A U.S. military investigation in August 2003 cleared Philip DeCamp and the other two soldiers concerned, Sgt. Shawn Gibson and Capt. Philip Wolford, of wrongdoing, saying they acted properly because they believed they were firing on enemy troops. According to the inquiry, American commanders reacted to the tank's firing on the building immediately with anger and consternation, with Lieutenant Colonel DeCamp, the battalion commander, berating Captain Wolford, his subordinate, for giving Sergeant Gibson clearance to fire. However the inquiry never clarified why he or anybody else were unable to prevent the attack from taking place.