Yours sounds like a very plausible theory. Unfortunately, neither of us knows the truth for certain.  I do know for certain, though, that the man who implicated the Podestas did in fact die and foul play was "suspected". Maybe just a crazy coincidence. As I mentioned in a reply above, I wonder if this "investigator", who just happened to work for Tony's biggest business competitor, was hired to dig up blackmail info on his employer's competitors. His implicating the Podestas may have just been a way to make them look bad, true or not. If that's the kind of thing he was into, it would stand to reason that he had numerous people who might want him gone. Who knows?