The story of how the server came into existence became clearer thanks to witness interviews known as 302s. Though they were highly redacted, the bureau files include new details Pagliano revealed in a June 24 interview with the FBI.

In that interview, Pagliano said it was longtime Clinton Foundation aide Justin Cooper who asked him to build the server “in the fall of 2008” and that Pagliano completed the work in early 2009.

Source: It’s Alive: FBI files reveal how Clinton server was created in K Street lab | Fox News