Zimmerman verdict in: not guilty

George Zimmerman is a free man Sunday morning after a jury cleared the neighborhood watch volunteer of all charges in the fatal shooting of Trayvon Martin.

A Florida jury found Zimmerman not guilty of second-degree murder Saturday night and declined to convict him on a lesser charge of manslaughter.

Despite the acquittal, his brother tells CNN that Zimmerman is going to be "looking over his shoulder the rest of his life" given the national attention the case has attracted. The death of the unarmed 17-year-old unleashed protests and debate across the U.S. over racial profiling, self-defense and equal justice.

Robert Zimmerman Jr., says his brother is still processing the reality that he won't serve prison time for the killing, which Zimmerman has maintained was an act of self-defense.

Defense attorney Mark O'Mara suggests Zimmerman's safety would be an ongoing concern. He says a fringe element of society still wants revenge for Martin's killing.