Is expert testimony allowed to help the jury understand the structure of a criminal enterprise?

MultiRegion, United States of America

The following excerpt is from U.S. v. Patterson, 819 F.2d 1495 (9th Cir. 1987):

The decision to admit expert testimony is committed to the discretion of the trial judge and is not disturbed on appeal unless manifestly erroneous. Fleishman, 684 F.2d at 1335. Expert testimony on the structure of criminal enterprises is allowed to help the jury understand the scheme and assess a defendant's involvement in it. See United States v. Johnson, 735 F.2d 1200, 1202 (9th Cir.1984) (expert testimony regarding general practice of criminals allowed to show modus operandi ).

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