Somewhat. They mete out jurisdiction over matters of competence and faith, or, rather, the lack of either; usually consisting of a summary execution.
The police, however, is filled by the Arbites on the civilian side, and on the military side, either by Commissar's, or by other Schola Progenium heavies - notably Storm Troopers on naval vessels, although Armsmen (as seperate from chaingangs/press ratings) are known to help NCO's in this matter. I've yet to find a reference to the equivalent of Red caps in 40K, although I could be mistaken.
100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3