The Chaser, is a 2008 South Korean action thriller film starring Kim Yoon-seok and Ha Jung-woo, inspired by Yoo Young-chul, a real-life Korean serial killer, and self-confessed cannibal, he admitted to murdering how many people?
Yoo Young-chul:  Although he admitted to murdering 21 people, mostly prostitutes and wealthy old men, the Seoul Central District Court convicted him of 20 murders (one case was dismissed on a technicality).
i don't know