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Chicago's mayor appealed for calm as officials released a "chilling" video of the police shooting of a black teen, hours after the white officer was charged with murder. The graphic video is the latest in a string of police shootings caught on camera that have sparked mass -- and sometimes violent -- protests and engulfed the United States in a debate over racism and the use of deadly force by police. "I understand people will be upset and will want to protest when they see this video," Mayor Rahm Emanuel told reporters.
By Mary Wisniewski CHICAGO (Reuters) - A white Chicago policeman who shot a black teenager to death was charged with murder on Tuesday in a prosecution hastened in hopes of averting renewed racial turmoil over the use of lethal police force that has shaken the United States for more than a year. A highly anticipated video of the 2014 shooting, taken from a camera mounted on the dashboard of a police squad car, was released under orders from a judge hours after the officer in question, Jason Van Dyke, made his first appearance in court. The city braced for demonstrations but so far only a group of about 100 people were protesting about a mile south of Chicago's business district.