NEW : Cemetery office manager , About 300 gravediggers charged . NEW : Rev . Emmett Till says there should be `` special place in hell '' for suspects . NEW : three graves may have been dug up , sheriff says . Jesse Jackson , other prominent African-American buried at cemetery .
NEW : Cemetery office manager , three gravediggers charged . NEW : Rev . Jesse Jackson says there should be `` special place in hell '' for suspects . NEW : About 300 graves may have been dug up , sheriff says . Emmett Till , other prominent African-Americans buried at cemetery .