I can confirm that he was around and running Universe Corps trainees at Flag in 1999. I met him and dealt with him daily on my training. He seemed pretty nice.
But he also was thin and frail and looked like he had just come out of a hole he had been in for a very, very long time???? He was quite pale in color too.
I assumed at the time that he had been on the RPF the time that he had disappeared. But since being out, it looks like he may have been in the hole. And maybe he ended up back in the hole after that stint at Flag.
Heber Jentsch was also at Flag at that same time. I saw him a few times there. I think that was the last time I saw him.