FBI report that included statements from a homicide investigator who said that Zimmerman was not racist.

"Also when a president speaks, it's to multiple audiences," she added. "If you think of the young mother whose 2-year-old son was shot in the face by the two black teens that approached her in Atlanta and that baby had died, why do presidents choose to speak about one case and not the other? That's why it's better maybe not to talk about any of them."

Earlier this year, a Georgia woman said her 13-month-old son was fatally shot by two African-American teens who approached her and asked for money.

In contrast to the Martin killing, 17-year-old De'Marquise Elkins and 15-year-old Dominique Lang were charged with first-degree murder about a day after the crime. And the 13-month-old victim in the Georgia case was never profiled as criminal and blamed for his own death.