South Korea's special inspection team, which investigated the emergency custody incident, said on October 15, that former President Yin Ziyu, who is in detention, was actively interrogated on the same day, but exercised the right to silence throughout, and did not respond to any questions.

Assistant Special Prosecutor Park Ji-young said at a press conference on the same day that the special inspection team summoned twice in September, but Yoon Seok Yue did not cooperate. She then applied to the court for an arrest warrant, which was approved on October 1. In conjunction with its trial schedule, the Seoul Detention Center where Yin Seek-yeon was detained originally planned to enforce the arrest warrant at around 8:00 on the 15th and escort him to the special inspection team for interrogation."However, after the prison guards informed the arrest warrant and the execution plan in advance, Yin Seek-yeon proposed to respond voluntarily to the trial, and the compulsory escort process did not start in the end."

Yin Xiyue's legal team said that Yin Xiyue had fully stated his position on the core issues raised by the special inspection team during two rounds of interrogation in June and July. Since his second arrest on July 10, Yin Xiyue has refused to be questioned by the special inspection team. This time, the initiative to be interrogated by the special inspection team is to "reduce the burden on the staff of the detention center".

In July this year, the Special Prosecutor's Group filed a lawsuit against Yin Ziyang on alleged abuse of office, infringement of State Commissioner's review rights, instruction to delete secret telephone call records, and blocking the execution of the arrest warrant.The Special Prosecutor's Group said that if the investigation went well, it was not possible to determine the specific time for Yin Ziyang's additional prosecution this month, "but because Yin Ziyang and other persons involved in the case were unwilling to testify, the investigation was delayed."