Side Street (1950)

A struggling young man with a pregnant wife is under pressure as he faces fatherhood and financial strain. When temptation gets the better of him, he impulsively steals an envelope from the office of a corrupt attorney, expecting only a small amount of cash. Instead, he finds $30,000 in blackmail money tied to murder. As he tries to put the money back, the situation turns dangerous, pulling him deeper into trouble.