Case (cite)
U.S. v. Hunt, 464 F.Supp.3d 1252 (W.D. Ok. 2020)
“The Court finds that the limitations mentioned above and prescribed by the Department of Justice are reasonable, and that the Government’s experts should abide by those limitations. See Doc. No. *1262 81–11, p. 3. To that end, the Governments experts:
[S]hall not [1] assert that two toolmarks originated from the same source to the exclusion of all other sources…. [2] assert that examinations conducted in the forensic firearms/toolmarks discipline are infallible or have a zero error rate…. [3] provide a conclusion that includes a statistic or numerical degree of probability except when based on relevant and appropriate data…. [4] cite the number of examinations conducted in the forensic firearms/toolmarks discipline performed in his or her career as a direct measure for the accuracy of a proffered conclusion….. [5] use the expressions ‘reasonable degree of scientific certainty,’ ‘reasonable scientific certainty,’ or similar assertions of reasonable certainty in either reports or testimony unless required to do so by [the Court] or applicable law.
Id. As to the fifth limitation described above, the Court will permit the Government’s experts to testify that their conclusions were reached to a reasonable degree of ballistic certainty, a reasonable degree of certainty in the field of firearm toolmark identification, or any other version of that standard.”