(CNN) -- Just hours after fatally shooting 17-year-old Trayvon Martin, George Zimmerman told police investigators the shooting followed a life-and-death struggle in which the teen told him, "You're going to die tonight." Read the written statement from Zimmerman to police about what happened (PDF) The audio of the February 26 interviews, made public late Wednesday, is part of discovery items released by Zimmerman's defense team. The recordings represent the first time Zimmerman is heard giving his account in his own words. Also released were audio and video showing the techniques used by the police department in the investigation: interviews conducted in the days after the shooting, a video of a voice stress test administered to Zimmerman by police and his videotaped re-enactment of the incident for authorities.
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George Zimmerman tells police he was attacked by Trayvon Martin
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He says Martin "jumped out from the bushes" and punched him
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The audio and video interviews shed light on Zimmerman's account of the shooting
As he spoke to the dispatcher, he told police @placeholder circled his vehicle, but he could not hear whether Martin said anything because his windows were up and he was on the phone.
In a written statement @placeholder gave to police, also released late Wednesday, Zimmerman said Martin told him to "shut the f*** up" during the struggle.
And the investigator expresses doubt that @placeholder, who had lived in the neighborhood for three years and described himself as head of the neighborhood watch, did not know the names of the three streets in the subdivision.