If what he said is true, it will be dismissed and he has grounds for suit.
I don't think it is though.

In order to be disqualified you have to be confined in the hospital against your will. That takes an order by a Magistrate or Judge.
The state police wouldn't even know about it without the order.

Unfortunately, because of The Va Tech killings, involuntary commitment reporting is being pushed by the anti's....but n this case, there's more involved.