- Epstein, 66, was denied bail and faced up to 45 years in prison on federal sex trafficking and conspiracy charges.
- According to the charges - which Epstein denied - the girls, some as young as 14, were given hundreds of dollars for sex acts.
Guards in Jeffrey Epstein's unit were working "extreme overtime" in the hours before his death, leaving gaps in his supervision, US media report.
The Department of Justice and the FBI have both launched investigations into Epstein's death amid questions surrounding the circumstances.
Epstein, 66, was denied bail and faced up to 45 years in prison on federal sex trafficking and conspiracy charges.
A post mortem examination into Epstein's death was performed Sunday.
New York City's chief medical examiner, Dr Barbara Sampson, said that more information is needed before the cause of death is determined.
Dr Sampson said that a city medical examiner conducted the examination on Sunday while a private pathologist observed, at the request of Epstein's representatives.
Corrections officers at New York's Metropolitan Correctional Center had been forced to work overtime to make up for staffing shortages, according to US media.
One of the corrections officers was reportedly on his fifth straight day of overtime shifts, while another guard had been forced to work overtime, Serene Gregg, president of the American Federation of Government Employees Local 3148, told the Washington Post.
"If it wasn't Mr Epstein, it would have been somebody else, because of the conditions at that institution," she told the newspaper.
"It wasn't a matter of how it happened or it happening, but it was only a matter of time for it to happen. It was inevitable. Our staff is severely overworked."