Confession of Murder

Confession of Murder is a 2012 South Korean action thriller film written and directed by Jung Byung-gil. Inspired by the Hwaseong serial murders. The film stars Jung Jae-young, Park Si-hoo, Bae Seong-woo, Jung Hae-kyun, Kim Young-ae, Choi Won-young and, Jo Eun-ji.The film depicts a man who claims responsibility on a book I Am the Murderer he publishes for a serial murder case 15 years ago which have fallen out of the statute of limitations, and a police officer who failed to capture the criminal of its case.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.