Prosecutors and Trayvon Martin's family say Zimmerman profiled Martin because of the teen's race. Those allegations, and a 44-day delay before police arrested Zimmerman, sparked nationwide protests involving leading national civil rights leaders and spurred emotional debates about gun control, self-defense laws, race, and equal justice under the law.
In Saturday's strong Florida sun, some people at the courthouse wore hoodies, as Martin had when he died. One woman lay in the grass, her arms spread, in a re-creation of Martin's death. Those in the smaller pro-Zimmerman camp held small signs, saying things like "We love you George" and "George got hit you must acquit."
Joseph Uy of Longwood was among an even smaller group: the few who said they had no opinion on whether Zimmerman was guilty. He said he came because he was "just curious."
"I'm neutral," he said, while cradling his three tiny Chihuahuas in his arms.
By mid-afternoon, people rallied in the heat and chanted slogans as a looming thundercloud threatened a downpour.
"Justice for Trayvon," some shouted. Others yelled, "Convict George Zimmerman."
Police and civic leaders have pleaded for calm in Sanford and across the country after the verdict.
"There is no party in this case who wants to see any violence," Seminole County Sheriff Don Eslinger said. "We have an expectation upon this announcement that our community will continue to act peacefully."
In New York on Saturday, the Rev. Al Sharpton said that no matter the verdict, any demonstrations that follow it must be peaceful.
"We do not want to smear Trayvon Martin's name with violence," the civil rights leader said. "He is a victim of violence."
The Rev. Jesse Jackson had a similar message. He tweeted that people should "avoid violence because it only leads to more tragedies."
Benjamin Crump, an attorney for Martin's family, said the parents are emotional but doing as well as expected as they await a verdict.
"(Jurors) staying out longer and considering the evidence and testimony is a good thing for us arriving at a just verdict," Crump said.
On Saturday morning, Martin's mother, Sybrina Fulton, shared on Twitter what she called her favorite Bible verse: "Trust in the LORD with all your heart and lean not on your own understanding; in all your ways submit to him, and he will make your paths straight."