A former client of Boies Schiller Flexner and Dentons US claimed in a $300 million lawsuit filed Friday in New York federal court that he was the victim of a Racketeer Influenced and Corrupt Organizations Act scheme to generate outsized legal fees for the firms, including being coerced into lying to an International Chamber of Commerce tribunal.

According to the complaint filed in the U.S. District Court for the Southern District of New York, Frank Corsini, president of Liberty Eco Energy, engaged Boies Schiller in arbitration proceedings before an ICC tribunal to enforce an invalid power purchase agreement created by Dentons partner James Costan regarding an investment in Senegal.