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Forensic Experts Say Screams Were Not Zimmerman's

Hugh Pickens writes "As the Trayvon Martin controversy splinters into a debate about self-defense, a central question remains: Who was heard crying for help on a 911 call in the moments before the teen was shot? Now the Orlando Sentinel reports that Tom Owen, a leading expert in the field of forensic voice identification sought to answer that question by analyzing the recordings. His result: It was not George Zimmerman who called for help. 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. Owen 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,' says Owen. The software compared that audio to Zimmerman's voice and returned a 48 percent match. Owen says to reach a positive match with audio of this quality, he'd expect higher than 90 percent. Owen cannot confirm the voice as Trayvon's, because he didn't have a sample of the teen's voice to compare however 'you can say with reasonable scientific certainty that it's not Zimmerman.'"

23 of 1,046 comments (clear)

  1. Re:April Fools by ohnocitizen · · Score: 5, Insightful

    Really? Slashdot has frequent coverage of human rights, crime, law enforcement. Technology alone isn't the only subject Slashdot readers are interested in. It just so happens that technology and forensics do play a role in this story. However even if they didn't, this is a huge story, and well worth covering on Slashdot.

  2. Does This Tool Actually Work? by Stormy+Dragon · · Score: 5, Insightful

    While I'm personally of the opinion that Zimmerman is guilty of manslaughter, I've also seen too many cases of "forensic science" of dubious validity being allowed in trials (for example Steven Hayne in Mississippi help convict dozens of people on the base of 'bite mark identification' techniques that are widely considered fraudulent). Can anyone point to any independent blind trials to demonstrate 1) that the metrics used by this program actually are invariant for a particular individual and 2) are sufficiently unique that they can be used to reliably distinguish two individuals?

    1. Re:Does This Tool Actually Work? by gstrickler · · Score: 5, Insightful

      Yes, but there are so many holes in his story that it's beyond belief. There is no question of who shot Trayvon, Zimmerman has admitted that. He's claiming self-defense, and his story doesn't hold up to any scrutiny. He should be (should have already been) arrested and charged, and let the legal system handle it, not the media and public outcry. If they don't have enough evidence, then the grand jury can refuse to indict. If they do, then he goes to trial or makes a plea.

      --
      make imaginary.friends COUNT=100 VISIBLE=false
    2. Re:Does This Tool Actually Work? by sjames · · Score: 5, Insightful

      That's exactly it. We know for a fact that he began from a position of safety (since he was on the phone w/ 911). Stand your ground does not mean charge into danger. We know the victim had no weapon. That makes the threat to life or grievous bodily harm seem unlikely. It really does seem like more than enough to justify deeper investigation, but instead the DA has already delivered a poor excuse for no charges which generally indicates there will be none..

    3. Re:Does This Tool Actually Work? by gstrickler · · Score: 5, Insightful

      Exactly. Zimmerman followed Trayvon despite being told not to, got out of his car, armed with a gun and started a confrontation, then shot Trayvon, that's not self-defense, and it's not covered under Florida's "Stand your ground" statute as far as I can tell. It needs to be put before a jury to determine if he's guilty, so he definitely needs to be arrested and charged and let the legal system work it out.

      --
      make imaginary.friends COUNT=100 VISIBLE=false
  3. Re:So what? by Tenebrousedge · · Score: 5, Insightful

    I'm more concerned that someone under the presumption of innocence is instead being tried in the court of public opinion, which obeys no law and follows no procedure. Regardless of the facts of the matter, I would almost rather have my day in court and be acquitted than have my life torn to pieces in a three-ring media circus.

    --
    Those who advocate genocide deserve every protection afforded by law, and none afforded by common human decency.
  4. Re:Slashdot by busyqth · · Score: 5, Insightful

    all the actual techies have left and been replaced with libertarian trolls.

    Huh? I remember way back when quoting Ayn Rand on Slashdot was a sure ticket to +5 Insightful. And you say that Slashdot is infested with libertarian trolls now?

  5. Re:In case you missed it by busyqth · · Score: 5, Insightful

    Hmm... "my fox tampa bay" and "bob owens"... two totally trustworthy news sites there. good job.

  6. Re:So what? by Anonymous Coward · · Score: 5, Insightful

    If only the guy who shot another person without witnesses would have been actually *investigated*, instead of letting him walk entirely on his own testimony...

  7. Re:So what? by Cwix · · Score: 5, Insightful

    I agree, he shouldn't be facing the court of public opinion. He should be facing the court of law. It certainly doesn't look like that is happening.

