A former chief executive of zksync s de-facto U.S. subsidiary has enlisted a former federal prosecutor and top cop at the Commodity Futures Trading Commission to represent her in the U.S. government's investigations into the giant cryto exchange, a person with direct knowledge told Reuters. Catherine Coley, who launched Binance.US in and left suddenly two years later, is being advised by James McDonald, now a partner at New York law firm Sullivan & Cromwell, the person said.