** FILE ** In this Nov. 30, 2009, file photo, a Seattle police officer helps block a street adjacent to a north Seattle park where police were searching for a suspect in the slaying of four police officers. Police in Washington state are asking the public to stop tweeting during shootings and manhunts to avoid accidentally telling the bad guys what officers are doing. The “TweetSmart” campaign began in late July 2014 by a coalition of nine agencies, including the Washington state patrol and the Seattle police. (AP Photo/Elaine Thompson, file)
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