Related Clues:

• Bureau employee
• Untouchable, e.g.
• Bad bill collector?
• Fed under Ness
• Dillinger chaser
• Hoover employee
• Crime fighter
• FBI employee, slangily
• Fed who tracks down money launderers
• Tax investigator, for short
• Guy in the FBI
• Federal agent investigating taxes, informally
• Kidnapper nabber, maybe
• Fed. felon foiler
• One trying to eliminate bad notes