Employees at Platte River Network, the firm tapped to manage Hillary Clinton's emails in 2013, sent emails describing the 'Hilary [sic] coverup [sic] operation' after Clinton's staff asked them to begin wiping emails in Dec. 2014.

The revelation came in 189 pages of FBI documents made public Friday evening amid controversy over the five immunity deals extended to aides involved in the case — including one that protected a key employee at Platte River from prosecution.

The unnamed employee told FBI agents that his reference to the "cover-up" was a joke.

His comment came in December 2014, just days after Clinton's staff handed 30,000 of her emails over to the State Department.

Clinton's team asked the IT aide to change the settings on the former secretary of state's server so all emails older than 60 days would be automatically deleted.