A northeast Iowa man has been convicted of shooting to death his stepfather at the home they shared. Allamakee County court records say a jury convicted 32-year-old John Quanrude last week of second-degree murder. He faces a minimum of 35 years and a maximum of 50 years in prison when he’s sentenced Oct. 1. Police say Quanrude had called for help at his mobile home in Waukon on April 16, saying there’d been an accidental shooting . Officers found 60-year-old Dean Russell lying face down on the home’s floor. A court document says Quanrude later told officers he’d fired a warning shot with a shotgun because Russell had been messing him and then shot Russell in the chest.