Riot police stand on guard as demonstrators protest against the shooting dead of teenager Michael Brown in Ferguson, Missouri, on Wednesday. A witness in the case told local media that Brown had raised his arms to police to show that he was unarmed before being killed.  Photograph: Mario Anzuoni/Reuters

The police officer who fatally shot an unarmed black teenager in Ferguson, Missouri has been named as Darren Wilson.Speaking at a press conference out(...)