Sampson said a private pathologist, Dr. Michael Baden, was allowed to observe the autopsy at the request of those representing Epstein.
A source familiar with the investigation told ABC News on Sunday that Barr instructed FBI deputy director David Bowdich to update Deputy Attorney General Jeffrey Rosen every three hours on their investigation and that Rosen has been in constant communication with Barr.
Barr also noted the case against Epstein was important to the Department of Justice, himself personally, prosecutors with the Southern District of NY as well as the victims. The two guards on duty were also reportedly "overworked". The person said one guard was working a fifth straight day of overtime and another was working mandatory overtime.
Epstein's death raises questions about how the Bureau of Prisons ensures the welfare of such high-profile inmates.
No foul play is suspected in Epstein's death, a federal official told CNN Saturday.
Paris prosecutor office said judicial officials are now checking whether an investigation into Jeffrey Epstein's case must be open on the French territory.
Authorities believe the multimillionaire financier hanged himself, a law enforcement source said. "This is routine practice", Barbara Sampson, the city's chief medical examiner, said in a August 11 statement. We are now learning of serious irregularities at this facility that are deeply concerning and demand a thorough investigation. Epstein was being held on federal sex trafficking charges.
Five years earlier, two Arabic men on trial - Ahmad Ajaj and Bilal Alkaisi - for the World Trade Center terror bombing attempted suicides in their cells at MCC.
An investigation must take place to determine how Epstein was able to die while in federal custody. Prosecutors accused him of sexually abusing dozens of underage girls.
For example, days after his arrest online memes and Facebook statuses wrongly claimed the Obama administration, in order to protect former President Clinton, forged a once-secret deal in 2008 in Florida that allowed him to plead guilty to soliciting a minor for prostitution to avoid more serious charges.
A Miami Herald series on the plea deal and the new charges in July renewed attention on the plea deal and spurred outrage against it.
"This case will continue on against anyone who was complicit with Epstein", the AG said.
"I was pretty stunned".
Brown said it's important to look at what happened with Epstein's suicide but also to keep the focus on the victims and on the case. "Any co-conspirators should not rest easy".