MASON CITY, IA – A 56 year old has died after a single vehicle rollover in Mason City. Just before 5 pm on Monday, the Cerro Gordo Sheriff’s Office responded to a report of a vehicle rollover on 275th and Lark Avenue, involving just one car. Officials say that man who was killed is David Gambell of Forest City. Gambell was headed west on 275th when he lost control of his vehicle. He was ejected from the car and taken to Mercy Medical Center North Iowa by Mercy Air Med, where he was pronounced dead. It is under investigation.