In United States v. Scheffer, decided this past Term, the Supreme Court considered for the first time the admissibility of polygraph evidence. The Court held that exclusion of such evidence on behalf of a criminal defendant was supported by valid justifications and offended no constitutional right to present a defense.
Bennett L. Gershman, Lie Detection: The Supreme Court's Polygraph Decision, N.Y. St. B.J., Sept./Oct. 1998, at 34, http://digitalcommons.pace.edu/lawfaculty/622/.