I don't even know what to think of these allegations:
You can read his bio at Wikipedia. The guy says he specializes in "psychological warfare," which makes his allegations even stranger.
You can also read Washington's Blog's post concerning these allegations here: http://www.zerohedge.com/news/2016-11-02/us-insiders-%E2%80%93-not-russia-%E2%80%93-leaked-clinton-emails
What I find difficult to believe is NOT that the Clintons are corrupt.
What I find difficult to believe is that enough people in government would care to intervene.