50 CFR 10.22 - Law enforcement offices.
(a) Service law enforcement offices are located in Service regional offices. Regional office addresses are provided at 50 CFR 2.2. Mail should be addressed to “Special Agent in Charge, Office of Law Enforcement, U.S. Fish and Wildlife Service” at the appropriate regional office address. Telephone numbers for Service law enforcement offices follow:
(b) Any resident or official of a foreign country may contact the Service's Headquarters Office of Law Enforcement at the address provided at 50 CFR 2.1(b) or by telephone at 703-358-1949.