Answer:
Law enforcement. This list was published by FinCEN and is not exhaustive but may be helpful.
• Criminal investigative Services of Armed Forces
• The Bureau of Alcohol, Tobacco, and Firearms
• Attorney General
• District Attorney
• State’s attorney
• Drug Enforcement Administration
• The Federal Bureau of Investigation
• Internal Revenue Service
• Tax Enforcement agencies at state level
• Office of Foreign Assets Control
• State or local police department
• US Attorney
• Immigration and customers Enforcement
• US Postal Inspection Service
• U S Secret Service