A recent investigation into the wall collapse incident in Osan City, Gyeonggi Province, has found that deficiencies were present in all phases of design, construction, and maintenance. Officials from Osan City held a press conference to highlight that the actual construction conditions indicated that some sections did not meet the safety standards required by the design criteria. The city argues that the structural vulnerabilities formed during the design and construction stages may have significantly contributed to the tragedy.

The collapse occurred on July 16 of last year when heavy rainfall caused the wall of an elevated road to collapse, which resulted in the death of a driver whose vehicle was crushed by the rubble. The city maintained that the affected section underwent five thorough safety inspections from 2023 until just before the incident, all rated as insufficient (B-grade). Furthermore, the city indicated that follow-up investigations revealed concerning deficiencies in the material used in backfilling the collapsed area, which was only confirmed after the incident.

In responding to the situation, the city has asserted that preventive actions were taken on the day of the incident, including pothole repairs, traffic control, and issuing disaster alerts. The necessity for these explanations comes amid an ongoing investigation against Osan's mayor for alleged violations of the Serious Accidents Punishment Act, emphasizing the serious implications of the findings. The Ministry of Land, Infrastructure, and Transport corroborated that failures across all aspects of design, construction, and maintenance contributed to the incident, further complicating the city's defense against the charges it faces.