JEFFERSON COUNTY, Mo (News First) – Three people were injured in a one-car crash last (Sunday) night in Jefferson County. The Missouri State Highway Patrol says the crash took place at Highway 141 and Highway 21 when a Chevy Malibu driven by 31-year-old Tony Willyard of Arnold was making a right turn onto the ramp from northbound 141 to northbound 21 when the car ran off the left side of the road and struck the guardrail facing. Willyard and his two passengers, 19-year-old Haley Auten of Fenton and 27-year-old Alexander Mundwiller of Arnold were all moderately injured. All three were taken to Mercy South Hospital in St. Louis.