Related Clues:

• G-men, e.g
• Counterfeiter trackers, in old lingo
• Agents Mulder and Scully, e.g
• Tax-evasion agts
• Some feds
• Homeland Security agts., e.g
• DEA agents, e.g
• Ottawa types?
• Smuggler's pursuers
• Al Capone chasers, informally
• Capone chasers
• Tax evasion agts
• Agts. going after tax evaders
• Beer barrel pokers of a century ago
• Witness protection programmers