U.S. Attorney General William Barr has removed the acting director of the U.S. Bureau of Prisons from his position just over a week after millionaire financier Jeffrey Epstein took his own life while in federal custody.

Hugh Hurwitz's reassignment Monday comes amid mounting evidence that guards at the chronically understaffed Metropolitan Correctional Center in New York abdicated their responsibility to keep Epstein from killing himself while he awaited trial on charges of sexually abusing teenage girls. The FBI and the U.S. Justice Department's inspector general are investigating the 66-year-old's death.

Barr has named Kathleen Hawk Sawyer to succeed Hurwitz. She was the agency's director from 1992 until 2003.

Hurwitz is moving to a role as a deputy in charge of the bureau's re-entry programs, where he will work with Barr on putting in place the First Step Act, a criminal justice overhaul.

The bureau has come under intense scrutiny since Epstein's death, with lawmakers and Barr demanding answers about how Epstein was left unsupervised and able to take his own life on Aug. 10 while held at one of the most secure federal jails in the country.

A statement from Barr gave no specific reason for the reassignment. But Barr said last week that officials had uncovered "serious irregularities" and was angry that staff members at the jail had failed to "adequately secure this prisoner."

Epstein was found dead in his cell Aug. 10. He was awaiting trial on charges of sexually abusing teenage girls. (NY State Division of Criminal Justice Services/Reuters)

He ordered the bureau last Tuesday to temporarily reassign the warden, Lamine N'Diaye, to a regional office. and the two guards who were supposed to be watching Epstein were placed on administrative leave.

Those guards on Epstein's unit failed to check on him every half hour, as required, and are suspected of falsifying log entries to show they had, according to several people familiar with the matter, who also said both guards were working overtime because of staffing shortages.

Signed new will

Multiple people familiar with operations at the jail say Epstein was taken off the watch after about a week and put back in a high-security housing unit where he was less closely monitored, but was still supposed to be checked on every 30 minutes.

They spoke on condition of anonymity because they were not authorized to publicly discuss the investigation.

New court records show Epstein signed a will just two days before he killed himself.

A law firm representing Epstein's estate confirmed Monday that the papers were filed last week in the U.S. Virgin Islands.

The records put the estate at more than $577 million US.

A copy of the will was first published by the New York Post.

Whitey Bulger death

Hurwitz is a longtime bureaucrat who joined the bureau in 1998. He had also served in the U.S. Education Department and the U.S. Food and Drug Administration, and worked for NASA's office of inspector general. He returned to the prison agency in 2015 and was appointed acting director by Attorney General Jeff Sessions in 2018.

Hurwitz was in the position through the death of Boston mobster James (Whitey) Bulger, who was killed in a federal prison in West Virginia in October, just after he was transferred there. Lawmakers, advocates and even prison guards had been sounding the alarm about dangerous conditions at that facility for years, but there has been no public indication that federal prison officials took any action to address the safety concerns. Bulger's killing was the third at the facility within six months.

As director of the bureau, Hurwitz was responsible for overseeing 122 facilities, 37,000 staff members and about 184,000 inmates.

Hawk Sawyer was the first woman to lead the agency and held a number of jobs during nearly 27 years there. She worked as a psychologist at a federal correctional facility in West Virginia, was as an associate warden and then a warden at other facilities. She was ultimately nominated to lead the agency during Barr's first stint as attorney general in the early 1990s.

"Under Dr. Hawk Sawyer's previous tenure at the bureau, she led the agency with excellence, innovation, and efficiency, receiving numerous awards for her outstanding leadership," Barr said in a statement.

Barr also named Thomas Kane, a longtime bureau employee who has held a variety of leadership roles, as deputy director.