With Zimmerman's shirt and jacket pushed up during the struggle and his holstered gun now visible, he thought Martin was reaching for his firearm holstered around his waist. Zimmerman told the officer that he shot Martin and the teen said, "You got me."
In a written statement, Singleton read in court, Zimmerman refers to Martin as "the suspect." Singleton said it didn't appear that Zimmerman showed any anger when talking about the teen. Prosecutors must show that Zimmerman acted with ill will or a depraved mind in order to get a second-degree murder conviction.
Zimmerman also acted surprised when Singleton told him Martin was dead.
"He's dead?!" Singleton recalled Zimmerman saying, before he lowered his head toward the table in the interrogation room.
Earlier Monday, prosecutors called FBI audio expert Hirotaka Nakasone to focus on the issue of who was screaming for help on 911 calls during the confrontation. Jurors were played the 911 calls several times last week.
The recordings are crucial pieces of evidence because they could determine who the aggressor was in the confrontation. Martin's family contends it was the teen screaming, while Zimmerman's father has said it was his son.
Even though he was a pre-trial witness for the defense, prosecutors called Nakasone to set up later testimony from either the teen's mother or father that they believe it was their son yelling for help.
During his pre-trial testimony, Nakasone testified that there wasn't enough clear sound to determine whether Zimmerman or Martin was screaming on the best 911 sample, an assertion he repeated Monday.
The FBI expert said that it's easier for a person with a familiarity of a voice to identify it than someone who has never heard it previously. That is especially true if the recording is of a subject screaming and the person trying to identify the voice has heard the subject under similarly stressful circumstances previously, Nakasone said.
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