Whether when applying plan-error review based upon an intervening United States Supreme Court decision, a circuit court of appeals may review matters outside the trial record to determine whether the error affected a defendant's substantial rights or impacted the fairness, integrity or pubic reputation of the trial?

Whether when applying plain-error review based upon an intervening United States Supreme Court decision, a circuit court of appeals may review matters outside the trial record to determine whether the error affected a defendant's substantial rights or impacted the fairness, integrity or public reputation of the trial?