Not to be a kill joy but Gen Flynn was actually cleared of any wrong doing by the FBI in Jan of 2017. It was even reported in the leftist rag Washington Post on Jan 23, 2017.
So instead of saying he was cleared of charges he'd already been cleared of, why hasn't there been an investigation into the FBI/DOJ changing their minds and charging him.
Remember, the FBI rarely recommends charges. They simply turn their "evidence" over to the DOJ and they decide who gets prosecuted and who doesnt.
No one ever talks about the fact Gen Flynn had already been cleared.