The Heater (2005)

Jerry is a not-quite-total-loser with little direction in his life and an adventurous wife. Having bounced around in a myriad of careers, Jerry becomes a Private Investigator, but he soon realizes that it isn't the exciting life the movies have made it out to be. Spending most of his time as a glorified delivery boy, work duties crash into his life as he is lead down a path of deception, drugs and violence.