Yoon attends hearing of impeachment trial President Yoon Suk Yeol looks pensive during the 10th hearing of his impeachment trial at the Constitutional Court in Seoul on Feb. 20, 2025, over his short-lived imposition of martial law in December.

South Korea’s impeached President Yoon Suk Yeol appeared in a Seoul court on Thursday for his first trial hearing on charges of insurrection in the country’s first criminal prosecution of an incumbent leader.

SEOUL — Ousted South Korean President Yoon Suk-yeol became the country's first sitting head of state to stand trial in a criminal case as hearings opened on Thursday regarding his bid to impose martial law.