Under federal law either FBI or county sheriffs http://www.tribal-institute.org/lists/jurisdiction.htm Under federal law http://www.tribal-institute.org/lists/jurisdiction.htm Under federal law https://www.tribal-institute.org/lists/jurisdiction.htm either FBI or county sheriffs jurisdiction of Native nations A General Guide to Criminal Jurisdiction in Indian Country http://www.tribal-institute.org/lists/jurisdiction.htm all but banned a jurisdictional maze either FBI or county sheriffs