Dylann Roof, the self-described white supremacist who gunned down nine black churchgoers in a Charleston church, offered no apology or motive for his actions on Wednesday as a jury began considering whether to sentence him to death.

The same federal jury that found Roof guilty last month of all 33 federal hate crime charges in connection with the June 2015 killings is now tasked with deciding whether he will face execution or life in prison.

"There's nothing wrong with me psychologically," insisted Roof, who has chosen to represent himself in the proceedings, rebuffing advice from his lawyers and the presiding federal judge.