I. When a defendant pled guilty to being a felon in possession of a firearm in violation of 18 U.S.C. § 922(g)(1), and the plea was neither knowing nor voluntary because no one was aware that knowledge of his prohibited status is a crucial element of the offense, is the defendant entitled to automatic plain-error reversal, or must the defendant prove he would not have pled guilty had he been advised of the knowledge-of-status element?

II. Does the mere fact that a defendant served a sentence of more than a year for a prior conviction necessarily prove the knowledge-of-status element for conviction under 18 U.S.C. § 922(g)(1)?

Whether a defendant who pled guilty to being a felon in possession of a firearm is entitled to automatic plain-error reversal when the plea was neither knowing nor voluntary due to lack of awareness that knowledge of prohibited status is a crucial element of the offense