Article By David Hawkins
A Utah judge has unsealed a federal ballistics report in the case against Tyler Robinson, the man accused of assassinating conservative activist Charlie Kirk at Utah Valley University, revealing key forensic details as the case moves toward trial.
The newly released findings highlight a central issue in the prosecution’s case as some evidence ties the weapon to the shooting, while other forensic elements remain inconclusive.
ATF Report: Bullet Fragment Inconclusive, Casing Matches Rifle
The report from the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) states that examiners could not conclusively match a recovered bullet fragment to the suspected murder weapon.
However, investigators did confirm that a spent casing was fired from the rifle prosecutors say Robinson used.
The report examined a “deformed/damaged” portion of a bullet jacket along with four lead fragments.
According to an appendix, an “inconclusive” result means there was “an insufficient quality and/or quantity of individual characteristics to identify or exclude.”
Two law enforcement sources told Fox News that the bullet could not be matched because it struck bone and broke apart on impact.
The breakdown of the bullet is something experts say is not unusual in fatal shootings.
Judge Orders Report Made Public
The document was initially filed under seal as part of a defense motion seeking to pause further testing until a defense expert could examine the evidence.
Judge Tony Graf ruled there was no justification to keep the filing sealed, stating it did not contain “private or inflammatory information.”
🚨🇺🇸 Update on the Charlie Kirk case: The ATF forensic report is out.
— Mario Nawfal (@MarioNawfal) April 16, 2026
The bullet that killed him was a .30-caliber fragment consistent with Tyler Robinson's Mauser 98 rifle, but too deformed for a definitive match.
Officially inconclusive.
The spent cartridge case?… https://t.co/N6gaEOldZF pic.twitter.com/tOFGKntzxv
Experts Say Case Remains Strong
Despite the inconclusive bullet analysis, experts say the findings do not undermine the prosecution’s case.
“It is not a win for the defense,” said retired FBI supervisory agent Jason Pack.
“It is simply a gap the prosecution is now working to address by bringing in the FBI with more advanced technology.”
Pack emphasized that ballistics are only one component of a broader evidentiary picture.
“The defense here is doing exactly what good defense lawyers are supposed to do, protecting their client’s ability to challenge evidence before it gets further altered,” he said.
“That is not a sign the prosecution’s case is weak.”
The ATF also confirmed that a .30-06 cartridge case “was identified as having been fired in the Exhibit 1 rifle,” which prosecutors say was Robinson’s grandfather’s Mauser.
Prosecutors Cite Additional Evidence
Robinson is accused of fatally shooting Kirk during a Turning Point USA event in September 2025.
Prosecutors say he positioned himself on a rooftop across a courtyard and fired a single shot, striking Kirk in the neck in front of a crowd of roughly 3,000 people.
Authorities allege additional forensic evidence links Robinson to the weapon, including DNA found on the gun, a towel, and three of four rounds loaded in the rifle.
Investigators also reported physical impressions on the rooftop consistent with a prone shooting position.
The rifle was later recovered after it was found wrapped in a blanket in a wooded area near campus.
Text Messages and Ongoing Proceedings
Prosecutors further allege that text messages between Robinson and his romantic partner, Lance Twiggs, reference retrieving the weapon after the shooting.
“Stuck in Orem for a little while longer yet,” Robinson allegedly wrote.
“Shouldn’t be long until I can come home, but I gotta grab my rifle still.”
Twiggs is cooperating with investigators and has not been charged.
Robinson is scheduled to appear in court on Friday for a hearing on a motion to exclude cameras from future proceedings.
If convicted of aggravated murder, he could face the death penalty.
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