ABC News is reporting the military is investigating the commanding officer of four US soldiers who have been charged with murdering three Iraqi civilians. The soldiers have admitted to the killings but have claimed they were only following orders to kill all military-age males. In this new development, the soldiers’ commanding officer, Col. Michael Steele, is being investigated for inciting his troops to go on a killing spree. Col. Steele has had a celebrated military career. He was portrayed in the 2001 Hollywood film “Black Hawk Down”, about a US military unit fighting in Somalia in 1993. Sources told ABC News soldiers in Col. Steele’s unit believed they had been ordered to shoot all Iraqi men. Col. Steele apparently kept a “kill board” counting the number of Iraqis killed under his command and gave out commemorative knives to soldiers who killed Iraqis believed to be insurgents.