No idea. I do know he had no less knowledge about the business than the other members of the board did.
Then an investigation would, presumably, demonstrate Hunter and Joe's innocence. An investigation would clear their "good" name, right?
You need a good reason to investigate a person. Reasonable cause which is usually backed by evidence.
You didn't feel that way when a special counsel was appointed to investigate potential Trump-Russia "collusion".
Sure I did. There was reasonable cause. There were multiple instances of Trump/Russia interactions and conflicting accounts of why, there were questionable financial dealings, the fact that, per all of our intelligence agencies, and those of other countries - Russia was attempting to interfere in our election (and others), there were Russian attempts at hacking, some successful, the timely release of hacked information - a lot of stuff pointing to a need to investigate. It would have been a dereliction of duty to not investigate something that could so profoundly impact our electoral process and the trust in that process.