California, United States of America
The following excerpt is from People v. Castaneda, S085348 (Cal. 2011):
Finally, defendant presents no legal authority for the proposition that the exclusion of testimony based upon the incompetence of the witness or the absence of a foundation for the testimony, or the exclusion of a misleading exhibit, violates a defendant's right to present mitigating evidence. As we have observed, "[t]he 'routine application of state evidentiary law does not implicate [a] defendant's constitutional rights.' [Citation.]" (People v. Hovarter (2008) 44 Cal.4th 983, 1010.)
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