The Chronicles of Evil (2015) on Netflix

Plot summary

Choi Chang-sik is a homicide detective with a strong record, and his promotion is only days away. After a celebratory drink with colleagues he falls asleep in a taxi and wakes on a remote mountain trail, where the driver comes at him with a knife. The struggle leaves the driver dead. He means to call the police, but his superior phones to remind him to keep out of trouble until the promotion, so he conceals the scene and leaves. The next day the driver's corpse is hanging from a crane outside the police station, in view of everyone, and Choi is placed in charge of the inquiry under heavy press coverage. He tries to steer the investigation away from himself and remove evidence, while rookie detective Cha Dong-jae watches him with mounting doubt.