South Korean investigators asked prosecutors to indict the country’s detained President Yoon Suk Yeol over his short-lived imposition of martial law last month, as it accused him of rebellion, abuse of power and obstruction of parliament.

South Korean President Yoon Suk Yeol appeared in a Seoul court for his impeachment trial Tuesday, defending his short-lived martial law bid and denying charges that he ordered the military to drag lawmakers away.

Yoon was arrested in a dawn raid last week on insurrection charges, becoming the first sitting South Korean head of state to be detained in a criminal probe.