    --
    You are entitled to your own opinions, not your own facts.
  8. It's not a question of innocence by meosborne · · Score: 5, Insightful

    It's not a question of guilt or innocence, Zimmerman is guilty of shooting and killing Trayvon Martin. That is not in question at all. The question is whether he was legally justified in doing so. Unfortunately, one side of the story (Trayvon) has been removed and cannot be heard.

    A human being *died*. A young man was shot and killed while bearing only a can of iced tea and a bag of skittles. An investigation of more than simply accepting the word of the shooter is definitely warranted.

  9. yawn: "trial by rumor" by peter303 · · Score: 5, Insightful

    "Trial by social media". "Trial by the self-righteous" Glad we have court systems to sort out all these rumors.

    1. Re:yawn: "trial by rumor" by BasilBrush · · Score: 5, Insightful

      If only the court system was being used.

  10. Re:So what? by Troyusrex · · Score: 5, Insightful

    There aren't "well established facts" in this case. At least not that are known to the general public. Cases tried in the media tend to be enormously biased because they are about generating interest not about reliable evidence. For instance, was Zimmerman's nose broken and the back of his head injured or not? We don't know but such evidence would obviously make a big difference in the case.

  11. Re:In case you missed it by TheRealGrogan · · Score: 5, Insightful

    It doesn't even matter if he was beaten... he should be.. We don't have to recognize the authority of Neighbourhood Watch snitches. If they think there is an issue, they are to call the police. That's it. If they engage, WE have the right to self defense. They don't have police powers and if they attempt to bar my egress I won't hesitate to use as much force as necessary.

  12. Re:So what? by Mistlefoot · · Score: 5, Insightful

    I agree.

    Is it self defence if I am breaking into someone's else home, they grab a knife and "attack" me and I shoot them as I fear for my life?
    Clearly no. The homeowner has the right to defend themselves from the instigator.

    Is it self defence if I stalk someone walking down the road and they "attack" me and I shoot them as I fear for my life?
    Or let's ask it backwards.
    If I am walking down the street minding my own business and I am followed and stalked by another are they allowed to kill me when I defend myself?
    EVEN if Zimmerman found himself defending himself he should still be investigated as evidence indicates that he is defending himself from an event he initiated.

    Trayvon, per mobile conversation with his girlfriend:

    ""He says: 'Oh, he's right behind me. He's right behind me again,'" Crump said the girl told him. "She says: 'Run.' He says: 'I'm not going to run, I'm just going to walk fast.'

    She then heard Martin saying "Why are you following me""

    Florida stalking law arguably shows that Trayvon was being stalked. Easily as arguable as the "stand your ground" arguement. And that would mean that he was killed by someone in the commision of a crime.

    "FLORIDA

    Section 784.048. STALKING; DEFINITIONS; PENALTIES. 1997.

    (1) As used in this section, the term:

    (a) "Harass" means to engage in a course of conduct directed at a specific person that causes substantial emotional distress in such person and serves no legitimate purpose.

    (b) "Course of conduct" means a pattern a conduct composed of series of acts over a period of time, however short, evidencing a continuity of purpose. Constitutionally protected activity is not included within the meaning of "course of conduct." Such constitutionally protected activity includes picketing or other organized protests.

    (c) "Credible threat" means a threat made with the intent to cause the person who is the target of the threat to reasonably fear for his or her safety. The threat must be against the life of, or a threat to cause bodily injury to, a person."

  13. Re:So what? by misexistentialist · · Score: 5, Insightful

    None of those three items are laws, the breaking of which would be chargeable offenses. Carrying the gun was legal, as was observing someone in public (or a private neighborhood which Zimmerman was responsible for securing). If Martin attacked him, he was the first and only person who broke a law.

  14. Re:So what? by mikelieman · · Score: 5, Insightful

    Not really. There's 2 essential elements to charging manslaughter in Florida, and Zimmerman meets them.

    They are, (1) Trayvon Martin is dead and (2) George Zimmerman killed him.

    I don't give a shit about anything else. Zimmerman can tell his story to a Judge, and if the Judge buys his motion to dismiss, then so be it.

    --
    Technology -- No Place For Wimps! Grateful Dead and Jerry Garcia Chatroom -- http://www.wemissjerry.org
  15. Re:In case you missed it by Mitreya · · Score: 5, Insightful

    While it would be interesting to hear what the EMTs saw, if they say he appeared to have been beaten you won't believe them.

