President Yoon Suk-yeol has been arrested on suspicion of being the ringleader of insurrection and is refusing to cooperate with the investigation by the Corruption Investigation Office (CIO). The CIO announced that there is a high possibility it will request a detention warrant for President Yoon at Seoul Western District Court and added that preparations for filing the warrant are nearly complete. President Yoon refused the CIO's request for further investigation, and attorney Seok Dong-hyun argued that President Yoon sufficiently stated his position during the first day of questioning. The CIO plans to request a detention warrant for President Yoon by applying charges of being a ringleader of insurrection and abuse of authority.