Unsealed forensic analysis has reportedly linked some evidence at the scene of conservative activist Charlie Kirk's assassination to a gun allegedly used by Tyler Robinson . Kirk was fatally shot at Utah Valley University in Orem on September 10 during a question-and-answer session. Days after the shooting, authorities arrested 22-year-old Robinson, whom officials said had confessed to the crime to his father. He is in custody on charges of aggravated murder, obstruction of justice and felony