A stunning new twist has erupted in the murder case of Turning Point USA founder Charlie Kirk.

According to a bombshell court filing, the bullet recovered during Kirk’s autopsy may not match the rifle allegedly used by prime suspect Tyler Robinson — a revelation that could shake up one of the most closely watched murder cases in the country.

Robinson, 22, is facing capital murder charges and could be sentenced to death if convicted in the September 10 killing at Utah Valley University. But now, his defense team says a federal firearms analyst with the Bureau of Alcohol, Tobacco, Firearms and Explosives was unable to identify the fatal bullet as having come from the rifle tied to Robinson.

That explosive claim was included in a motion filed Friday as Robinson’s attorneys asked the court to delay the preliminary hearing by at least six months.

The defense says the case is far more complicated than it may appear on the surface. In addition to the ballistic issue, attorneys argued that DNA evidence collected by investigators may take extensive time to review because several items reportedly contain multiple DNA samples.

In the filing, Robinson’s legal team said sorting through that evidence will require help from a range of specialists, including forensic biologists, geneticists, engineers, and statisticians. They argued that determining how many people may have contributed to mixed DNA samples — and whether federal agencies used proper scientific methods — is a deeply involved process.

The attorneys also said prosecutors have already turned over roughly 20,000 electronic files, including audio, video, and written records.

They made clear that reviewing all of it will not happen quickly.

According to the filing, Robinson’s defense team has already poured major resources into processing the evidence and identifying what may still be missing, but attorneys admitted that a full review will take hundreds of hours.

They also said Robinson has not yet received all of the forensic case files and raw data needed for experts to independently examine the scientific reports prosecutors plan to use at the preliminary hearing.

Defense attorneys and prosecutors previously met on March 12, and based on that meeting, Robinson’s legal team believes the state plans to present several separate buckets of evidence through just three law enforcement witnesses.

That evidence is expected to include DNA and ballistic reports from the FBI and ATF, social media records, testimony about the crime scene and search efforts, and statements from Robinson’s parents and roommate. The defense also pushed back on what it described as a significant amount of hearsay from officers who will not testify directly.

Prosecutors have alleged Robinson drove about three hours from his home to the university campus to kill Kirk, who was 31 years old.

Authorities say Robinson was ultimately turned in by his own father, Matt, after recognizing a rifle shown in police images released during the manhunt. Investigators have said the gun had originally been given to Robinson by his grandfather.

Kirk’s killing sent shockwaves through conservative circles and sparked an outpouring of grief at Turning Point USA headquarters. But with this latest filing raising major questions about the physical evidence, the case may be headed for an even more explosive fight in court.