A Violent Prosecutor
검사외전 (original)
Byun Jae-wook, a hot-tempered prosecutor known for his violent method, is arrested when a suspect he was interrogating is found dead. Unable to prove his innocence, Jae-wook is sentenced to serve 15 years in prison. While in prison, he meets Chi-won, a good-looking swindler who knows the truth about Jae-wook's case. Jae-wook pulls all his resources to get Chi-won out of prison to take revenge.
Starring Hwang Jung-min, Gang Dong-won, Lee Sung-min, Park Sung-woong, Kim Eung-soo, Park Jong-hwan, Han Jae Young, Han Jae-yeong, Kim Won-hae, Kim Byeong-ok
Watch "A Violent Prosecutor" from streaming services Tubi TV, Roku Channel released in 2016. It's a crime and comedy movie, and has a rating of 6.7 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.