Related Clues:

• Eliot Ness, notably
• Counterfeiter catcher
• Counterfeiter's enemy
• -
• One of the Feds
• Crimebuster, informally
• F.B.I. operative
• Fed of a sort
• Gangster follower
• Agent
• Hoover, for one
• Eliot Ness, for one
• IRS employee
• Dillinger foe
• Certain U.S. Treasury Dept. employee