Miami is one of 100 cities hosting a rally for "National Justice for Trayvon Day" on Saturday.
The rally is being held on the plaza of the Wilkie D.Ferguson,Jr. United States Courthouse, 400 North Miami Avenue beginning at 10:00 a.m.
The Rev. Al Sharpton's National Action Network said the goal of the "100 City Campaign" is to urge the Justice Department to consider a federal civil rights prosecution in the death of Trayvon Martin.
George Zimmerman, a Hispanic man, shot the African-American teenager on February 26, 2012. He claimed self-defense, and a Florida jury acquitted him July 13.
Zimmerman had a confrontation with Martin after calling police to report a suspicious person. The case became a flashpoint in debates over racial profiling.
Saturday's rallies will be headlined by Martin's mother, Sybrina Fulton, her surviving son, Jahvaris Fulton, and Sharpton in New York. Martin's father, Tracy Martin, will appear at a rally in Miami.