section_path: Aftermath
section_name: Aftermath
paragraph_text: Aftermath
  
  Following his arrest and interrogation, authorities planned to detain Yoon at the Seoul Detention Center in Uiwang, Gyeonggi Province, located approximately five kilometers from the CIO office. Under South Korean law, authorities had 48 hours to secure a detention warrant, without which Yoon would be released. He was also placed in solitary confinement. An interrogation began at 11:00 am at the Gwacheon Government Complex, where Yoon was questioned in the presence of his defense attorney, Yoon Gap-geun. Security Service personnel were deployed throughout the Corruption Investigation Office building. Deputy Chief Prosecutor Lee Jae-seung conducted the initial two-and-a-half-hour interrogation session, followed by Chief Prosecutor Lee Dae-hwan after an hour-long break. The prosecutors prepared an extensive 200-page questionnaire for the investigation. However, Yoon reportedly refused to provide verbal responses or written statements to the prosecutors' questions. The process was not recorded due to Yoon's refusal to consent to video documentation.
  
  Yoon's staff released a "Letter to the People" to his Facebook account following the arrest, which had reportedly been written by him on paper earlier in 2025. Much of the letter focused on Yoon's justifications for declaring martial law, allegations of potential voting fraud and systemic vulnerabilities in South Korea's electoral system, emphasizing the successes of his policies, and his commitment to liberal democracy and individual freedoms against totalitarianism and tyranny of the majority.
  
  On 15 January, Yoon's criminal defense team filed a petition for a habeas corpus review with the Seoul Central District Court; however, on 16 January, the court denied the petition. On 16 January, his team filed an insurrection complaint against CIO chief Oh Dong-woon, National Office of Investigation head Woo Jong-soo, and several others over Yoon's arrest.
  
  On 17 January, acting PSS chief Kim Seong-hoon was detained on suspicion of helping block Yoon's arrest.
  
  On 19 January, the CIO banned Yoon from receiving visitors in detention apart from his lawyers. The ban on visits includes Kim Keon-hee and his family, and the CIO intended to prepare for the possibility that Yoon may file a petition with the court. The ban was lifted on 24 January.
  
  On 23 January, the CIO recommended that Yoon be charged with "leading an insurrection and abuse of power".
  
  On 24 January, the Seoul Central District Court dismissed a request by prosecutors to extend Yoon's detention until 6 February, citing lack of probable cause to continue the investigation under the prosecution's authority following the referral of the case by the CIO.
  
  On 26 January, Yoon was formally indicted on charges of leading an insurrection in connection with his imposition of martial law. The case was assigned by the Seoul Central District Court to its criminal collegiate division 25, which also handles martial law-related criminal charges against former defense minister Kim Yong-hyun, former national police commissioner Cho Ji-ho, and former Seoul Metropolitan Police Agency chief Kim Bong-sik.
  
  On 4 February, Yoon's defense team requested the court to cancel his arrest.
  
  On 8 February, police launched an investigation after details of a plot to stage a mob attack on the Constitutional Court hearing Yoon's impeachment trial emerged online.