That Demon Within
A police officer doubts himself after saving the life of a notorious and ruthless killer. His actions come back to haunt him when the killer and his gang become suspects in a bloody armed robbery.
Starring Nick Cheung, Daniel Wu, Andy On, Dominic Lam Ka-Wah, Lee Kwok-Lun, Stephen Au, Chi Kuan-Chun, Christie Chen, Deep Ng, Ken Wong
Watch "That Demon Within" on Netflix released in 2014. It's a crime and thriller movie, and has a rating of 5.9 out of 10 from Imdb which is fairly okay for this kind of movie.