A Knoxville man was killed Saturday after a heavy equipment trailer he was working on fell on him. Just before 5:30 pm Saturday emergency crews responded to a call in the 1000 block of Story Drive for a male who was trapped under a trailer. When rescue personnel arrived, they located and began life saving measures on 53-year-old Richard Shilling, of Knoxville. Mr. Shilling had been working under a heavy equipment trailer when the jack supporting the trailer failed and landed on him.  Despite rescue personnel’s best efforts Mr. Shilling succumbed to his injuries and was pronounced deceased at the scene. The Marion County Sheriff’s Office, Columbia EMS, and Mercy Air Ambulance all responded to the scene.