Whether the Due Process Clause is violated when the only witness for the Government linking the appellant to a narcotics conspiracy commits perjury in material testimony before the grand jury relative to an element of knowledge, and then subjectively makes the same misrepresentation before the trial jury in connection with the same subject matter, and the misrepresentation is left uncorrected by the Government

Question Presented Whether the Due Process Clause is violated when the only witness for the Government linking the appellant to a narcotics conspiracy commits perjury in material testimony before the grand jury relative to an element of knowledge, and then subjectively makes the same misrepresentation before the trial jury in connection with the same subject matter, and the misrepresentation is left uncorrected by the Government. i