As an attorney who has represented many beaten down defendants, the original reply is right. The defendant in this case, General Flynn had an allocution before the court and told the judge he was pleading guilty of his own free will and because he was factually and legally guilty. That is a high burden to overcome. In most cases, the courts will hold that he waived any irregularities by pleading.
Even if the judge determines there is overwhelming or at least credible evidence that the defendant was coerced into the plea?
And with the additional knowledge that both the FBI and his own defense team held exculpatory information from the defendant... and the court despite orders to produce such?
If a jury finds a defendant guilty based on evidence that is found to be false, can that finding be overturned?
If it can, why couldn’t Flynn’s plea be vacated, or whatever the right term is?