Hey, y'all are working really hard to turn things around.
Performing illegal abortions and then going to prison for it doesn't sound like misdemeanor time to me.
Nor does doing time for NFA violations involving multiple sales of full-auto stuff and silencers sound trivial. Remember that on the Yellow Sheet, the question is whether you've ever been charged with a crime for which the punishment could have been two years or more. Regardless of the outcome in sentencing, full-auto violations COULD have meant well above two years.
If the guy's smart enough to be a physician, he's smart enough to know the laws about his favorite hobby. He's 82, now; he was in his fifties at the time of the full-auto deal. Not exactly senile. If he'd jumped through the hoops to own legal full-auto stuff and silencers, he knew the law's requirements about selling.
If he didn't acquire the stuff legally, he's flat-out a law-breaker, and darned well knew it--since it's not been a secret since way, way back yonder...
As far as "right now", he's 82 and on dialysis, so the only real issue is security of the firearms, powder and ammo. Pointless to file any serious charges. Dunno about this guy, but my father only lasted a little over a year when his kidneys were failing to the point of needing dialysis.
Art