The Fugitive (1963)

Working as a stock clerk in a department store, Kimble witnesses his boss, Martin Rowland, accidentally kill a business associate in the parking lot after hours. When Kimble learns that a local vagrant found near the crime scene is the prime suspect, Kimble anonymously phones Rowland to get him to confess to the murder. But Rowland and his wife, Ginny, thinking that the caller is blackmailing them, hires the store detective, Angstrom, to find the person ""blackmailing"" Rowland.