The bullet which killed Charlie Kirk may not match the rifle used by prime suspect Tyler Robinson, according to a bombshell new court filing. Wonderwall.com can reveal Robinson's defense attorneys now argue the Bureau of Alcohol, Tobacco, Firearms and Explosives "was unable to identify the bullet recovered at autopsy to the rifle allegedly tied to Mr Robinson." Bid To Push Back Preliminary Hearing Six Months Defense team filed motion to push the preliminary hearing back at least six months.