Disgraced FTX founder Sam Bankman-Fried has had his $250m (£197m) bail revoked and has been sent to jail after alleged witness tampering.
US District Judge Lewis Kaplan made the decision after prosecutors said he had tried to harass a key witness in his fraud case last month.
Bankman-Fried, 31, was charged with defrauding investors in the US after he allegedly stole billions of dollars – spending tens of millions on political donations.
Mr Kaplan said he had concluded there was probable cause to believe Bankman-Fried had tried to tamper with witnesses at least twice” since he was arrested in December.
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The former billionaire has been under house arrest at his parents’ home in California, since he was extradited from the Bahamas.
The $250m bail package severely restricted his internet and phone usage, but two weeks ago prosecutors demanded he be sent to jail, alleging he violated those rules by giving The New York Times the private writings of a key witness, Caroline Ellison, his girlfriend and former CEO of Alameda Research, a cryptocurrency trading hedge fund that was one of his businesses.
Prosecutors argued he was trying to sully her reputation and influence prospective jurors who may be summoned for his trial in October.
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In December Ellison pleaded guilty to criminal charges carrying a potential penalty of 110 years in prison – she has agreed to testify against Bankman-Fried as part of a deal that could lead to a more lenient sentence.