Nothing to see here… move along.

The former aide to Hillary Clinton who helped set up and maintain her private email server has declined to talk to the FBI and the State Department inspector general’s office, as well as a congressional committee, invoking his Fifth Amendment right not to incriminate himself, sources familiar with the investigation confirmed to Yahoo News.

The move by Bryan Pagliano, who served on Clinton’s 2008 campaign and later as a technology officer in the State Department, to decline to cooperate in two federal probes considerably raises the stakes in the Clinton email investigation, the sources said. It confronts the Justice Department with a decision about whether to grant him immunity in exchange for his testimony — a move that could be taken only were the department to escalate the probe into a full-scale criminal investigation, the sources said.