Park Seong-ju, former head of the National Investigation Service, issued a formal statement on 2026-06-30 denying all charges brought by the Gwangju District Prosecutors' Office regarding his conduct during the Jang Yoon-gi case investigation. ^[1] The Gwangju District Prosecutors' Office indicted Park Seong-ju and three other members of the National Investigation Service command on 2026-06-02 for abuse of authority and obstruction of rights. ^[2] Former National Investigation Chief Park Sung-joo was indicted by the Gwangju District Prosecutors' Office on 2026-07-11 for allegedly obstructing the right to exercise authority by abusing power and for allegedly ordering separate investigations into the Jang Yoon-gi case to avoid criticism. ^[3] Park Seong-ju stated that he had no reason to distort or minimize facts to cover up inadequate responses or avoid public criticism, claiming his instructions were standard security protocols. ^[4] Prosecutors alleged that Park Seong-ju ordered the separation of the Jang Yoon-gi rape case and a separate high school student murder case to prevent public criticism of the police organization. ^[5] Park Sung-joo claimed that the instruction to conduct separate investigations was a normal and routine work directive intended to ensure security and thoroughness by listing investigation items regarding motive and purpose that could not be fully proven within the detention period. ^[6] The prosecution determined that Park Sung-joo ordered separate investigations for the stalking and murder cases to avoid additional criticism amidst the poor response to the Namyangju stalking murder case, which caused delays in clarifying the rape and murder charges against Jang Yoon-gi. ^[7]