A Utah judge has unsealed a federal ballistics report tied to the high-profile case against Tyler Robinson, the man accused of assassinating conservative activist Charlie Kirk at Utah Valley University. The newly released document from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) adds fresh detail to a case already built on multiple forms of forensic evidence, while also highlighting a familiar limitation in firearm investigations: not every bullet fragment produces a definitive match.
According to the report, forensic examiners were unable to conclusively link a damaged bullet fragment recovered during the investigation to the suspected murder weapon. However, the same analysis did confirm a match between a spent shell casing and the rifle prosecutors say Robinson used in the shooting.
The findings themselves were not new to the courtroom, but the public release of the full report provides a more detailed look at what investigators tested, including a “deformed/damaged” portion of a bullet jacket and several lead fragments recovered from the scene. The disclosure came after earlier sealed filings referenced the same conclusions in passing.
The report had originally been attached to a defense motion filed under seal on January 9. That motion sought to pause additional forensic testing until defense experts could independently examine and document the evidence. Utah Judge Tony Graf ultimately ruled there was no legal justification to keep the material sealed, noting it did not contain any “private or inflammatory information.”
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