Constables in the United States
While Constables primarily serve the Courts, they belong to the executive branch of government.
Government of Missouri
The judicial branch (the state courts) is established by Article IV of the Missouri Constitution. The state supreme court is the Supreme Court of Missouri - it is the highest court. The Missouri Court of Appeals is the state intermediate appellate court. It is split into three districts: Western (based in Kansas City), Eastern (based in St. Louis), and Southern (based in Springfield). The state trial courts of general jurisdiction are the 45 Missouri Circuit Courts and Associate Circuit Courts within each Circuit Court.