The following excerpt is from Lopez v. Cate, No. 2:12-cv-0029 MCE EFB P (E.D. Cal. 2013):
habeas relief only if it renders the state proceedings so fundamentally unfair as to violate due process. Estelle, 502 U.S. at 68-70. The exclusion of evidence pursuant to a state evidentiary rule is unconstitutional only where it "significantly undermined fundamental elements of the defendant's defense." United States v. Scheffer, 523 U.S. 303, 315 (1998).
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