Attorney General Eric Holder denounces the shootings of Ferguson, Mo., officers and announces six pilot cities for a community trust and justice initiative. Andrew Harnik/AP hide caption

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Police in riot gear respond to demonstrators blocking traffic during a protest Wednesday outside the Ferguson Police Department in Missouri. As the protests were ending, someone fired at the police and wounded two officers. Michael B. Thomas/Getty Images hide caption

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Madison Mayor Paul Soglin addresses a crowd of protesters on Martin Luther King Boulevard in Madison, Wis., during a protest of the shooting death of Tony Robinson. Andy Manis/AP hide caption

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People rally in Union Square before marching through the street in protest to the Ferguson grand jury decision to not indict officer Darren Wilson in the Michael Brown case. Andrew Burton/Getty Images hide caption

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The Ferguson, Mo., police department is criticized in a new Justice Department report. The department says there is no evidence to warrant civil rights charges over the death of Michael Brown last August. BILL GREENBLATT/UPI /Landov hide caption

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A Philadelphia police officer demonstrates a body-worn camera being used as part of a pilot project last December. Matt Rourke/AP hide caption

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Demonstrators remember Michael Brown on Martin Luther King Jr. Day, marching from the apartment complex where Brown was killed to the Ferguson police station. A federal inquiry has found no evidence that officer Darren Wilson violated Brown's civil rights, sources tell NPR. Scott Olson/Getty Images hide caption

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Thousands gathered on the National Mall last week to protest the deaths of Eric Garner and Michael Brown. Some law students say their involvement in the protests means their exams should be postponed. Saul Loeb/AFP/Getty Images hide caption

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"I didn't want to fire things up," St. Louis County prosecutor Robert McCulloch says of his silence since announcing the grand jury's decision not to indict Ferguson police officer Darren Wilson in the shooting death of Michael Brown. Pool/Getty Images hide caption

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President Obama announces the creation of a policing task force Dec. 1 as Philadelphia Police Commissioner Charles Ramsey (left) and George Mason University criminology professor Laurie Robinson look on. Mandel Ngan/AFP/Getty Images hide caption

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St. Louis County Prosecutor Robert McCulloch announces the grand jury's decision not to indict Ferguson police officer Darren Wilson in the Aug. 9 shooting of Michael Brown, on Nov. 24. Cristina Fletes-Boutte/AP hide caption

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Police wearing riot gear walk toward a man with his hands raised Aug. 11 in Ferguson, Mo. Renewed calls for police departments to hire more minorities have followed the shooting there of a black man by a white police officer. Jeff Roberson/AP hide caption

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Members of the St. Louis Rams raise their arms to protest the grand jury decision in Ferguson, Mo., before a game last month. The players faced a backlash from St. Louis police and have been asked to apologize. L.G. Patterson/AP hide caption

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