The physician assistant who treated Zimmerman the day after the shooting, Lindzee Folgate, said he came in wanting a note to go back to work. He was also complaining of nose pain and told her he was involved in an altercation and was pushed to the ground.
"His head was hit into the pavement multiple times," Folgate said.
She measured two lacerations that she observed on the back of Zimmerman's head, which were 2 cm and 0.5 cm in length. She said she didn't feel sutures were necessary.
She also examined Zimmerman's nose, finding swelling and bruising. Based on her observations, she believed it was broken but couldn't say for sure without an x-ray. She said she encouraged Zimmerman to see a specialist.
Prosecutor Bernie de la Rionda had Folgate review medical records from her past visits with Zimmerman, the first of which was dated Aug. 19, 2011. Zimmerman told her he was having trouble sleeping and had "started to exercise intensely with MMA but this has not helped."
In another visit dated Sept. 23, 2011, Zimmermann told Folgate he was "involved in mixed martial arts three days per week."
Folgate didn't note any swelling on Zimmerman's head the day after he shot Martin, but she did review police photos from that night with defense attorney O'Mara.
She agreed that what appeared to be bumps, swelling and abrasions could be consistent with a head being hit against concrete. But she also said some bumps just occur naturally on the head, depending on the shape.
In his final questions for Folgate, O'Mara asked her whether Zimmerman's life may have been in danger.
"Medically speaking, would you agree that whatever he did to stop the attack allowed him to survive it?" asked O'Mara.
"It could have, potentially, yeah. It depends on the amount of trauma he was sustaining at the time," said Folgate.
"So, stopping the attack is what allowed him to survive it, would you agree?" asked O'Mara.
"It could have, yes," said Folgate.
Prosecutor de la Rionda followed up by asking Folgate if she was speculating. She admitted that she wasn't there that night.
Testimony in the trial is set to resume on Monday at 9 a.m. ET.