Case (cite)
Commonwealth v. Harrison, 177 N.E.3d 190 (Mass. App. Ct. 2021)
Not a ruling on 702, but some discussion of the role of expert testimony in assisting the jury: A jury could reasonably infer that, because the expert’s firearm examination process entailed test-firing to assess functionality, the expert concluded that the shotgun met the legal definition of a firearm only because it successfully test-fired. In viewing all the evidence and permissible inferences in the light most favorable to the Commonwealth, we believe this qualifies as “some competent evidence,” id., sufficient to permit “any rational trier of fact … [to find] the essential elements of [count 8] beyond a reasonable doubt.”