Cartel • Noun
1. A group of independent business organizations formed to regulate production, pricing, and marketing of goods by the members
2. A group of parties, factions, or nations united in a common cause; a bloc.

Case officer • Noun
A staff officer of an intelligence agency.

CIA • Noun, Abbrev.
Central Intelligence Agency.

Counter Intelligence • Noun
The activity of preventing the enemy from obtaining secret information.

Covert • Adj.
Concealed, secret, disguised.