How to write about a Character based on a movie?

Max Payn, because that too easy. He lost his baby daughter and wife, because junkies killed them. After that he just is very sad, don't talk much and is a vigilante going for a revenge. He alse worked for NYPD, but got suspended. I'm not sure if all that is correct, but watch the movie. Or play the game, they have the same character.