The Audubon County Sheriff’s Office announced Friday that they are investigating a case of vandalism at the Oakfield Cemetery, east of Brayton.  The damage is believed to have happened within the past couple of weeks. A head stone was knocked over and several vases were damaged on other stones.  The amount of damage is unknown at this time. Anyone with information about this incident is asked to contact the Audubon County Sheriff’s Office at 712-563-2631 or Audubon County Crimestoppers at 712-563-2234.