AdvertisementExcavation Begins For Possible Mass Grave From 1921 Tulsa Race MassacreJuly 14, 2020Brakkton BookerfacebookEmailThe city of Tulsa, Okla., has begun a test excavation to determine if land on city-owned property is the site of a mass grave from the 1921 Tulsa Race Massacre. (1921 Graves/City of Tulsa)