The man who once ran one of the world’s biggest cryptocurrency exchanges, Sam Bankman-Fried, has been found guilty of fraud and money laundering.
The jury delivered its verdict after less than five hours of deliberations to signal an end to a month-long trial in New York.
It concludes a stunning fall from grace for the 31-year-old former billionaire and one of the most public faces of the crypto industry.
Bankman-Fried was arrested last year after his firm, FTX, went bankrupt.
He now faces decades in prison. His sentencing has been set for 28 March next year.
“Sam Bankman-Fried perpetrated one of the biggest financial frauds in American history – a multibillion-dollar scheme designed to make him the king of crypto,” US attorney Damian Williams said in a statement after the verdict.
“This case has always been about lying, cheating and stealing, and we have no patience for it,” he added.
Prosecutors had accused Bankman-Fried of lying to investors and lenders and stealing billions of dollars from cryptocurrency exchange FTX, helping to precipitate its collapse. They charged him with seven counts of fraud and money laundering.
He had pleaded not guilty to all the charges, maintaining that, while he had made mistakes, he had acted in good faith.
After the verdict Bankman-Fried’s lawyer Mark Cohen said: “We respect the jury’s decision. But we are very disappointed with the result.
“Mr Bankman-Fried maintains his innocence and will continue to vigorously fight the charges against him,” he added.
A spokesperson for Bankman-Fried did not immediately respond to a BBC request for comment on whether he planned to appeal against the verdict.
Three of his former close friends and colleagues, including his ex-girlfriend Caroline Ellison, pleaded guilty and agreed to testify against him in hopes of reducing their own sentences.
They are to be sentenced at a later date.
“The government won this case by putting a lot of pressure on cooperators, getting deals with them very early on and trying this case in a very streamlined way,” said former federal prosecutor Renato Mariotti.
“Instead of overcomplicating the case, turning it into some complicated crypto case, they tried it as a garden variety fraud.”
The prosecution presented evidence that Bankman-Fried’s crypto trading firm Alameda Research received deposits on behalf of FTX customers from the early days of the exchange, when traditional banks were unwilling to let it open an account.
Instead of safeguarding those funds, as Bankman-Fried repeatedly pledged to do in public, he spent the money to repay Alameda lenders, buy property and make investments and political donations.
Five of the charges Bankman-Fried was found guilty of carry a maximum prison term of 20 years, with a five year maximum on the other two charges.
That creates a potential maximum sentence of 110 years, and although it is unlikely the judge will actually impose that, Bankman-Fried is expected to face a sentence lasting decades.
Barbara Fried and Joseph Bankman, parents of FTX founder Sam Bankman-Fried, reacts after the verdict is read in Bankman-Fried’s fraud trial over the collapse of the bankrupt cryptocurrency exchange at federal court in New York City, U.S., 2 November, 2023, in this courtroom sketch.
When FTX went bankrupt last November, Alameda owed the firm $8bn (£6.5bn).
“He took the money. He knew it was wrong. He did it anyway, because he thought he was smarter and better and that he could figure his way out of it,” assistant US attorney Nicolas Roos said in his closing arguments.
Bankman-Fried made the risky move of taking the stand in his own defence, hoping to convince jurors that prosecutors had failed to prove he acted with criminal intent.
“There was bad judgment,” said his lawyer Mr Cohen, offering a portrait of a nerdy mathematician who was overwhelmed as his companies grew rapidly. “That does not constitute a crime.”
Bankman-Fried defended the money transfers between his firms as “permissible” and testified that he was largely unaware of the financial hole described by his deputies until a few weeks before the FTX collapse last year.
The downfall left many customers unable to recover their funds.