Wardius v. Oregon, 412 U.S. 470 (1973); Gray v. Klauser, 282 F.3d 633, 644 (9th Cir. 2002) (Idaho deprived petitioner of right to present a defense under Sixth Amendment when trial court used different standard for determining admissibility of hearsay statements from two dead victims. "A state rule or state judge may not without justification impose stricter evidentiary standards on a defendant . . . than it does on the prosecution.").