Related Clues:

• ATF agents, e.g
• Regulatory group
• T-men, e.g
• Officers from DC
• A.T.F. agents, e.g
• Government agents, informally
• ATF employees
• Gangsters' counterparts, informally
• G-men and the like
• Capone's foes
• J. Edgar's agents
• DEA investigators, e.g
• Govt. enforcers
• Some special agents, briefly
• RICO enforcers