Park Chan-woon, the chairman of the Prosecutorial Reform Promotion Committee under the Prime Minister's Office, stated on the 9th that the argument for the complete abolition of supplementary investigations by prosecutors poses a significant risk of pushing the criminal justice process into uncontrollable chaos. He made these remarks on Facebook, emphasizing the importance of voicing his opinion amidst rapidly spreading calls for the complete abolition of direct supplementary investigations by prosecutors and ongoing discussions within the advisory committee.

He elaborated that prosecutors do not merely conclude cases by reviewing records from the police; they assess evidence omission, check for inconsistencies in statements, and determine charges to maintain prosecutions in court. He highlighted that most cases go through supplementary investigations, noting that even a single witness investigation or piece of additional evidence can significantly impact charging decisions. He also pointed out that solely relying on police requests for supplementary investigations can complicate handling certain cases, such as instances where victims challenge police non-prosecution decisions.

Park maintained that recognizing direct supplementary investigations does not equate to reverting to the past, where the prosecution acted as a comprehensive investigative body. He clarified that he advocates for a minimum level of fact-checking authority for the entity responsible for making charging decisions and maintaining prosecutions. He criticized calls for direct supplementary investigation rights while maintaining that an inability to verify victim and defendant claims directly would result in incomplete or passive prosecution outcomes, which the public would find unacceptable.