The FBI released documents on Friday from its investigation into whether former secretary of state Hillary Clinton improperly stored or transmitted classified e-mail. Included were notes from interviews with employees of Platte River Networks, the Denver firm the Clinton family hired to host their personal e-mail server four months after she left office.

According to the FBI documents, in December 2014, former chief of staff Cheryl Mills told a Platte River employee that Clinton no longer needed access to e-mails older than 60 days. She also instructed the person modify the e-mail retention policy on Clinton’s server to reflect this change. An unknown Clinton staff member said “sh/e did not want the .PST file after the export and wanted it removed from the PRN server.” But the Platte River employee didn’t delete the files or make the retention-policy change until four months later.

After a March 2, 2015, New York Times story “Hillary Clinton Used Personal Email Account at State Dept., Possibly Breaking Rules,” Mills sent an e-mail to Platte River Network “referencing the preservation request from the Committee on Benghazi.”

Sometime between March 25 and 31, 2015, the Platte River employee had an “Oh expletive moment” that the files weren’t deleted. He told the FBI that he then “deleted the Clinton archive mailbox from the PRN server and used BleachBit to delete the exported .PST files he had created on the server system containing Clinton’s e-mails,” according to the FBI report.

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BleachBit is software that scrubs a file out of existence to “prevent recovery” and “hide traces of files deleted by other applications,” according to Bleachbit.org’s site.

The employee told the FBI in a May 3, 2016 interview that “he was aware of the existence of the preservation request and the fact that it meant he should not disturb Clinton’s e-mail data on the PRN Server.”

Clinton told the FBI she was never deleted nor did she instruct anyone to delete e-mails and was unaware of Platte River’s deletions from March 2015.

The FBI noted that Platte River’s attorney advised this worker not to comment based on attorney-client privilege.

Reached late Friday, Platte River’s lawyer Kenneth Eichner said he had not looked at the FBI documents or spoken to his client yet and did not want to comment until after he had done so.

In July, FBI Director James B. Comey said while the investigation revealed potential violations, “our judgement is that no reasonable prosecutor would bring such a case.” He declined to press for charges.

But at the same time, Comey didn’t leave Clinton blameless. He said, “There is evidence that they were extremely careless in their handling of very sensitive, highly classified information.”

Platte River was subpoenaed last week by congressional committees investigating Clinton’s e-mails. The company said it had already turned over all Clinton’s computer data to FBI officials last year and allowed its employees to be interviewed.

The committees’ letter to Platte CEO Treve Suazo pointed out at least three instances when Platte refused to provide the committees with documents or allow employees to be interviewed. It also noted that the congressional effort has a different focus from the FBI’s criminal investigation — one that could “merit changes to federal law.”