Mr. Martin’s father, Tracy Martin, addressing dozens of people outside the federal courthouse in Miami, said, “I vowed to Trayvon when he was laying in his casket that I would use every ounce of energy in my body to seek justice for him.
“I will continue to fight for Trayvon until the day I die,” he added. “Not only will I be fighting for Trayvon, I will be fighting for your child as well.” At a rally in New York, over cries of “We’re all Trayvon Martin,” the Rev. Al Sharpton, one of the organizers of the gatherings, told a crowd of hundreds that Mr. Martin’s death should prompt a movement. Mr. Sharpton said that he wanted to ensure an aggressive federal investigation of Mr. Zimmerman and fight against Florida’s broad self-defense laws. “Last Saturday we cried,” he said, “but this Saturday we march.”