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Member
Two problems with this. First, it's illegal to have a gun on campus (including being locked in your car). If I were the cop I would be suspicious of someone who needed to go back to their car after seeing a metal detector. Even if I were to go that route, I didn't see it until I was getting ready to go through it. Partly because I didn't have to think of this issue (I can't carry yet) and because I too have never seen a metal detector in an emergency room.
Ok, so in this situation you've accidentally broken the law by carrying on campus, and then into the hospital. You remember that you're carrying when you hit a metal detector. Best bet is still to return your sidearm to your car.
In my opinion, that's the best way to rectify your mistake. While technically still illegal, at least you're no longer carrying it.
You could drive back home and drop it off, but then you're leaving your wife.