The predecessor of Abul-Hasan was in charge of what unit? 
Abul-Hasan Al-Muhajir:  Abul-Hasan is the successor of Abu Mohammad al-Adnani, who was killed while visiting the Aleppo frontlines in Syria in August 2016. Abu Mohammad al-Adnani:  Media reports in August 2016 suggested he was in charge of a special unit, known as the "Emni", that was established by ISIL in 2014 with the double objective of internal policing and executing operations outside the ISIL territory.
"Emni"