I would put it as if in a large city there are different districts so cops in each district would be a little different also you have some sectors that have corporate security rather then cops. Those lower fringe areas might not have as many cops would use a diverse group of characters for the cops/security. Use your imagination it is a large area would say cops might be more reactive then active. In better sectors of the station less tolerance for crime. Lower section people getting ejected out into space might happen more often. Make it so that if they do get questioned for a fight they get their weapons confiscated while the investigation is underway. If they get into confrontations a lot have them banned from certain sectors. Cops cannot be everywhere at once also so sometimes they might have to run after a short battle and not be able to get anything. Make repercussions for their actions.
