Possible Clues:

• Former blacklisting org.
• '50s Red Scare gp
• Blacklisting org.
• Defunct govt. anti-subversive group
• Org. that investigated Alger Hiss
• Old Red scare grp.
• Old antisubversive grp.
• Red Scare grp.
• Hollywood 10 interrogators
• McCarthy era investigative grp.