Prosecutors could pursue related criminal cases involving Epstein's associates or employees.
Attorney General William Barr says the Justice Department has already found "serious irregularities" at the federal jail where Jeffrey Epstein took his own life over the weekend.
Barr also issued a stern warning, saying the case was far from over. He said anyone who may have conspired with Epstein "should not rest easy."
Though Epstein was the only person charged in the indictment unsealed in July, the court papers described three unnamed employees who scheduled his alleged victims to provide "massages" that escalated to sexual acts and paid victims hundreds of dollars in cash.
For example, one person referred to in the indictment as "Employee-1" called girls who had previously been lured into encounters with Epstein to arrange future visits to his New York home.
Robbie Kaplan, an attorney for one of the alleged victims in the criminal case, said "the many victims of Jeffrey Epstein and his accomplices should not lose hope.
"We will continue to fight tirelessly on their behalf not only to seek justice, but also to ensure that all of the facts of his monstrous crimes become known to the world," she said.
"We need to expose the whole truth here so that crimes of this scale and scope never happen to any young girls (or boys) ever again."
The Associated Press contributed to this report.
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