The Special Investigation Team, led by Chief Chae Soo-yang, concluded its investigation into allegations of external pressure surrounding a customs drug smuggling case, declaring that the accusations were unfounded and that most suspects would not face charges. This investigation stemmed from allegations that numerous customs officials were involved with drug smuggling activities and that the police and prosecutorial leadership, as well as the presidential office, had intervened to conceal the case. It was noted that over the course of the investigation, tensions arose particularly with a police officer named Baek Hae-ryong, who was involved in raising these initial allegations and faced potential disciplinary action as a result of the findings.

The investigation was initiated last year and has seen significant focus on the supposed collusion between customs officials and drug trafficking organizations, particularly linked to cases from Malaysia. The investigation culminated when it was reported that the previous presidential office had also exerted influence to suppress the investigation, notably involving First Lady Kim Geon-hee's family. However, the Special Investigation Team reported that there was no concrete evidence addressing these claims, including no records proving any communications between the presidential office and investigators.

With over 30 locations searched and forensic examinations of 46 mobile devices conducted, nothing linked high-ranking police officials or the presidential office to any misconduct emerged. The conclusion of this investigation reflects a significant development in public trust regarding accountability in government investigations, casting doubt on initial claims of external influence from the presidential office, while further complicating the reputations of those involved as no evidence was found to substantiate the allegations.