Dylann Roof is competent to represent himself when the jury that found him guilty of killing nine black parishioners at a South Carolina church returns to court to decide his punishment, a judge has ruled. Dylann Roof, who is charged with killing nine people at a church in South Carolina Dylann Roof is competent to represent himself when the jury that found him guilty of killing nine black parishioners at a South Carolina church returns to court to decide his punishment, a judge has ruled.