A sanctioned Dutch oil trader at the center of a dispute involving allegations of CIA ties, Russian crude shipments, and multimillion-dollar fraud has sued a prominent U.S. corporate intelligence firm for libel and slander - the latest twist in a saga that has captivated the commodities world. As reported by the Financial Times, Niels Troost - the only European trader sanctioned for dealing in Russian oil - filed a lawsuit in the Southern District of New York against the Arkin Group, a New York-based corporate intelligence consultancy founded by…