California, United States of America
The following excerpt is from People v. Dugar, A148964 (Cal. App. 2019):
Opinion testimony by an expert witness is admissible if it is "[r]elated to a subject that is sufficiently beyond common experience that the opinion of an expert would assist the trier of fact." (Evid. Code, 801, subd. (a).) We review the admission of expert testimony for an abuse of discretion. (People v. Kovacich (2011) 201 Cal.App.4th 863, 902.)
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