Fond du Lac police say a taxi driver died from natural causes not from injuries after his taxi cab crashed into a tree earlier this month. Seventy five year old Richard Kunasch died this week at Theda Care Medical Center in Neenah. The crash happened January 4 on Hawthorne Drive.just east of Buttermilk Drive. An autopsy determined that Kunasch died from natural causes from underlying medical issues including cardiac disease and not from the traffic crash. Kunasch’s death will not be listed as a traffic fatality.