Charlie Kirk Case: Does 'Inconclusive' Bullet Evidence Clear Suspect Tyler Robinson? Experts Push Back on Claims

A recent court filing in Utah has sparked confusion about the murder case of Charlie Kirk, after claims spread that the bullet test cleared suspect Tyler Robinson. But experts say the result, described as “inconclusive,” does not prove Robinson’s innocence or rule out the rifle tied to him.

Robinson’s lawyer said in a March 27 filing that federal investigators could not link a bullet fragment from Kirk’s autopsy to the rifle connected to Robinson. This led to news tickers and social media posts suggesting that the weapon did not match. Some public figures have also amplified the claims, raising doubts about the case.

However, forensic experts and prosecutors say that the interpretation goes too far.

"When the results of a bullet fragment analysis come back as 'inconclusive,' that does not mean that the rifle did not fire the bullet," Christopher Ballard, a spokesperson for the Utah Country Attorney's Office and part of the prosecution team, said. He said the fragment may not be sufficient to confirm or rule out a match.

The bullet evidence itself has not been released publicly. Earlier filings cited a federal report that reached the same inconclusive finding after comparing the fragment to the rifle.

Experts say such results are common in firearm cases, especially when bullets are damaged. High-speed rifle rounds often break apart or deform on impact, making detailed analysis difficult.

To match a bullet to a gun, examiners study marks left during firing. These marks form when the bullet travels through the barrel, which has spiral grooves that spin it. If enough of the bullet remains, those markings can be compared to test-fired rounds. However, in many cases, there simply is not enough material.

"If there's enough of the projectile recovered, then it can be examined," Bernard Zapor, retired Bureau of Alcohol, Tobacco and Firearms (ATF) special agent in charge and faculty associate at Arizona State University's School of Criminology & Criminal Justice, said.

Another expert called the interpretation “extremely misleading”. She explained that if the markings clearly differed, investigators would have ruled the rifle out. An inconclusive result means that determination was not possible.

The report is just one part of the case. Prosecutors say other evidence ties Robinson to the crime. According to court documents, his DNA was found on the rifle, ammunition, and a towel used to wrap the weapon.

Authorities say Robinson also turned himself in the day after the killing and told a roommate to delete messages about the incident.

As of now, further testing is underway, including additional bullet comparisons.

Charlie Kirk was assassinated on September 10, 2025, at Utah Valley University in Orem, Utah. Kirk was fatally shot in the neck, and the suspect, James Robinson, was arrested two days later.