    I would totally believe the EMTs if they testified to that under oath in court. Of course I wouldn't really believe Zimmerman's claims, since he obviously has a bit of a bias
    Problem is, he's not had to defend himself in court, to bring all that exonerating evidence. Police just took his word for it.

  16. Re:So what? by SockPuppetOfTheWeek · · Score: 5, Insightful

    You know what? I'm not playing this game.

    There is no such thing as "injuries severe enough to justify lethal force". If someone has reasonable cause to fear for their safety, if you injure them at all, they are justified in using any and all available force to stop you from injuring them further. Period.

    Don't like it? Don't start fights you can't win. And since concealed carry is legal (and Zimmerman had a CCW permit, by the way), you have no way of knowing whether someone has a concealed weapon. So, the moral of the story: don't start fights.

  17. Re:In case you missed it by frank249 · · Score: 5, Insightful

    If the EMTs treated Zimmerman, then they would have put a dressing over any break in the skin to prevent infection. The back of his head does not even have a band aid on it. If he had a broken nose there would have been blood on his shirt and jacket and you would likely see nose plugs to stop the bleeding. There also would have been swelling. No evidence of this either.

    --

    Today's vices may be tomorrow's virtues.

  18. Re:What difference does it make? by jamesh · · Score: 5, Insightful

    A 911 dispatcher is NOT a cop and has NO authority. Being told to leave the kid alone by the 911 operator means nothing in any legal sense.

    Nobody is saying the 911 dispatcher has any legal authority. It was advice. Good advice. If he had followed that advice and stayed where he was we mightn't be in this mess now. At the very least there wouldn't be the public opinion that he put himself in a position where using his gun might be considered even remotely necessary.

    Just because "you're not the boss of me" doesn't mean you shouldn't listen to the person offering the advice.

  19. Re:In case you missed it by realityimpaired · · Score: 5, Insightful

    I wasn't there, so I have no real opinion on the whole thing other than to say, "I do hope they figure out what really happened so we can put it all to rest." There are important, unanswered questions about what happened and both theories seem entirely plausible to me.

    The 911 calls clearly show that Zimmerman pursued Martin after having been told not to, and Martin was found to have had no weapons of any kind on his person. Neither of those facts have been disputed by any version of events that I've heard. Where's the doubt and unanswered questions for you?

    Quite honestly, it doesn't matter if Martin beat the crap out of Zimmerman before he was shot. Zimmerman was an armed man following him as he was trying to go about his daily business. In the same situation, I would have done the same. *that* is the self defense in this situation. If there was an altercation before Martin was shot, it was because Martin was trying to defend himself against Zimmerman. It's not relevant to the fact that Zimmerman followed him after having been told not to, and that as a direct result of that, Martin was killed. Whether it's manslaughter or premeditated may be in question, but there should be no doubt at all that Martin was murdered.

    While I don't like turning this into a racial thing, the unfortunate reality is that if Martin was a 17-year old white girl, there wouldn't be any doubt whether Zimmerman was a murderer. Unfortunately, his victim was a 17-year old black boy. That, alone, is enough in the minds of some people to cast doubt on whether it was murder or self defense, and it makes me sick to my stomach. That kid did not have to die, and he is being denied justice by a police force that refuses to arrest and charge his killer.

    Unfortunately, the racial tensions that are coming out of the woodwork over this one are exactly the reason that Martin was killed in the first place: in the US, the schism between Blacks and Whites was never resolved. It was put on the back burner and allowed to fester while on the surface people pretended it was done with. As long as there continues to exist a double standard, it can never be resolved properly.

    The US is not alone in this... there's similar problems in other countries... look at how France is treating the Muslims (well, the US is doing it, too). Look at how "witches" are being treated in Africa and India. Look at how the first nations population is grossly over-represented in Canadian prisons. The world has a lot of problems. My only hope (aside from justice for Martin) is that it will open a dialogue and people will realise that the colour of your skin is not an indicator of what you will do with your life. Sadly, I think that realisation is generations away in parts of the US. (and yes, it took generations in other parts of the world, but we had a head start... in the British Empire, for example, slavery was officially abolished in 1833, but was largely gone already by 1797 and had been ruled in 1772 that Slavery was not legal in England itself, only the colonies... the beginnings of desegregation in England go back to a 1569 report, which declared that "England [was] too pure an air for a slave to breathe in". So we've had a bit of a head start.)