Michael Sussmann, who lied to the FBI about alleged secret financial transactions between Trump and a Russian Bank, which kicked off a whole chain of events, including an FBI investigation into Trump-Russia collusion, worked for Hillary Clinton.
Sussmann coordinated with Clinton agents.
Sussmann billed Clinton for his time.
Sussmann knew it was nonsense, lied to the FBI anyway.
To be fair to Sussmann, the Comey-McCabe FBI wanted Sussmann to lie to them. They needed someone dumb enough to kick the investigation off with a lead of some sort. Hillary was supposed to win, and the FBI was supposed to make this all go away.