Memories of Murder (2003)

1986. In a rural district of South Korea, two women have been recently raped and murdered. Working on the case are detectives Park Doo-man and Cho Yong-koo. Their efforts are impeded by some sloppy crime scene procedure by the police. Their methods of solving cases are also quite basic, essentially amounting to beating confessions out of suspects. All this leads to nothing and the police chief brings in a more sophisticated and intelligent detective from Seoul, Seo Tae-yoon. With his arrival the methods improve but they still don't have the killer. Then another woman is found murdered and a pattern emerges.