Via Fox News:
Former Hillary Clinton IT specialist Bryan Pagliano, a key witness in the email probe who struck an immunity deal with the Justice Department, has told the FBI a range of details about how her personal email system was set up, according to an intelligence source close to the case who called him a “devastating witness.”
The source said Pagliano told the FBI who had access to the former secretary of state’s system – as well as when – and what devices were used, amounting to a roadmap for investigators.
“Bryan Pagliano is a devastating witness and, as the webmaster, knows exactly who had access to [Clinton’s] computer and devices at specific times. His importance to this case cannot be over-emphasized,” the intelligence source said.