BEIJING (Reuters) - A paranoid killer or a persecuted scapegoat -- Gu Kailai, the woman at the centre of China's most politically explosive criminal case in a generation, remains an enigma. A court in the central city of Hefei handed the wife of ousted Chinese politician Bo Xilai a suspended death sentence on Monday, effectively life imprisonment, after she confessed to killing British businessman Neil Heywood, an ex-family friend. ...