Talk to local LE. Unless things have changed, if someone is actively a danger to themselves or others, you or LE can complete a Petition that puts them into protective custody for a mental health eval for 24 or 48 hrs. Can't remember from my medic days. The ER doc or psych can certify them. You may have to go to court to testify, but all of this gives you just reason to bring up that they have a FOID.
I'm not dumb. I just have a command of thoroughly useless information.
- Bill Watterson, "Calvin", It's a Magical World