This amicus brief challenged unreliable firearm tool mark comparison expert testimony. We partnered with the Innocence Project in arguing that traditional forensic firearms and toolmark comparisons raise reliability concerns regarding methods and applications of the methods, showing that the scientific community has carefully detailed the lack of reliability of firearms and toolmark comparisons. We also argued that while error rates in forensic firearms identification studies are flawed and misleading, they are nonetheless important and still matter. We filed a similar brief in US v. Walker.
