Eric Braverman was the CEO of the Clinton Foundation. Check out George Webb’s Day 50 or 56 Where is Eric Braverman?
Apparently he realized that CF was really bad, and to protect himself, called a reporter and said follow the money etc. Left to go to Russian Embassy IIRC, in NY, and disappeared.
Webb continued this investigation for a few months, and finally determined he was still alive.
I don’t know the others.