What is the name of the movie

I can not remember this movie I saw . It is about a detective or something like this , and a killed woman , in movie this detective and her husband try to find who killed her , and they find the killer in a photo i do not remember good. In movie is also a friend of this detective which die . The husband of the killed wife waits at the station train for her killer and at the end of the movie detective find out that husband took the killer and has keep him as slave at his house.The detective tell this story from his youngtime Thank you