articleThe Brief A 56-year-old woman died Saturday afternoon after a riding lawnmower overturned into a creek and trapped her underneath. Tarrant County Sheriff's deputies and detectives are investigating the rollover incident, though initial findings suggest no criminal activity. A 56-year-old woman died Saturday afternoon after a riding lawnmower overturned into a creek and trapped her underneath, authorities said. The woman died at the scene. The Tarrant County Medical Examiner's Office has identified her as Krista Thompson.