It will later be widely reported that after State Department Inspector General Steve Linick finds four emails with what he deemed classified information in a random sample of 40 of Clinton’s emails, Linick and another inspector general will formally ask the FBI for a “security referral” into Clinton’s emails in July 2015. The FBI’s investigation will formaly begin on July 10, 2015.
And while that is true, CNN will report in August 2015 that the FBI already began investigating Clinton’s emails in May 2015 due to one email being released on May 22nd that appeared to contain intelligence that should have been classified.
That email, written by State Department official Tim Davis on April 10, 2011, and forwarded to Clinton, contained the latest information about plans to evacuate US government officials from Libya that day, as well as the latest US military intelligence on the civil war raging near those officials. (CNN, 8/20/2015)