The effort to delete Hillary Clinton’s emails was so obviously an effort to skirt transparency that the tech experts who handled the deletion joked about being part of a coverup.

IT employees from the Platte River Networks joked with one another about the “Hilary [sic] coverup [sic] operation” after Hillary Clinton’s staff with the State Department asked them to delete her emails beginning in Dec. 2014, according to the FBI’s latest information dump on Friday.

“Secretary Clinton, if you thought there was nothing wrong with deleting your emails, why did the staff of the company maintaining your server call the deletions a ‘cover-up’ operation?”

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Platte River, the firm tasked with managing Clinton’s private email server after she left her position as Secretary of State in 2013, was asked to “to modify the e-mail retention policy” of Clinton’s server because she had “decided she no longer needed access to any of her e-mails older than 60 days.”

One unnamed employee who joked about the “coverup” cooperated with the FBI during its investigation and was granted an immunity deal for protection.

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The fresh wave of troubling revelations into the Democratic presidential nominee’s handling of sensitive State Department communications comes just days before the first presidential debate on Monday in New York. The new revelations could provide Trump with additional ammunition to hammer Clinton Monday.

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“Secretary Clinton, if you thought there was nothing wrong with deleting your emails, why did the staff of the company maintaining your server call the deletions a ‘cover-up’ operation?” Jason Miller, the senior communications advisor for Donald Trump’s presidential campaign, said in a statement on Saturday.

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The Friday afternoon document dump from the FBI is becoming a pattern. This is the second dump of documents related to the agency’s investigation of Clinton dropped on a Friday afternoon — an indication the FBI is trying to suppress media coverage of the disclosures.