In 2012, the news website Gawker filed a Freedom of Information Act (FOIA) lawsuit to get the emails between key Clinton aide Philippe Reines and numerous journalists. Reines was Senior Advisor and Press Secretary for Clinton while she was secretary of state.
However, even though a key part of Reines’ job was emailing journalists, the State Department responded in 2013 that “no records responsive to your request were located.”
Then, after more legal action, on August 17, 2015, the State Department says they found 17,855 emails between Reines and the journalists, which they promise to hand over.
It turns out that, like Clinton, Reines exclusively used a private email for his government work, and, like Clinton, this meant no records were found in any requests for his emails. (US News and World Report, 8/17/2015) (Gawker, 3/3/2015)