Frontier Investigator
- Tahun: 1949
- Negara: United States of America
- Genre: Action, Western
- Studio: Republic Pictures
- Kata kunci: brother, murder, mail
- Pengarah: Fred C. Brannon
- Pelakon: Allan Lane, Black Jack, Eddy Waller, Roy Barcroft, Gail Davis, Robert Emmett Keane
