The Messed Up Truth Of The Raincoat Killer

By then, the police were closing in on the killings, so Yoo "took a break" from the murders, according to Grave Reviews. This coincided with the time that he started dating a female sex worker. When she found out about his crimes and broke up with him, he made the decision to kill escorts from then on as a way to seek revenge.

Between May and July 2004, Yoo may have killed as many as 11 sex workers by luring them to his apartment, then either choking them or killing them with a hammer. He would then mutilate the body and sometimes decapitate the victim, scattering body parts in humid forested or mountain areas where he hoped they would decompose quickly (via Absolute Crime). Later on, when in custody, he would claim that he ate part of his victims' livers "to cope with his epilepsy" and "to cleanse his spirit" (as reported via The ChoSun), although police at the time could not verify those claims.

As reported via Talk Murder, police would also say later that he "used axes, knives, and scissors to cut [the bodies] into pieces" and "tore off the victims' fingertips so there would be no prints to identify them." Later on, he would confess to also murdering other victims, including two street vendors whom he thought had scammed him and stabbing a girl he mistook for an escort.