One of these: Bryan Pagliano, a former State Department employee who managed Clinton’s server while she was secretary of state. He defies the subpoena by failing to appear at all. Justin Cooper, a former Bill Clinton aide who helped Pagliano manage the server. He does answer questions for nearly two hours at the hearing. Paul Combetta, a Platte River Networks (PRN) employee, which managed the server from June 2013 until at least late 2015. He deleted and then wiped all of Clinton’s emails from her server. He fails to answer any questions and pleads the Fifth instead. Bill Thornton, another PRN employee who managed the server with Combetta. He also to answer any questions and pleads the Fifth instead.