Zimmerman judge bans audio experts

Testimony on 911 calls not allowed

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

The screams are crucial pieces of evidence because they could determine who the aggressor was in the confrontation before Zimmerman fatally shot the unarmed teenager. Martin’s family contends it was the teen screaming, while Zimmerman’s father has said it was his son.

Judge Debra Nelson ruled that the methods used by the experts aren’t reliable. But her ruling doesn’t prevent the 911 calls from being played at trial.

She reached the deci- sion after hearing arguments on whether to allow testimony from two prosecution experts. One expert ruled out Zimmerman as the screamer and another said it was Martin. Defense experts 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 black teenager in self-defense last year. Zimmerman is pleading not guilty.

Audio experts from both sides testified during the hearing. 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 experts Tom Owen and Alan Reich, Nelson had to determine whether it is too nov- el or whether it has been accepted by the scientific community at-large.

“There is no evidence to establish that their scientific techniques have been tested and found reliable,” the judge said.

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. “That’s what tells me the screams aren’t George Zimmerman.”

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.”

Reich testified in a report for prosecutors that the screams on the 911 tapes were from Martin.

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 difficult to analyze voices by comparing screaming to a normal voice.