He may be after this.
Gateway Pundit had a story recently that because the prosecution withheld evidence the plea could possibly be set aside and the case dismissed.
Prosecutors that hid the evidence could also be disbarred.
Judge knowing all that has a duty to notify the bar association.
Also, ANY citizen can do a bar complaint if they even read in the newspaper about a lawyer committing an illegality. Don’t have to be a party to the suit or even live in that state.
If the Gateway Pundit information is correct, General Flynn has an available legal remedy.