The U.S. is building its case against FTX founder Sam Bankman-Fried

From his mansion in the Bahamas, FTX founder Sam Bankman-Fried has pretty much spoken with anyone who'd give him a platform in order to explain why his crypto empire failed.

U.S. federal prosecutors would very much like to know what happened too, which is why there are now multiple investigations into FTX and its founder over...