Editing Adeptus Arbites

They are basically the police of the Imperium. But the aren't any cops they are badass motherfuckers, kinda like robocop but human. They usually drag the criminal up to the judge who then ceremonially declares them guilty and being guilty means that you have committed a crime and in the Imperium there is only one crime HERESY. On some worlds though they send the criminals into the penal legions instead of executing them on the spot.