May a district court expand the record on remand to allow the government to present additional evidence even though the government's burden was clear at the initial sentencing?

Questions Presented For Review L May a district court expand the record on remand to allow the government to present additional evidence even though the government’s burden was clear at the initial sentencing? I. Should the Federal Sentencing Guidelines for non-production child pornography offenses be entitled to a presumption of reasonableness? 1