ISTANBUL, TURKEY - MARCH 31: Turkish security forces take security measures at the Istanbul courthouse where prosecutor Mehmet Selim Kiraz was taken hostage by unknown gunmen on March 31, 2015 in Istanbul, Turkey. Mehmet Selim Kiraz had been handling the case of Berkin Elvan, who was critically injured during 2013's Gezi Park protests and died in March 2014 after being in a coma for 269 days. (Photo by Metin Pala/Anadolu Agency/Getty Images)
