George Zimmerman in court on Thursday. Gary W. Green/pool/Getty Images hide caption

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Trayvon Martin's friend Rachel Jeantel testifies in the murder trial of George Zimmerman. Her testimony sparked discussions of the racial issues involved in the case. Jacob Langston /UPI /Landov hide caption

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George Zimmerman in a Sanford, Fla., courtroom on Monday. Joe Burbank/pool/Getty Images hide caption

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George Zimmerman, the man accused of second-degree murder in the shooting death of Trayvon Martin. Joe Burbank / Orlando Sentinel /MCT /Landov hide caption

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From 'Morning Edition': NPR's Greg Allen previews the George Zimmerman trial

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George Zimmerman, defendant in the killing of Trayvon Martin, at an April 30 court hearing in Sanford, Fla. Joe Burbank/pool/Getty Images hide caption

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Sybrina Fulton, mother of Trayvon Martin. Paul J. Richards /AFP/Getty Images hide caption

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Sybrina Fulton on 'Tell Me More'

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George Zimmerman, who is charged with second-degree murder in the death of Trayvon Martin, at a court hearing last June in Seminole County, Fla. Joe Burbank/Orlando Sentinel/pool/Getty Images hide caption

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Defense attorney Mark O'Mara (left) with his client, George Zimmerman, at an April hearing related to second-degree murder charges in the killing of Trayvon Martin in Sanford, Fla. Pool/Getty Images hide caption

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George Zimmerman

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A handout composite provided by the Seminole County Sheriff's Office, showing George Zimmerman in new mugshot photos. Seminole County (Fla.) Sheriff's Office/Getty Images hide caption

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George Zimmerman during his bond hearing in a Seminole County, Fla., courtroom on April 20. Gary Green/Orlando Sentinel-Pool/Getty Images hide caption

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A photograph of George Zimmerman's head taken after the Feb. 26 shooting death of Trayvon Martin. It shows blood from injuries he Zimmerman says he received during their encounter. Florida State Attorney's Office/AFP/Getty Images hide caption

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NPR's Greg Allen reporting on 'Morning Edition'

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George Zimmerman during a court appearance on April 20. Gary W. Green/AP hide caption

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Cheryl Corley, reporting for the NPR Newscast

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