Decorated US soldier faces hearing over massacre

By NBC News wire services SEATTLE -- A U.S. Army soldier accused of killing 16 Afghan villagers in a drunken rampage in March faces the military version of a preliminary hearing starting on Monday to determine if there is sufficient evidence for a court martial. U.S. Army Staff Sergeant Robert Bales, a decorated veteran of four combat tours in Iraq and Afghanistan, is accused of walking off his base under cover of darkness and opening fire on civilians in their homes in at least two villages. The shooting of mostly women and children in Afghanistan's Kandahar province marked the worst civilian slaughter by U.S. forces since the Vietnam War and eroded already strained U.S.-Afghan ties after over a decade of conflict in the country. Bales faces 16 counts of premeditated murder and six counts of attempted murder, as well as charges of assault and wrongfully possessing and using steroids and alcohol while deployed. If convicted, he could face the death penalty. Read more US news stories on NBCNews.com The hearing at Joint Base Lewis-McChord in Washington state is expected to last two weeks. Military prosecutors are expected to show video from a surveillance blimp. Part of the hearing will be held at night to allow video testimony from witnesses in Afghanistan. Bales will be present at the hearing but was not expected to answer questions. He was confined at a military prison in Kansas from March until he was moved in October to Lewis-McChord, where Bales' infantry regiment was based. Karilyn Bales, the wife of Army Staff Sgt. Robert Bales, spoke exclusively with NBC's Matt Lauer, telling the TODAY anchor that the news about her husband is 'very unbelievable.' 'Sanity board' John Henry Browne, Bales' civilian lawyer, has suggested that Bales may not have acted alone and may be suffering from post-traumatic stress disorder. Browne told Reuters last month he and an Army prosecutor planned to question five to 15 Afghan villagers and military personnel as key witnesses from Kandahar Air Field. How Staff Sgt. Bales' lawyers are fighting for his life Bales also has two military defense counselors, Major Gregory Malson and Captain Matthew Aeisi. Malson represented Army Sergeant William Kreutzer, who was sentenced to life in prison three years ago for killing an officer and wounding 18 U.S. soldiers in a 1995 shooting spree. Separately, Bales is also subject to a review of his mental fitness to stand trial, often referred to as a "sanity board." The Army has not disclosed the status of that review. Aref Karimi / AFP - Getty Images More than ten years after the beginning of the war, Afghanistan faces external pressure to reform as well as ongoing internal conflicts. The March shooting highlighted discipline problems among U.S. soldiers from Lewis-McChord, which was also the home base of five enlisted men from the former 5th Stryker Brigade charged with premeditated murder in connection with three killings of unarmed Afghan civilians in 2010. Four of the men were convicted or pleaded guilty in court-martial proceedings to murder or manslaughter charges and were sentenced to prison. Charges against the fifth were dropped. In August, U.S. Defense Secretary Leon Panetta directed a panel of experts to assess whether reforms were needed in the way the military justice system handles crimes committed by U.S. forces against civilians in combat zones. Reuters and The Associated Press contributed to this report. More content from NBCNews.com: Pulpit politics: Pastors endorse candidates, thumbing noses at IRS Boy falls into zoo exhibit, mauled to death by African painted dogs Weed wars: If states legalize pot, will feds still crack down? Delphi retirees say government betrayed them Nonvoters: They're too busy, fed up or say their vote doesn't count Video: Marathon runners racing to help out Sandy victims Follow US news from NBCNews.com on Twitter and Facebook