"Looking at all the evidence, no one denies that Mr. Zimmerman was stalking Trayvon Martin," Shelton said. "Everyone says he began following him."

Zimmerman's brother, Robert Zimmerman Jr., told CNN Sunday that the FBI investigation didn't find "any inkling of racism." In an interview with NPR that day, he said his family has been flooded with graphic threats, and he took issue with the description of Martin as unarmed.

"Trayvon Martin was armed," Robert Zimmerman told NPR. "He used the sidewalk against my brother's head."

Much of the reaction to the case touched on America's troubled history with race and the justice system. Some at the Inner Harbor rally held signs comparing Martin to Emmett Till, a 14-year-old brutally killed in Mississippi in 1955 in another racially charged case.

At Empowerment Temple Sunday morning, Bryant tapped into those feelings of unequal justice. He spoke about slavery and lynchings and fear, acknowledging the anger about the verdict and saying he woke Sunday with a "bitter taste" in his mouth, too.

But even as he vowed to go to the Justice Department about the case, he encouraged people to bring "that same anger" to the ongoing spate of killings in Baltimore and funnel it into efforts to make the city safer. His church is planning a gun buyback event in August.

"Pray that we will begin to have a restoration of the value of human life," Bryant said.

Baltimore Sun reporter Jacques Kelly contributed to this article.