This undated photo provided by the Harris County Sheriff's Office on Saturday shows Shannon J. Miles. Prosecutors in Texas are charging the 30-year-old man with capital murder in the killing of Darren Goforth, a sheriff's deputy who was gunned down from behind while filling up his patrol car at a suburban Houston gas station. AP hide caption

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Brad Miller was fired from the police force in Arlington, Texas, on Tuesday, after the department's chief said he was troubled with how Miller acted in the fatal shooting of an unarmed black man Friday. Reuters /Landov hide caption

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A number of state lawmakers have passed bills to bolster body cameras or have more streamlined investigations of police shootings. But State Rep. Michael Butler (D-St. Louis) says, "Folks in Missouri are afraid to have the race conversation." Michael Thomas/Getty Images hide caption

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Police and protesters square off outside the Ferguson Police Department, in March.Earlier in the day, the resignation of Ferguson police chief Thomas Jackson was announced in the wake of a scathing Justice Department report prompted by the fatal shooting of an unarmed black 18-year-old by a white police officer. Jeff Roberson/AP hide caption

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This combination made with file photos provided by the Madison, Wis., police department and Wisconsin Department of Corrections shows Madison Police officer Matt Kenny (left) and Tony Robinson, a biracial man who was killed by the officer. Kenny shot the unarmed 19-year-old in an apartment house on March 6. Uncredited/AP hide caption

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This undated photo released by the New York City Police Department shows officer Brian Moore. Moore, a New York City police officer, was shot in the head and critically wounded while attempting to stop a man suspected of carrying a gun. AP hide caption

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A makeshift memorial is seen on March 11 in Madison, Wis., in remembrance of 19-year-old Tony Robinson, who was fatally shot by a Madison police officer on March 6. Carrie Antlfinger/AP hide caption

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A Milwaukee prosecutor says no charges will be filed against a police officer who shot and killed Donte Hamilton in April. Here, Maria Hamilton holds posters used in rallies that vent frustrations about the death of her son. M.L. Johnson/AP hide caption

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An unidentified man is taken into custody Monday after performing an act of civil disobedience at the Ferguson, Mo., police station. About 50 were arrested during protests over the police shooting of Michael Brown in August. Charles Rex Arbogast/AP hide caption

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John Crawford III with his mother, Tressa Sherrod, in a photo released by the family. A special grand jury declined to indict officers in the fatal shooting of Crawford by police in an Ohio Wal-Mart in August. AP hide caption

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A memorial at the site where Michael Brown was shot, on Canfield Drive in Ferguson, Mo. Myles Bess/Youth Radio hide caption

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Protesters walk in front of a line of police early Wednesday as authorities try to disperse a demonstration in Ferguson, Mo. The St. Louis suburb saw less violence than on other recent nights of protests. Charlie Riedel/AP hide caption

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Dr. Michael Baden points to an autopsy diagram showing where bullets hit Michael Brown, as the family's attorneys Benjamin Crump (left) and Daryl Parks look on during a news conference Monday at the Greater St. Mark Family Church in Ferguson, Mo. Joe Raedle/Getty Images hide caption

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A man tries to recover from tear gas as people leave a McDonald's restaurant Sunday during a protest for Michael Brown in Ferguson, Mo. After police fired tear gas, people used bottles of water and milk to try to clear their eyes. Charlie Riedel/AP hide caption

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Law enforcement officers wait to advance Sunday morning after firing tear gas to disperse a crowd protesting the shooting of teenager Michael Brown in Ferguson, Mo. Authorities report one shooting and several arrests. Charlie Riedel/AP hide caption

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Ferguson Police Chief Thomas Jackson announces the name of Officer Darren Wilson as the man who shot and killed Michael Brown, 18, last Saturday. Lucas Jackson/Reuters /Landov hide caption

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