Detective is a security role without the HUD
Hud is needed (outside of magi/iaa job side to easily access records in processing for example) for spotting out certain people in crowd during patrol. Your job as an officer is not only to maintain peace and order on station, but also to find and detain/kill criminals/eocs. HUD is absolutely vital for that.
However, if i understood it correctly, cadet/constable job is not to hunt down or even try to arrest certain type of wanted criminals, and by certain type i mean: full power vampire, known cultist, desword tator on steroids, suspected changeling, guy who stole captains unique gun, medbay bomber, etc. Constable should not change security-antag balance, he, in my opinion only, is here to fight "greytide" in some way. Constable is needed for new players to get familiar with security job processes (can even lock sec officer job behind some hours of constable job) and also for already experienced players to give them sort of relaxed friendly security related chatting(something you have no time for as a regular officer because you need to find and kill some half vampire half syndicate mass murderer with maxcaps and memechems) and for some easy time arrests of drunk civillians who were fighting in bar. I think, if such job was ever implemented, their wiki description and spawning chat message should state something like "you are security cadet/constable. You are here to learn. Your job is to patrol station and upkeep peace and order, you are allowed to use your given tools to detain anyone who commits minor /medium crimes. If you witness someone committing any more serious crime (or you know person is armed), or if you see wanted crewmember, you are not allowed to engage them alone, however you may assist officer during arrest. Notify security and keep an eye on the criminal. Sop blah blah blah" well, maybe better wording, but anyway. Overall, in my opinion, they should not deal with any criminal who worth more than 15 minutes in brig, and also should not go around looking for already wanted criminals, even if they are petty criminals. Just patrol around, talk with people, report to "real" security and arrest hooligans/vandals. And they certainly need no HUD for that. Thing is, they dont really need sec hud, but need in fact eye protection (Portable flashers in brig, their own flash being used against them, etc). That is my opinion.
P.s. i really want to see that role implemented
P.p.s remove sec huds from IAAs