Frontier Investigator
- År: 1949
- Land: United States of America
- Sjanger: Action, Western
- Ettromsleilighet: Republic Pictures
- Nøkkelord: brother, murder, mail
- Regissør: Fred C. Brannon
- Cast: Allan Lane, Black Jack, Eddy Waller, Roy Barcroft, Gail Davis, Robert Emmett Keane