Missourian
Diamond Member
You don't know that....stop lying
I don't lie. The witness testimony:
But one man's testimony could be key for the police.
"The guy on the bottom who had a red sweater on was yelling to me: 'help, help and I told him to stop and I was calling 911," he said.
Trayvon Martin was in a hoodie; Zimmerman was in red.
The witness only wanted to be identified as "John," and didn't not want to be shown on camera.
His statements to police were instrumental, because police backed up Zimmerman's claims, saying those screams on the 911 call are those of Zimmerman.
And "John" is apparently lying. At least according to the first voice analysis.
According to the Sentinel, Owen used software "to compare Zimmerman's voice [heard on another 911 call, which Zimmerman made earlier the evening of Feb. 26] to the 911 call screams" recorded during a neighbor's phone call to police. The software, the Sentinel says, "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."
It wasn't possible for Owen to determine if the voice was that of Martin, the newspaper adds, because he didn't have a recording of the teen's voice to compare to the shouts for help.
The Sentinel writes that Ed Primeau, another audio forensics expert, used enhancement technology and "human analysis" to conclude that it was "a young man screaming."
Trayvon Martin Case: Voice Calling For Help Isn't Zimmerman's, Experts Say : The Two-Way : NPR
Except the "experts" emphasize that...
The experts, both of whom said they have testified in cases involving audio analysis, stressed they cannot say who was screaming.
Such analysis could play a role should there be a criminal or civil case over Martin's death.
Primeau, who said he uses a combination of critical listening skills and spectrum analysis, called voice identification "an exact science" that can help a legal team in court.
And standards set by the American Board of Recorded Evidence indicate "there must be at least 10 comparable words between two voice samples to reach a minimal decision criteria."
While Zimmerman says more than that many words on his 911 call, the only one heard on the second is a cry for "help."
But that board's current chairman Gregg Stutchman -- who described Owens as a friend and well-respected in their field -- said that exact metric doesn't necessarily apply to the software Owens used.
David Faigman, a professor of law at the University of California-Hastings and an expert on the admissibility of scientific evidence, said courts and the overall scientific community have mixed opinions about the reliability of such "voiceprint" analysis.
Such analysis could play a role should there be a criminal or civil case over Martin's death.
Primeau, who said he uses a combination of critical listening skills and spectrum analysis, called voice identification "an exact science" that can help a legal team in court.
And standards set by the American Board of Recorded Evidence indicate "there must be at least 10 comparable words between two voice samples to reach a minimal decision criteria."
While Zimmerman says more than that many words on his 911 call, the only one heard on the second is a cry for "help."
But that board's current chairman Gregg Stutchman -- who described Owens as a friend and well-respected in their field -- said that exact metric doesn't necessarily apply to the software Owens used.
David Faigman, a professor of law at the University of California-Hastings and an expert on the admissibility of scientific evidence, said courts and the overall scientific community have mixed opinions about the reliability of such "voiceprint" analysis.