Robert H. Jackson, United States v. Smith (331 U.S. 469…
“ We doubt if many cases will occur in which very shocking injustices will survive after the trial court denies a motion based on detailed recital of grounds for new trial and a Court of Appeals affirms. This possibility seems too remote to induce us to hold that a trial court's denial of a new trial, affirmed on appeal, has no finality and that a trial judge may, even after service of a sentence has begun, set the whole proceedings aside and start over-if indeed a new start would not also the forbidden. [5] We hold that the Government was entitled to the relief sought. ”
