The following excerpt is from U.S. v. Rincon, 984 F.2d 1003 (9th Cir. 1992):
We review for abuse of discretion the district court's determination to exclude expert testimony regarding the unreliability of eyewitness identifications. United States v. Poole, 794 F.2d 462, 468 (9th Cir.) ("[t]he trial court has 'broad discretion' to admit or exclude expert testimony ... [and] [w]e will not reverse the trial court's ruling unless we conclude that it was 'manifestly erroneous' ") (citations omitted), amended on other grounds, 806 F.2d 853 (9th Cir.1986).
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