What is the test for refusing to allow an expert witness to testify at trial?
MultiRegion, United States of America
The following excerpt is from U.S. v. Cuevas, 847 F.2d 1417 (9th Cir. 1988):
The decision not to permit an expert witness to testify will not be disturbed unless manifestly erroneous. United States v. Langford, 802 F.2d 1176, 1179 (9th Cir.1986). A trial judge has considerable discretion in determining whether the jury will be assisted or confused by the proffered testimony.
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