Thief

Thief is a movie starring James Caan, Tuesday Weld, and Willie Nelson. An ace safe cracker wants to do one last big heist for the mob before going straight.
Frank is an expert professional safecracker, specialized in high-profile diamond heists. He plans to use his ill-gotten income to retire from crime and build a nice life for himself complete with a home, wife and kids. To accelerate the process, he signs on with a top gangster for a big score.