FTX co-founder and ex-engineering chief Nishad Singh pleaded guilty to six criminal fraud charges in Manhattan federal court on Tuesday, becoming the latest in Sam Bankman-Fried’s inner circle to admit participating in wrongdoing at the bankrupt crytocurrency exchange. Appearing before U.S. District Judge Lewis Kaplan, Singh pleaded guilty to wire fraud, conspiracy to commit fraud, conspiracy to commit money laundering and conspiracy to defraud the U.S. by violating campaign finance laws.