Clayton County Commissioner Sonna Singleton tells WSB-TV police in Georgia are investigating and incident over a monument dedicated to Michelle Obama‘s great-great-great-grandmother, Melvinia Shields that was knocked over in subBlack Atlanta. The monument was pushed over and will need to be inspected for cracks. The report was aired Monday. Officials say Shields was born into slavery in the mid-1800s and later settled in Rex, Ga., “” about 15 miles southeast of downtown Atlanta. Officials say the monument was installed about a year ago, and the county commission organized a celebration later this month to recognize Shields’ connection to the White House.