inspectors are a grade below captain, instead of at least one grade above. New York State Police staff inspectors are senior commissioned officers holding the rank above major and below lieutenant colonel. The North Carolina Department of Transportation's Division of Motor Vehicles License and Theft Bureau uses the title of inspector for its sworn state law enforcement agents/investigators. The inspectors of this agency investigate motor vehicle theft, title and odometer frauds, state issued identification and driver's license frauds, as well as regulate and inspect motor vehicle dealerships, repair shops, tow and storage facilities, and emissions and safety inspection centers. The NC DMV License and Theft Bureau is the state's oldest law enforcement agency and was formed in 1921 to combat vehicle theft with the rising sales of Ford's Model T. The agency has kept the title designation of inspector for traditional purposes. The Oregon Liquor Control Commission uses the title of inspector for sworn law enforcement agents who investigate violations of the Liquor Control Act and other related crimes. Federal agencies In the Federal Bureau of Investigation (FBI), an inspector is a special agent whose main duty is inspecting local field offices and resident agencies to make sure they are operating efficiently. Since FBI inspectors are not tied to any particular field office, they have, in the past, also been used as troubleshooting investigators on major cases. Joseph Sullivan was perhaps the best-known of the Bureau's major case inspectors and served as the model for Inspector Lew Erskine, the fictional character played by Efrem Zimbalist Jr. in the 1965–1974 ABC TV series The FBI. Samuel P. Cowley was an FBI inspector in the late 1920s and 1930s who assisted in bringing down notorious gangsters such as John Dillinger in the early 1930s, before his death in November 1934 in a gun battle with Baby Face Nelson. The United States Marshals Service and the Drug Enforcement Administration employ similar positions, but they primarily serve as internal affairs investigators. The United States Park Police changed the rank of inspector to the rank of major, which is between captain and deputy chief. In the Postal Inspection Service, inspector is the name given to 1811 job series criminal investigators, better known as special agents in most other federal law enforcement agencies. Prior to 2003, the US Customs Service (USCS) and the Immigration and Naturalization Service (INS) had uniformed law enforcement employees called customs inspectors