Yoo was taken into custody on and confessed to murdering as many as 19 people, initially, specifically targeting affluent senior citizens and masseuses. Yoo had raised suspicions by calling a massage parlor where several employees had recently gone missing after receiving similar phone calls, so the owner of the massage parlor, accompanied by several employees and a single police officer, went to the agreed-upon meeting place. The police officer left before Yoo arrived, and Yoo was apprehended by the employees of the massage parlor. Another police officer placed handcuffs on Yoo after he was detained by the massage parlor employees.