In September 2015, the Defense Department gave the State Department some emails between Clinton and former Army General David Petraeus that Clinton had previously not turned over. However, in the months since, the State Department does not appear to have reached out to other departments to determine if they also have copies of emails Clinton failed to turn over. McClatchy Newspapers questioned over a dozen other departments. All of them either said they hadn’t been contacted by the State Department about this or failed to give an answer.
The State Department has not explained why it has failed to ask for help from other departments. It’s unclear how the Defense Department determined it had the emails between Clinton and Petraeus or why it turned them over. (McClatchy Newspapers, 12/31/2015)