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Here's what to expect Monday in the Zimmerman tria...
Here's what to expect Monday in the Zimmerman tria...: George Zimmerman's trial kicks off Monday with opening statements. This is a breakdown of all of the important bits of information surrounding the case.
George Zimmerman, accused in the Trayvon Martin shooting, leaves a Seminole County courtroom at the end of a pre-trial hearing, in Sanford, Fla., Saturday, June 8, 2013. Circuit Judge Debra Nelson halted the hearing Saturday after an audio expert was unable to testify because he was stuck at an airport. She will issue a ruling after testimony is concluded. (AP Photo/Orlando Sentinel, Joe Burbank, Pool) / AP

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SANFORD, Fla. (AP) — The judge in the murder trial of George Zimmerman said Friday that prosecution audio experts who point to Trayvon Martin as screaming on a 911 calls moments before he was killed won't be allowed to testify at trial.

Judge Debra Nelson's written ruling was released Saturday. She had heard argument during a multiday hearing on whether to allow testimony from two prosecution experts. One expert ruled out Zimmerman as the screamer and another said it was Martin. A defense expert argued there was not enough audio to determine who the screams are coming from. Zimmerman's attorneys also argued that the state experts' analysis is flawed.

Opening statements are set for Monday in the second-degree murder trial for the former neighborhood watch volunteer who says he fired on the unarmed black teenager in self-defense last year. Zimmerman is pleading not guilty.

The screams 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.

Audio experts from both sides testified at different times since the admissibility hearing started last month. Voice experts were hired by lawyers and news organizations to analyze the calls, which were made during the confrontation between the two. The experts arrived at mixed conclusions.

In deciding whether to admit the voice-recognition technology used by prosecution audio expert Tom Owen, Nelson had to determine whether it is too novel or whether it has been accepted by the scientific community at-large.

Owen was hired by the Orlando Sentinel last year to compare a voice sample of Zimmerman with screams for help captured on 911 calls made by neighbors. He said Zimmerman's voice doesn't match the screams. He only compared Zimmerman's voice to the 911 calls because he didn't have a voice sample for Martin at the time.

"The screams don't match at all," Owen testified during the hearing. "That's what tells me the screams aren't George Zimmerman."

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Owen also testified that remarks Zimmerman made in a conversation with a police dispatcher aren't a racial slur. He testified Zimmerman said, "These f------ punks."

Expert Alan Reich testified in a report for prosecutors that the screams on the 911 tapes were from Martin and the defense does not want him to testify at trial.

Reich's analysis also picked up words that other experts couldn't find. They include the words, "This shall be" from Zimmerman and "I'm begging you" from Martin.

In contrast, a British audio expert testified for the defense that it would be extremely difficult to analyze voices by comparing screaming to a normal voice.

"I've never come across a case in my 13 years where anybody's tried to compare screaming to a normal voice," said audio expert Peter French.

A second audio expert for the defense, George Doddington, also criticized prosecution experts who said Friday that screams and pleas on a 911 recording likely belonged to Martin.

"It's all ridiculous," Doddington said.

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