Mains v. United States

"[e]vidence is not necessarily insufficient merely because the witness' testimony has been contradictory and the explanations therefor difficult of belief" (citation omitted) | “[e]vidence is not necessarily insufficient merely because the witness’ testimony has been contradictory and the explanations therefor difficult of belief” (citation omitted) | “The mere possibility that an item of undisclosed information might have helped the defense, or might have affected the outcome of trial, does not establish ‘materiality’ in the constitutional sense”