A former Marine sergeant recounted Tuesday that his unit in Iraq killed more than 30 innocent Iraqi civilians over a two-day period in March 2003. Marine Sgt. Jimmy Massey, recalled the killings during his testimony before a Canadian tribunal that is deciding whether U.S. war resister Jeremy Hinzman should be given refugee status in Canada. Hinzman fled to Canada in January after he refused to fight in Iraq. He has maintained the war in Iraq was illegal and that fighting in it would make him a war criminal. On Tuesday, Massey told Canada’s Immigration and Refugee Board, “I do know that we killed innocent civilians.” He then recounted how US forces once fired up to 500 rounds of ammunition into four cars filled with civilians after they failed to stop at a checkpoint. On the next day he witnessed Marines shooting dead four unarmed Iraqi demonstrators. Massey said “I was never clear on who was the enemy and who was not. When you don’t know who the enemy is, what are you doing there?” Massey went on to say “I was deeply concerned about the civilian casualties. What they were doing was committing murder.”