George Zimmerman, defendant in the killing of Trayvon Martin, arrives with his attorney Mark O'Mara, right.

Trayvon Martin’s father Tracy Martin and mother Sybrina Fulton on March 25 in Sanford, Fla.

A memorial in honor of Trayvon Martin is seen outside of The Retreat at Twin Lakes gated community where Martin was fatally shot on February 26th by George Zimmerman while on neighborhood watch patrol in Sanford, Florida.

Trayvon Martin, in an undated photo released by his family

17-year-old Trayvon Martin was shot and killed as he walked through a gated neighborhood, where he was visiting family in Sanford, Florida on February 26, 2012.

Protesters demonstrate at a rally for slain teenager Trayvon Martin on March 22, 2012 in Sanford, Florida.

Tracy Martin, left, and Sybrina Fulton, parents of shooting victim Trayvon Martin speak out, Friday, March 16, 2012, during a news conference in Orlando, Florida.

Mother Sybrina Fulton and Father Tracy Martin, the parents of slain Florida teen Trayvon Martin, speak to TIME in Sanford, Florida on March 25, 2012.

In this Feb. 27, 2012 image taken from a Sanford Police video posted on a website called gzlegalcase.com by George Zimmerman's defense team, Zimmerman speaks to an unidentified investigator at the scene of Trayvon Martin's fatal shooting.

Signs, balloons, packages of Skittles and cans of iced tea are piled into a memorial dedicated to Trayvon Martin near the site where he was killed in front of The Retreat at Twin Lakes community in Sanford, Florida, March 27, 2012.