The big problem is that I don't have access to the paperwork (psych profile) on him that proves what I'm claiming, nor do I have any right to access his records....
No problem at all Frannie. They do have the right. When buying a gun one has to fill out a BATF form (I forget the number) and one of the questions is regarding mental condition. Now if your [whatever he is] hasn't actually been committed it may be somewhat of a gray area legally but it sounds like the authorities would have a good case in taking his gun and rights to own them away.
Don't let up on the cops and DPS. I may be a big supporter of gun rights, but I'm also a big supporter of responsible gun ownership. There's some folks out there who just plain don't need to be even near a gun.
Mike.