The Pledge (2001)

At the beginning of this film, this seems like it’s supposed to be a crime drama. Jack Nicholson is a police chief on the eve of his retirement who tags along to investigate a young girl’s murder. After a suspect commits suicide, the rest of the department washes their hands of the case, but Jack has promised the young girl’s parents that he would find her killer and isn’t satisfied. Thus Jack becomes a man on a single minded mission, not caring who or what could get in his way. It’s a study of one man’s obsession, spiraling down a labyrinth of possibilities and unable to move on to the next chapter of his life. It’s also got some great one scene cameos with the likes of Helen Mirren, Mickey Rourke, Lois Smith, Harry Dean Stanton, and Vanessa Redgrave.