A longtime East Texas radio personality has passed away in Longview. 48 year old Glenn Bumgardner was known by thousands of East Texas radio fans as "T-bone". He died of a heart attack at his home Friday morning. Bumgardner had a 30 year career in radio, working for numerous stations in Marshall, Longview and Tyler over the years. "T-bone" had several top rated sports talk shows over his career. Funeral services are pending.