal process shall have issued, may be arrested upon the same in any part of this state by the police force created or authorized by sections 84.010 to 84.340 ; provided, however, that before the person so arrested shall be removed from the county in which such arrest is made he shall be taken before some judge, to whom the papers authorizing such arrest shall be submitted; and the person so arrested shall not be removed from said county, but shall forthwith be discharged, unless such judge shall endorse and approve said papers;

(11) The said police commissioners, or either of them, shall have the power to administer oaths or affirmations in the premises, to any person appearing or called before them;

(12) They shall also have the power to summon and compel the attendance of witnesses before them, whenever it may be necessary for the more effectual discharge of their duties.

(RSMo 1939 § 7691, A.L. 1978 H.B. 1634) Prior revisions: 1929 § 7543; 1919 § 8953; 1909 § 9805 Effective 1-02-79