William Jones v. United States

Whether the Constitutional rights to confront witnesses and to present a defense require that Federal Rule Of Evidence 613(b) be interpreted to require the admission of evidence undermining a cooperating witness’s claim that he had given the same account from the beginning of his cooperation ?

Whether Federal Rule Of Evidence 613(b) requires that testimony be admitted that would undermine a cooperating witness’s claim that he had given the same account from the beginning of his cooperation?