Just weeks after reports of a bombshell claim by the defense for Tyler Robinson, who is accused of assassinating conservative activist Charlie Kirk last year, there is a new twist in the case.

According to multiple reports, documents filed by the defense in the case claimed the bullet used in the assassination doesn’t match the rifle that has been tied to Robinson.

TMZ reported that Robinson’s defense team is arguing that there is “a discrepancy between the ballistic evidence and the weapon prosecutors say is connected” to him.