DANBURY, Conn. -- Caroline Ellison, a former top executive in Sam Bankman-Fried ’s fallen FTX cryptocurrency empire, began her two-year prison sentence Thursday for her role in a fraud that cost investors, lenders and customers billions of dollars.

A former FTX executive, charged with writing computer code for his imprisoned former boss Sam Bankman-Fried, is helping the U.S. government uncover stock market fraud.

Gary Wang, FTX's former chief technology officer, will be sentenced next week for his role in the crypto firm's collapse. His efforts may keep him out of prison.

The former FTX executive who wrote computer code that enabled his imprisoned former boss Sam Bankman-Fried to steal billions of dollars from cryptocurrency customers has built software to help the U.S.