The photographer said that after the shooting, Zimmerman asked the photographer to call his wife. When the photographer asked him what to say, Zimmerman blurted out, "Man, just tell her I shot someone."
Investigators have seen the photo.
Crump, the Martin family attorney, is skeptical.
"How bad could it have been if they didn't take him to the hospital [and] didn't stitch him up," he said in a statement to ABC News in response to the image. "The special prosecutor has seen all the evidence and still believes George Zimmerman murdered Trayvon Martin."
Testifying today, Zimmerman's father, Robert, a former magistrate, told the court that the day after Martin was killed he saw injuries his son suffered.
"His face was swollen quite a bit," Robert Zimmerman said. "There was a protective cover over his nose, his lip was cut and there were two vertical gashes on the back of his head."
Zimmerman's parents and wife Shellie testified at the hearing by phone because they did not want to make a public appearance out of fear for their safety.
In a dramatic moment during the hearing, a detective, under questioning from O'Mara, admitted that it has no clear evidence that Zimmerman attacked Trayvon Martin first.
Zimmerman's family testified that he should be granted bail because, they said, he is not a violent person.
"He's absolutely not a violent person or a threat to the community," said Shellie Zimmerman, who is a nursing student.
In 2005, Zimmerman was arrested in Orange County, Fla., and accused of battering a police officer and obstructing justice. He pleaded to a lower charge and was ordered to attend an anger management program.
Both his wife and father testified that Zimmerman had seen two men in civilian clothes shoving his friend against a wall and that the officers never identified themselves as police. However, a police affidavit claimed that when the officers showed their badges Zimmerman said, "I don't care who you are."
In a second incident, prosecutor Bernie de la rionda said that a woman got an injunction against Zimmerman after he pushed her and slapped her mouth. Shellie Zimmerman testified that her husband was defending himself after the woman attacked him and drew blood. She said that Zimmerman got an injunction against the woman.