The NYPD recently launched a study into what's causing a rise in shootings in the city. Commissioner William Bratton says it will examine a lot of factors, not just stop-and-frisk. Andrew Burton/Getty Images hide caption

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A crowd gathers at a press conference and rally in front of Manhattan federal court to vocalize their objection to the stop and frisk policy by the police Department Wednesday, March 27, 2013, in New York. The Center for Constitutional Rights has brought a lawsuit on behalf of four black plaintiffs who claim they were stopped by police because of their race. (AP Photo/ Louis Lanzano) Louis Lanzano/ASSOCIATED PRESS hide caption

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