Well, Hillary Clinton cannot really be held responsible for the assassination of the American convoys to Libya in the year 2012. During this time period, there was a state of complete unrest in Libya. It was under civil war. While the American convoys named J. Christopher Stevens and Sean Smith were on their stay in Libya, their compound was attacked by members of the Ansar al-Sharia.
This occurred at about 9:40 PM on the 11th of September. Nevertheless, Hillary Clinton had no control over the situation as whatever happened was unfortunate. Stevens became the first U.S. ambassador to have died during duty since the year 1979.