Colonel Kim Hyun-tae, who leads the country's elite 707th Special Mission Group, was in charge of troops attempting to stop lawmakers voting down Yoon's shock order.

SEOUL, Feb. 6 (Xinhua) -- South Korea's constitutional court held the sixth hearing of impeachment trial on President Yoon Suk-yeol on Thursday, with the arrested president being present for the fourth time. Yoon, dressed in a black suit and red necktie, presented himself at the courtroom in central Seoul at about 10:00 a.m. local time (0100 GMT).