I've never known and still don't know who Flynn is. Is this more about both sides being mad that the other was doing whatever they wanted in trying to win an election?
He pleaded guilty to a charge of lying to the FBI. DOJ now wants to drop that charge.
What I found indicates the lying was about Trump campaign/Russia stuff from the election.
Lol that lying to the FBI is a crime. Unless you're the victim or innocent witness, you have to already be involved in some way to some dirt if you're being asked things by the FBI.