george zimmerman*Now that the court of public opinion’s case against Trayvon Martin’s killer has begun, George Zimmerman’s claim that he was the one screaming on the 911 call, is being scrutinized. A leading expert in forensic voice identification verified that it wasn’t the killer screaming for help, reports the Orlando Sentinel.

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Tom Owen, forensic consultant for Owen Forensic Services LLC and chair emeritus for the American Board of Recorded Evidence, used voice identification software to rule out Zimmerman. Another expert contacted by the Sentinel, utilizing different techniques, came to the same conclusion.

The night of Martin’s death a woman made an emergency call and in the background is screaming for help. Then after a single gunshot, the screaming ceased.

Owen, a court-qualified expert witness and former chief engineer for the New York Public Library‘s Rodgers and Hammerstein Archives of Recorded Sound, is an authority on biometric voice analysis — a computerized process comparing attributes of voices to determine whether they match.

After the Sentinel contacted Owen, he used software called Easy Voice Biometrics to compare Zimmerman’s voice to the 911 call screams.

“I took all of the screams and put those together, and cut out everything else,” Owen says.

The software compared that audio to Zimmerman’s voice. It returned a 48 percent match. Owen said to reach a positive match with audio of this quality, he’d expect higher than 90 percent.

“As a result of that, you can say with reasonable scientific certainty that it’s not Zimmerman,” Owen says, stressing that he cannot confirm the voice as Trayvon’s, because he didn’t have a sample of the teen’s voice to compare.

Read/learn more, including what the other expert had to say, at the Orlando Sentinel.