Trayvon Martin supporters rally in Times Square while blocking traffic after marching from a rally for Martin in Union Square in Manhattan, July 14, 2013 in New York City. George Zimmerman was acquitted of all charges in the shooting death of Martin July 13 and many protesters questioned the verdict.

Demonstrators angry at the acquittal of George Zimmerman in the death of Trayvon Martin protest on the 10 Freeway stopping traffic in Los Angeles, July 14, 2013. Thousands protested in US cities overnight as President Barack Obama appealed for calm following the acquittal in Florida of a man who gunned down an unarmed black teenager.

Demonstrators hold signs in front of the Freedom Tower in downtown Miami a day after the verdict to the George Zimmerman murder trail, July 14, 2013 in Miami. A jury found neighborhood watch volunteer, George Zimmerman not guilty of shooting and killing 17-year-old Trayvon Martin after an altercation, Feb. 2012.

People hold hands in a circle at a rally honoring Trayvon Martin at Union Square in Manhattan, July 14, 2013 in New York City. George Zimmerman was acquitted of all charges in the shooting death of Martin July 13 and many protesters questioned the verdict.

People gather at a rally honoring Trayvon Martin at Union Square in Manhattan, July 14, 2013 in New York City. George Zimmerman was acquitted of all charges in the shooting death of Martin July 13 and many protesters questioned the verdict.

A man makes a chalk drawing on the ground during a demonstration in New York City's Union Square Park, July 14, 2013. Protests were held one day after a jury found George Zimmerman not guilty of murdering unarmed black teen Trayvon Martin on Feb. 26, 2012, in a racially charged trial that transfixed the country.

Sam Hill, 11, wipes away tears during a youth service at the St. Paul Missionary Baptist Church in Sanford, Fla., Sunday, July 14, 2013.

People react after hearing the news that George Zimmerman was found not guilty in the 2012 shooting death of Trayvon Martin, in New York July 13, 2013.

Jackie Vanderbilt (2nd L) and Pat Logan attend a rally following the George Zimmerman verdict in the Leimert Park area of Los Angeles, Calif., July 13, 2013.

Darrsie Jackson, center, reacts after hearing the verdict of not guilty in the trial of George Zimmerman with her children Linzey Stafford, left, 10, and Shauntina Stafford, 11, at the Seminole County Courthouse, July 13, 2013, in Sanford, Fla.

Demonstrators outside the Seminole County Courthouse react after hearing the verdict of not guilty in the trial of George Zimmerman, Saturday, July 13, 2013, in Sanford, Fla. Zimmerman had been charged with the 2012 shooting death of Trayvon Martin.

Demonstrators react to the verdict outside Seminole County Court where George Zimmerman was found not guilty on second-degree murder and manslaughter charges in Sanford, Fla., July 13, 2013.

Demonstrators react after hearing the verdict of not guilty in the trial of George Zimmerman at the Seminole County Courthouse, July 13, 2013, in Sanford, Fla.

People react to the verdict at Seminole County Court where George Zimmerman was found not guilty on second-degree murder and manslaughter charges in Sanford, Fla., July 13, 2013.

A mother holds and sits with her children after hearing the verdict of not guilty in the trial of George Zimmerman at the Seminole County Courthouse, July 13, 2013, in Sanford, Fla.

A demonstrator places a sign outside Seminole County Court where George Zimmerman's second-degree murder trial is being deliberated by jurors in Sanford, Fla., July 13, 2013.

Demonstrators hold signs outside Seminole County Court where George Zimmerman's second-degree murder trial is being deliberated by jurors in Sanford, Florida, July 13, 2013.

Cynthia Bradford, right, of Casselberry, Fla., shows her support for Trayvon Martin as a George Zimmerman supporter holds up a sign in the background outside the Seminole County Courthouse in Sanford, Fla., Saturday, July 13, 2013.

Eli Shell (R) of Los Angeles, CA and a man who identified him self as Chris demonstrate outside Seminole County Court where George Zimmerman's second-degree murder trial is being deliberated by jurors in Sanford, Fla., July 13, 2013.

Ed Wilson, of Longwood, Fla., shows his support for George Zimmerman outside the Seminole County Courthouse in Sanford, Fla., Saturday, July 13, 2013.

A man who identified himself as Ike wears a shirt portraying George Zimmerman in cross-hairs across the street from the Trayvon Martin memorial in the historically black Goldsboro neighborhood of Sanford, Fla., Friday, July 12, 2013.