Yoon Seok-youl's lawyer said today (December 23) that President Yoon Seok-youl thinks that the impeachment trial procedure is more important than the investigation. South Korean investigative Institutions have summoned Yoon Seok-youl multiple times since December 11, sending subpoenas to the presidential office in Yongsan, Seoul, and the presidential residence in Hannam-dong, Seoul, through visits and mail, asking him to come in and cooperate with the investigation. However, Yoon Seok-youl has not cooperated and refused to accept the subpoenas sent by the Constitutional Court of South Korea, prosecutors, and the 'joint investigation headquarters.' (CCTV International News)