A Justice Department official told the AP last week that several people, including guards, were not cooperating with the investigation.
However "unfortunately, there have been some delays because a number of the witnesses were not cooperative", he mentioned.
Investigations into the jail are being conducted by the Justice Department, FBI and the Inspector General.
From there, the women will have to follow the course they would have had to pursue even if Epstein had not created a trust: convince the judge that they are entitled to compensation as victims of sex crimes.
Hood, who also once served as the Bureau of Prisons' chief of internal affairs, said it was disconcerting that officials might have thought they were putting Epstein on a less intensive form of suicide watch. "A number of them required having union representatives and lawyers before we could scheduled interviews".
Disgraced billionaire Epstein took his own life in USA custody while awaiting trial for alleged sex trafficking.
The two guards reportedly falsified the logs to show that they had checked on Epstein as required, but these logs were contradicted by video evidence from a surveillance camera monitoring the hallway outside his cell.
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Once she arrived, she was allegedly coerced into performing sex acts for Epstein, sometimes alone and sometimes with another young woman, inside the offices of the non-profit, all while he was on work release, the lawsuit says. The person spoke to The Associated Press on condition of anonymity because grand jury proceedings are secret.
Epstein, 66, was arrested in July and accused of leading a sex trafficking operation in his homes in NY and Florida from 2002 to 2005, as part of which he abused dozens of minors, some of whom were just 14 years old.
Criminal defense attorney Randy Zelin on the controversy surrounding Jeffrey Epstein's will.
He was arrested on 6 July after landing in New Jersey on his private jet.
All said the abuse continued after Epstein reached a deal with Florida federal prosecutors in 2007.
She said attorneys for the women will go after Epstein's estate in the U.S. Virgin Islands, where the will was filed and where he owned two islands.
Andrew's former friend Epstein, who was later convicted of being a paedophile, killed himself in prison on August 10 after being charged with sex trafficking. While escorted by a private security team that viewed Epstein as a client rather than a prisoner, Palm Beach sheriff Ric Bradshaw approved his almost daily visits to an office at the Florida Science Foundation where women allege he arranged sexual encounters.