A US professor, Mo Tan (Daniel Hyun-myeong), facing defamation charges related to President Lee Jae-myung, failed to appear for a scheduled police investigation on Monday. Tan reportedly expressed a desire to avoid media exposure as the reason for his absence. Investigators had planned to question Tan regarding allegations of damaging the President’s reputation. Authorities are now working to reschedule the investigation and discuss alternative arrangements with the professor. This case centers on claims made by Tan concerning President Lee. The investigation continues as officials attempt to secure Tan’s cooperation and proceed with the inquiry.