As a result of the coverage on the 21st, Yoo Ah-in was confirmed to have appointed a law firm belonging to Lawyer from Kim & Chang Law Office. Lawyer, appointed by Yoo Ah-in, has been a prosecutor for 11 years since 2006 and joined the Kim & Chang law firm in December 2017, now a member of the 'o' law firm, not Kim & Chang. The law firm also belongs to Lawyer, a former prosecutor who served as deputy prosecutor of the Supreme Prosecutors' Office, Drug Supervisor and Organized Crime Supervisor after taking his first step into public office 28 years ago. Yoo Ah-in attends the Police as a suspect on Monday and receives a Survey. It is the first time that Police has summoned Yoo Ah-in since the United States of America entered the Incheon International Airport on May 5 and conducted Drug tests at the same time. The Survey will be conducted as a private recall Survey, and it is reported that there will be no announcement of a separate position. Currently, Yoo Ah-in faces four types of Drug Oral administration charges. The National Institute of Scientific Investigation reported to the Police that Yoo Ah-in's hair and urine were positive for Drugs such as Propofol, hemp, cocaine, and ketamine. Seoul Police Agency Drug Crime Investigation Service conducted a search for seizure of home in Hannam-dong, the residence of Yoo Ah-in, and home in Itaewon-dong, the address of resident registration. Police also summoned Yoo Ah-in, a manager and acquaintance who was at the airport when he was picking hair at the time of his arrival in the United States of America, as a reference.