Case (cite)
State v. West, 2014 WL 2777156 (N.C. App. 2014)
“A trial court should first look to precedent for guidance in determining whether the method of proof underlying an expert’s opinion is reliable. . .. Once the trial court determines the expert’s method of proof is reliable, “any lingering questions or controversy concerning the quality of the expert’s conclusions go to the weight of the testimony rather than its admissibility.” . . . It is well settled that firearm toolmark identification is recognized as a reliable method of proof as “[c]ourts in North Carolina have upheld the admission of expert testimony on firearm toolmark identification for decades.”
Trial court limitations on testimony: “The Court, however, is going to limit the opinion of the expert to not allow the expert to testify that a match may be done to the exclusion of all other guns in the universe. The expert may testify, as was stated by the expert on the stand during this voir dire, that a bullet came from a particular gun to within a reasonable degree of certainty in the firearms examination field and any other language that describes what that field is, and what the reasonable degree of certainty is. I’m just not going to allow her to say that it is to the exclusion of all other guns in the universe. And that will be my ruling in this matter.”
“The court’s ruling only limited Agent Pappas from testifying that a bullet was fired from a particular gun to the exclusion of all others. Our review of the record reveals that Agent Pappas opined, based on her analysis, that the bullet recovered from Brown’s head and a shell casing retrieved from the scene of the shooting were fired from the .380 caliber Cobra handgun. Agent Pappas did not testify, as defendant contends, that “[defendant’s] gun was the only gun in the world that could have been the source of the bullet and casing.””
Note: the limitation language is very vague and I found it interesting that her testimony does not appear to to state her opinions to any degree of certainty (at least not mentioned by the court) and yet the court upheld it as complying with the limitation.