Samantha Karner

Role

ATF Firearm and Toolmark Examiner

Bio Notes

ATF firearm and toolmark examiner who conducted the ballistics analysis in the State of Utah v. Tyler James Robinson case. Testified at the preliminary hearing on July 9, 2026. Received only five of seven recovered bullet fragments for examination (exhibits 6A through 6E). Concluded her analysis was inconclusive, unable to identify the specific type of gun from which the bullet was fired. No one asked her to investigate the two missing fragments.