INTERNAL REVENUE SERVICE
Helena
Criminal Investigation Divisions
10 West 15 Street
Helena, MT 59626
Phone: (406) 441-1039
Fax: (406) 441-1016
Tim Daruk, Special Agent
Ron Herrera, Special Agent
Billings
Criminal Investigation Divisions
2900 4th Avenue North
Billings, MT 59101
Phone: (406) 247-7446
Fax: (406) 247-7485
N. Clyde Rhoades, Group Manager
Loretta Rodiguez, Special Agent
Kenneth Gunn, Special Agent
Michael Mayott, Special Agent
David Steintl, Special Agent
Missoula
Criminal Investigation Divisions
2681 Palmer Street, Suite F
Missoula, MT 59808
Phone: (406) 728-9127
Fax: (406) 721-3291
Martin"Marty" Halko, Special Agent
Janice Harrington, Special Agent
John Nielsen, Special Agent