A lawyer for Sam Bankman-Fried signaled Thursday that the onetime cryptocurrency darling is challenging the validity of new charges added to an indictment after he agreed to be brought to the United States in December from the Bahamas rather than fight extradition. Attorney Mark Cohen told a Manhattan federal court judge that his 31-year-old client, a founder of the cryptocurrency exchange FTX, was pleading not guilty to new charges lodged against him in recent weeks in what a prosecutor has labeled as one of the biggest frauds in American history. But Cohen quickly added that although he was pleading not guilty to ... (full story)