"Far from authorising further proceedings at the district court's behest, the Constitution requires the court to honour the Executive's unopposed decision to drop the pending charges, and precludes the case from proceeding to sentencing in the absence of a live controversy," lawyers for the department wrote.
Flynn admitted lying to the FBI about his conversations on sanctions during the presidential transition with the then-Russian ambassador, a topic that recently released transcripts of the call show the two men discussed in detail. But the Justice Department said last month that the FBI should never have interviewed Flynn in the first place and that the communication he had with the ambassador was entirely appropriate.
Flynn enjoys strong support from Trump and conservative media, but the decision to drop the case outraged former law enforcement officials who were involved in the investigation, as well as many Democrats who called it a politically-motivated act. The motion to dismiss followed the recommendation of US Attorney Jeff Jensen, who was appointed by Attorney General William Barr to investigate the handling of the Flynn case.
Rather than grant the request, Sullivan appointed a retired federal judge, John Gleeson, to argue against the Justice Department's position and to consider whether Flynn could be held in criminal contempt for perjury since he had previously pleaded guilty under oath to lying and was now asserting his innocence. The judge also invited outside parties to weigh in with their opinions.
In their brief, Sullivan's lawyers cited what they said were numerous irregularities about the Justice Department's recent actions, noting that "it is unusual for a criminal defendant to claim innocence and move to withdraw his guilty plea after repeatedly swearing under oath that he committed the crime".