I'm pretty sure that I know that guy
Fortunately, he never got his hands on a gun while I knew him.
I'd go back and have a talk with the RO. Let him know that the guy continues to be a hazard to himself & all that are within bullet's range of him. I'm sure that the RO could make a report that would wind up in suspension of carry permit until such a time that the guy takes proper training & demonstrates that he isn't a hazard.
__________________
When Banjos are outlawed, only Outlaws will have Banjos
The Bible is my lawbook. I turn the other cheek when applicable, and spend the rest of my days resisting evil at every front, until I have breathed my last breath.