Constables in the United States
While Constables primarily serve the Courts, they belong to the executive branch of government.
Court
The practical authority given to the court is known as its jurisdiction () – the court's power to decide certain kinds of questions or petitions put to it. According to William Blackstone's "Commentaries on the Laws of England," a court is constituted by a minimum of three parties: the "actor" or plaintiff, who complains of an injury done; the "reus" or defendant, who is called upon to make satisfaction for it, and the "judex" or judicial power, which is to examine the truth of the fact, to determine the law arising upon that fact, and, if any injury appears to have been done, to ascertain and by its officers to apply a legal remedy. It is also usual in the superior courts to have barristers, and attorneys or counsel, as assistants, though, often, courts consist of additional barristers, bailiffs, reporters, and perhaps a jury.