A man in Tennessee has been accused of threatening to shoot up his stepdaughter's school after she was allegedly bullied by some of her classmates. Keith Burton was arrested on Thursday, February 19, and charged with felony threat of mass violence on school property and misdemeanor assault. Burton, 32, showed up at Caldwell-Guthrie Elementary School in Memphis on February 19, where he got into an argument with several students that he believed were bullying his stepdaughter, according to a police report viewed by WHBQ.