The Orlando Sentinel reports that Tom Owen, forensic consultant, court-qualified expert witness and chair emeritus for the American Board of Recorded Evidence, analyzed the 9-1-1 recording of the night Trayvon Martin was shot and killed by George Zimmerman.
His conclusion: “you can say with reasonable scientific certainty that [the person calling for help is] not Zimmerman.”
The technology Owen used to analyze the Zimmerman tape has a wide range of applications, including national security and international policing, he said. A recently as January, Owen used the same technology to identify accused murderer Sheila Davalloo in a 911 call made almost a decade ago.
[…]
Owen says the audio from Zimmerman’s call is much better quality than the 911 call in the Davalloo case. Voice identification experts judge the quality based on a signal-to-noise ratio; in other words, comparing the usable audio in a clip to the environmental noises that make a match difficult.
Although Owen said that he could not identify the voice calling for help, Ed Primeau, a Michigan-based analyst, told the Orlando Sentinel:
“I believe that’s Trayvon Martin in the background, without a doubt,” Primeau says, stressing that the tone of the voice is a giveaway. “That’s a young man screaming.”
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