FILE – In this Tuesday, Nov. 24, 2015, file photo, a protester holds a sign as people rally for 17-year-old Laquan McDonald, who was shot 16 times by Chicago Police Department Officer Jason Van Dyke in Chicago. McDonald, whose name demonstrators are shouting as they march the streets and plan to shut down the city’s glitziest shopping corridor on Friday, lived a troubled life full of disadvantages and at least one previous brush with the law. (AP Photo/Paul Beaty, File)