Trayvon Martin's girlfriend, talking to him on the telephone, heard the teenager saying "get off, get off," in the moments before his cell phone cut off and he was shot dead, according to a recording released Friday of the girl's interview with a prosecutor.
Another witness, however, seems to put Martin on top of George Zimmerman for at least part of the struggle, according to another recording.
"When I first walked out there, the black guy was on top, and the only reason I can tell that was because the guy that was on the ground under him at that point wrestling was definitely a lighter color," the man, whose name has not been made public, said in the interview.
Martin was African-American. Zimmerman is Hispanic.
When first interviewed, the witness said the individual on the bottom was calling for help. But a few weeks later, in another interview, he said he wasn't sure.
"At first I thought it was the person on the ground, because me thinking rationally, if someone was on top, the person on the bottom would be yelling," the witness aid. "I truly can't tell who, after thinking about it, was yelling for help just because it is so dark on that sidewalk. You can't see a mouth."
In his second interview, the witness said when he returned to the window while calling 911, he saw the person who had been on top sprawled in the grass, not moving. Another person with his hands in the air said, "The gun's on the ground. I shot this guy in self-defense," according to the witness.
Another witness said the heavier of the two individuals appeared to be on top.
"I know after seeing the TV of what's happening, comparing their pictures, I think Zimmerman was definitely on top because of his size," the witness said.
The recordings provide the most detailed look yet into previously reported witness statements detailing the last moments of Martin's life.
Martin, 17, was shot to death February 26 while walking in the Sanford, Florida, neighborhood where he was staying during a visit with his father.
The girlfriend, whose name has not been made public, told Assistant State Attorney Bernie de la Rionda that Martin got away from the man, who turned out to be Zimmerman, but only temporarily.
He was out of breath from running away and scared, she said, and decided not to keep running because he was close to the house where he was staying.
And as Zimmerman drew closer, the girl said, Martin called out, "Why you following me for?" according to the recording.
"I hear this man, like this old man, say, 'What are you doing around here?' " the girl said.
The girl said she called out to Martin, asking what was happening, but he didn't answer. The next thing she heard was a bumping sound, followed by what might have been a scuffle.
"I could hear it a little bit, 'Get off, get off,' then the phone just hung up," the girl said.
Zimmerman, a neighborhood watch volunteer, is charged with second-degree murder in the death, which sparked nationwide protests and inflamed public passions over race relations and gun control.
Another witness interviewed by police said Zimmerman "looked like he had just gotten his butt whupped," according to a recording released by authorities. The witness also said Zimmerman seemed nonchalant about the shooting, "like it was nothing." Zimmerman told the witness to call his wife and "just tell her I shot somebody."
A woman told Sanford officers she did not hear the sounds of fighting outside her residence. "I heard nothing but a little kid scared to death, like crying."
Zimmerman has claimed self-defense in the shooting, saying Martin charged him after the two exchanged words, knocking him to the ground and hitting his head repeatedly against a concrete sidewalk.
Prosecutors say Zimmerman profiled Martin as a criminal and killed him, even though he was doing nothing wrong.
Zimmerman has pleaded not guilty.
The recordings and other documents released as part of the court case also touch on the racial component of the case.
In one recording, a former co-worker of Zimmerman's says Zimmerman made him the butt of a long-running office joke, ridiculing his Middle Eastern accent and bullying him in what the witness described as a juvenile but infuriating effort to fit in with other workers. In another, an anonymous caller tells a Sanford police officer that Zimmerman and his family are racists.