A 66-year-old St. Joseph woman was killed in an accident on April 25 in Platte County. The Missouri State Highway Patrol says a 2013 Peterbuilt crossed the median and attempted to make a U-turn when it was struck by a 2004 Cadillac, driven by 67-year-old Herbert D. Humphrey. Humphrey suffered serious injuries and was taken by EMS to Mosiac Life Care - St. Joseph Medical Center for treatment. A passenger, Cynthia J. Humphrey, was pronounced dead at the hospital.