A former Islamic State fighter claims he was given orders to shoot women and children trying to flee Iraqi towns and villages under their control.
The extremists are battling with Iraq-led coalition forces on the road to the I.S. stronghold of Mosul.
The United Nations claims the terror group has killed more than 200 people and abducted tens of thousands of others in the fight.
Abu Ahmed is an I.S. prisoner now being held by Kurdish authorities:
