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

itoggle caption Florida State Attorney's Office/AFP/Getty Images

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

itoggle caption Gary W. Green/AP

Sybrina Fulton, mother of Trayvon Martin, speaks as Trayvon's father Traci Martin listens. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images