As a major city in the area, Augusta was a center of activities during Reconstruction and after. In the mid-20th century, it was a site of civil rights demonstrations. In 1970 Charles Oatman, a mentally disabled teenager, was killed by his cellmates in an Augusta jail. A protest against his death broke out in a riot involving 500 people, after six black men were killed by police, each found to have been shot in the back. The noted singer and entertainer James Brown was called in to help quell lingering tensions, which he succeeded in doing.