Sam Bankman-Fried, co-founder of FTX Cryptocurrency Derivatives Exchange, departs from court in New York, US, on Tuesday, Jan. 3, 2023.
CNN  — 

Federal prosecutors said FTX founder Sam Bankman-Fried contacted the former general counsel of the crypto trading platform earlier this month in a move they say may constitute witness tampering.

A spokesperson for Bankman-Fried declined to comment.

Prosecutors with the US attorney’s office for the Southern District of New York asked the judge to amend Bankman-Fried’s bail conditions to prohibit him from communicating with current or former employees of FTX or its sister hedge fund Alameda research unless he is with his attorney or has approval from the government. They also want the judge to block Bankman-Fried from using any encrypted communication devices out of concerns he will obstruct the ongoing investigation.