Prosecutors formally charged former top official Zhou Yongkang . The case is the first to be brought against a senior Chinese Communist Party leader since Xi Jinping took over as party chief in 2012. Former domestic security official is the most senior Chinese official to face corruption charges .
Prosecutors formally charged former top official Zhou Yongkang . Zhou charged with accepting bribes , abuse of power and leaking state secrets . Former domestic security official is the most senior Chinese official to face corruption charges .