The Big Clock (1948)

When powerful publishing tycoon Earl Janoth commits an act of murder at the height of passion, he cleverly begins to cover his tracks and frame an innocent man whose identity he doesn't know, but who just happens to have contact with the murder victim. That man is a close associate on his magazine whom he enlists to trap this "killer" - George Stroud. It's up to George to continue to "help" Janoth, to elude the police and to find proof of his innocence and Janoth's guilt.