On the 15th, the special investigation team summoned a representative from the design firm that wrote a report for the Ministry of Land, Infrastructure and Transport stating that the terminal point of the Seoul-Yangpyeong Expressway should be changed to Gangseo-myeon, where Kim Keon-hee's family owns land.
The special investigation team stated that around 10 a.m. that day, they summoned five representatives from the consulting firm, including Lee Sang-hwa, vice president of Donghae Total Engineering, in connection with the allegations of preferential treatment regarding changes to the Seoul-Yangpyeong Expressway line.
The allegations of preferential treatment for the Seoul-Yangpyeong Expressway involve the sudden change of the expressway terminal point in May 2023, the year after the inauguration of Yoon Suk-yeol's administration, from the existing Yangseo-myeon in Yangpyeong to Ganggang-myeon, where Kim Keon-hee's family owns 28 plots of land (22,663 square meters). It is reported that Donghae Total Engineering and Kyungdong Engineering participated in the project that included this route change.
The special investigation team summoned the vice president as a suspect for breach of duty and other charges. The team is believed to suspect that the company colluded with the Ministry of Land, Infrastructure and Transport to change the expressway terminal point. The company denied the allegations of preferential treatment, stating that there were no political considerations.