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A federal judge on Thursday denied Jeffrey Epstein’s request for bail pending his trial on sex-trafficking charges in Manhattan. As a result, Mr. Epstein, 66, a wealthy financier who owns a private jet, luxury homes around the world and a private island in the Caribbean, will have to spend months in a Manhattan jail that typically holds accused mobsters, drug dealers and terrorists.

The judge, Richard M. Berman of Federal District Court, agreed with prosecutors that Mr. Epstein was not only a flight risk, but posed a threat to others — particularly teenage girls — if released.

The judge’s strong rebuke of Mr. Epstein’s conduct and request to be allowed house arrest stood in sharp contrast to how the authorities in Florida had treated the financier in 2007.

That year, he reached a widely criticized deal that let him avoid federal prosecution on charges he sexually abused and trafficked minors. Instead, he pleaded guilty to state charges of soliciting a minor for prostitution and ended up serving 13 months in jail. He was allowed to leave the facility six a days a week, ostensibly to work.