Frederick Warburg & Federal Reserve Ownership

At the time of the Kennedy Assassination, Frederick Warburg was a senior partner of Kuhn Loeb. Kuhn Loeb was a co-owner of the Federal Reserve.(His uncle Paul Warburg was the financial mastermind that created the Federal Reserve). John F. Kennedy was in the process of freeing the U.S. of the grip of the Federal Reserve at the time of his murder. (Kuhn Loeb would later merge with Lehman Brothers, another co-owner of the Federal Reserve). Did Frederick Warburg use his power and influence to thwart Kennedy's attack on The Fed? When did the Kennedy's become enemies of the Federal Reserve?