By Mary Wisniewski CHICAGO (Reuters) - Chicago's police chief was ousted on Tuesday after days of protest over a white officer's shooting of a black teenager 16 times and the department's refusal to release a video of the killing for more than a year. Mayor Rahm Emanuel announced during a news conference that he had asked Garry McCarthy, police superintendent since May 2011, to resign. Emanuel also said he was creating a new police accountability task force.
