A protester chants a derogatory slogan towards Chicago policemen as protesters march down State Street in Chicago, Illinois November 24, 2015. Jason Van Dyke, a white Chicago policeman who fatally shot Laquan McDonald, a black teenager, was charged with murder on Tuesday, hours before authorities released a long-awaited video that shows the youth walking away from officers as he is slain by a volley of 16 gunshots. The graphic footage of last year's shooting, taken from a camera mounted on the dashboard of a police car and made public under orders from a judge, sparked mostly peaceful street demonstrations in Chicago on Tuesday. REUTERS/Frank Polich