The following excerpt is from Murray v. Estelle, 996 F.2d 1226 (9th Cir. 1993):
It is settled law that a witness may not be found "unavailable" unless "the prosecutorial authorities have made a good-faith effort to obtain his presence at trial." Barber v. Page, 390 U.S. 719, 724-25 (1968). The burden rests on the prosecution to show that the witness is unavailable despite its good faith efforts. Id. at 74-75.
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