Former Joint Chiefs of Staff Chairman Kim Myung-soo will undergo a pre-arrest interrogation on June 15, 2024 [1].

These legal proceedings target the highest levels of South Korea's military leadership and examine allegations of internal instability and the mishandling of state secrets. The outcomes could determine the legal accountability of officials involved in the 12.3 emergency martial law incident.

Kim Myung-soo is under investigation for alleged involvement in an insurrection [1], [2]. The special prosecutor team led by Kwon Chang-young is investigating suspicions that the Joint Chiefs of Staff participated in the 12.3 emergency martial law [2]. According to the prosecutor's team, Kim Myung-soo likely recognized the possibility of a martial law declaration as early as July 2024 [2].

Separately, former Defense Minister Kim Yong-hyun is facing trial for the alleged leak of military secrets [1]. The court is scheduled to deliver the first-instance verdict for Kim Yong-hyun on June 19, 2024 [1].

The investigation into the leak of military secrets involves the names of more than 40 individuals, including Intelligence Command agents [1].

"The former Joint Chiefs of Staff Chairman Kim Myung-soo, whom the comprehensive special prosecutor pointed out as having participated in the insurrection, will undergo a pre-arrest interrogation tomorrow," a YTN anchor said [1].

Regarding the other case, the anchor said that the first-instance sentence for former Defense Minister Kim Yong-hyun's military secret leak charges will occur on June 19 [1].

Former Joint Chiefs of Staff Chairman Kim Myung-soo will undergo a pre-arrest interrogation on June 15, 2024.

The simultaneous legal challenges facing these two former military leaders signal a broad effort by special prosecutors to uncover the chain of command behind the 12.3 emergency martial law. By pursuing both insurrection charges and military leak allegations, investigators are attempting to establish whether the military's involvement was a result of coordinated planning or the unauthorized dissemination of sensitive intelligence.