NEW YORK – Federal prosecutors in New York accused Jeffrey Epstein of witness tampering Friday, alleging that he wired $350,000 to two people who might testify against him in court.

The U.S. Attorney's Office for the Southern District of New York made the disclosure in a letter that asked Manhattan U.S. District Judge Richard Berman to hold the financier without bail pending trial on charges of sex trafficking and sex trafficking conspiracy involving young girls.

The prosecutors also said records recently obtained from a financial institution show that Epstein, 66, is worth more than $500 million and earns at least $10 million per year. They did not identify the institution.

The disclosures came in a government filing that argued Epstein should remain in detention pending trial on charges that he sexually exploited dozens of minors, including girls as young as 14, from 2002-2005 in New York City and Palm Beach, Florida.

The filing also responded to a Thursday proposal from defense lawyers that suggested Epstein could remain free pending trial by pledging a mortgage on his Manhattan townhouse worth roughly $77 million, plus a financial hold on a private jet. The proposal said Epstein would pay for 24-hour private security and Global Position System monitoring to ensure he would remain inside the palatial townhouse.

However, prosecutors noted that the mansion is subject to forfeiture. They also said he has not completed a financial affidavit, under penalty of perjury, to accompany his bail application

"Against this backdrop of significant – and rapidly-expanding – evidence, serious charges, and the prospect of a lengthy prison sentence, the defendant proposed to be released on conditions that are woefully inadequate" the prosecutors argued. "The court should reject the defendant's application and order him detained pending trial.

In accusing Epstein of witness tampering, the government lawyers cited a Palm Beach Police report that said the parent of one of the financier's victims was driven off the road by a private investigator.

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"In the incident the defendant now claims was not attributable to or authorized by him, the contemporaneous police report indicates that pressure tactics were at the very least coordinated closely with individuals in the defendant's orbit," the prosecutors wrote.

Separately, the government letter said one of Epstein's victims previously reported that she was contacted through a source who was in contact with the financier who "assured (the victim) that she would receive monetary compensation for her assistance in not cooperating with law enforcement."

"Those who help him will be compensated and those who hurt him will be dealt with," the victim was told, prosecutors wrote, citing the Palm Beach Police report.

The alleged witness tampering continues "to this day," the government added.

Prosecutors said records obtained from a financial institution show that Epstein wired $100,000 from a trust account he controlled to an individual named as a possible co-conspirator in the 2008 non-prosecution agreement he reached with federal prosecutors in Florida over similar sex-trafficking charges.

The records show that, days later, Epstein wired $250,000 from the same account to another person identified as a potential co-conspirator, prosecutors wrote.

The withdrawals came amid a Miami Herald series of stories that examined Epstein's conduct, the circumstances of his state court conviction on sex-related charges in Florida, and the federal non-prosecution agreement, the New York government lawyers wrote.

Criticizing the sparse details in Epstein's bail proposal, the prosecutors wrote: "It might not be immediately apparent to a reader ... that the defendant is extravagantly wealthy and worth, according to records relating to the defendant recently obtained by the Government from a financial institution, more than $500 million."

Even if Epstein were to sacrifice all of his current assets, "there is every indication that he would immediately be able to resume making millions or tens of millions of dollars per year outside of the United States," prosecutors alleged.

"He already earns at least $10,000,000 per year," prosecutors said, citing records from the financial institution. "There would be little to stop the defendant from fleeing, transferring his unknown assets abroad, and then continuing to do whatever it is he does to earn his vast wealth from a computer terminal beyond the reach of extradition."

Berman is scheduled to hear oral arguments about potential bail for Epstein from the prosecutors and defense lawyers during a Monday morning hearing in New York.