Chicago Mayor Rahm Emanuel, left, and Police Superintendent Garry McCarthy appear at a news conference on Nov. 24, 2015, in Chicago, announcing first-degree murder charges against police Officer Jason Van Dyke in the Oct. 20, 2014, death of 17-year-old Laquan McDonald. The city then released the dash-cam video of the shooting to media outlets after the news conference. (Associated Press) **FILE**
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