October 28, 2014: The State Department formally asks Clinton to turn over her emails from her time as secretary of state.

Starting in July 2014, State Department officials privately reached out to Clinton’s lawyers and advisers to gain access to her work-related emails on her private server. Face-to-face meetings on the issue followed in August. But with the emails still not appearing, on October 28, 2014, the Department formally asks Clinton for the emails. (The Washington Post, 3/27/2016)