Zimmerman had called 911 to complain about a suspicious person in the neighborhood, according to authorities.
In the call, Zimmerman said he was following Martin after the teen started to run, prompting the dispatcher to tell him, “We don’t need you to do that.” Zimmerman pursued Martin anyway.
After briefly losing track of the teen, Zimmerman told authorities the teen approached him and the two exchanged words. Zimmerman said he reached for his cell phone, then Martin punched him in the nose. Zimmerman said Martin pinned him down and began slamming his head onto the sidewalk, leading to the shooting.
Police have said Zimmerman was not immediately charged because there was no evidence to disprove his account that he had acted in self-defense. A police report indicated he was bleeding from the nose and the back of his head.