Itaewon Homicide

I'll be honest, the only reason why I watched Itaewon Homicide was because of Jang Keun Suk(장근석) . It's quite a good movie, and JKS is good (as always!)... but anyone out there knows who the real killer was? Cause I can't guess. I know the issue is still unresolved in real life. But any clue?

Well, anyway found this link on youtube:

Kamsanida for the link shy2x17@youtube.