Trayvon Martin case: More documents released

ORLANDO, Fla.

According to court documents, police who responded to the scene could not agree on whether Zimmerman had a broken nose. The officers all agreed, however, that Zimmerman had cuts on his head.

The nature of Zimmerman's injuries could be crucial to his claim of self-defense.

According to the documents, one of the first officers to arrive on scene used a plastic bag to try to stop the flow of blood from Martin's chest wound. Another officer described Zimmerman as grunting from pain when he was taken into an interview room at police headquarters.

Zimmerman is charged with second-degree murder in the February shooting of Martin. The 17-year-old was not armed.

The neighborhood watch volunteer was arrested 44 days after the shooting. This delay triggered protests nationwide and the departure of the police chief in Sanford, Fla., where the incident took place.

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