He was tended at the scene by paramedics, but he told them that he did not need to go to a hospital, police reported.
The video shows a somber Zimmerman, hands cuffed behind his back, stepping from a patrol car, surrounded by several officers, walking through a door, then returning.
Meanwhile, McClatchy Newspapers reported that despite public claims that there wasn't enough probable cause to make a criminal case in the killing, early in the investigation Sanford police requested an arrest warrant from the Seminole County State Attorney's Office.
A Sanford Police incident report shows that the case was categorized as "homicide/negligent manslaughter."
The State Attorney's Office held off pending further review, McClatchy Newspapers has learned.
Zimmerman, 28, an insurance underwriter and college student, was never charged, triggering a nationwide crusade on Martin's behalf.
The report of an arrest-warrant request contradicts statements repeatedly made by Sanford Police Chief Bill Lee, who has since stepped aside and was lambasted for his handling of the case. Lee publicly insisted that there was no probable cause to arrest Zimmerman, leading many critics to say that he came across more like a defense attorney for Zimmerman.
"Zimmerman provided a statement claiming he acted in self-defense, which at the time was supported by physical evidence and testimony," Lee wrote in a memo posted on the city's website.
"By Florida Statute, law enforcement was prohibited from making an arrest based of the facts and circumstances they had at the time," Lee wrote.
He cited the statute number for Florida's "Stand Your Ground" law, which provides immunity to people who kill someone in self-defense.