I'd also add that Obama can just pardon her and the investigation would end. Again, though, that would not bode well for her election chances. It's not exactly an admission of, or indication of, guilt, but in the court of public opinion it would be.
http://www.bloomberg.com/politics/a...rget-clinton-aides-after-final-e-mail-release Brian Fallon, a spokesman for Clinton, called the myriad investigations into former aides and campaign officials, “nothing more than fishing expeditions by right-wing groups that have devoted themselves to attacking the Clintons for decades.” The FBI is a right wing group devoted to attacking the Clintons. The whole article is enlightening.
http://www.politico.com/story/2016/02/bernie-braces-for-decision-day-219944 It's pretty much over for the Un-Democratic Party.