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NEW YORK, NY - MARCH 28: People along with New York City Council members attend a press conference to call for justice in the February 26 killing of 17-year-old Trayvon Martin in Sanford, Florida, on the steps of City Hall March 28, 2012 in New York City. Martin was killed by George Michael Zimmerman while on neighborhood watch patrol in the gated community of The Retreat at Twin Lakes. (Photo by Allison Joyce/Getty Images)

NEW YORK, NY - MARCH 28:  People along with New York City Council members attend a press conference to call for justice in the February 26 killing of 17-year-old Trayvon Martin in Sanford, Florida, on the steps of City Hall March 28, 2012 in New York City. Martin was killed by George Michael Zimmerman while on neighborhood watch patrol in the gated community of The Retreat at Twin Lakes.  (Photo by Allison Joyce/Getty Images)