via.q13fox.com
Chicago mayor calls for calm as police release video of white officer shooting black teen
CHICAGO -- Mayor Rahm Emanuel is asking the people of Chicago to come together and work for peace as the city braces for potential unrest. But protesters took to the streets in a tense situation. Police released a video Tuesday showing the shooting of 17-year-old Laquan McDonald, who was killed by a white police officer in October 2014.