CDZ Using DNA to solve crime

Discussion in 'Clean Debate Zone' started by miketx, Aug 29, 2018.

  1. miketx
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    miketx Diamond Member

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    I see, so you check under the hood and see your DNA. All I'm saying is something you cannot see, and you have to have a laboratory make these comparisons and there is apparently no way to challenge it, how can someone know for sure the testing was done right?
     
  2. Toronado3800
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    Toronado3800 VIP Member

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    Hire a lab to challenge the DNA results. This IS a case where a rich man has an advantage I do not disagree.

    FWIW I think if a crime lab got caught falsifying reports it would be big news with a number of overturned convictions. If a cop is caught lying some other cases of his are looked at again.
     
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  3. Butch_Coolidge
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    Butch_Coolidge Active Member

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    Are you charged with a crime?


    Sent from my iPhone using Tapatalk
     
  4. candycorn
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    candycorn Alis volat propriis

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    It would seem to me that if I were going to commit a crime, I would carry DNA from others with me and contaminate the crime scene then (if apprehended) hire a lab to do a DNA test.
     
  5. Darkwind
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    Darkwind Gold Member

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    ??

    You would carry around others DNA? What, would you spit it out after you had done your dastardly deed?
     
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  6. candycorn
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    candycorn Alis volat propriis

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    Well, no. Like if you were over at my condo and we were drinking some wine or whatever. If I wanted to implicate you in a crime that I was going to commit, I would carefully take the glass and put it into a ziploc bag for example being careful not to put my own prints on it. Then, when I did want to commit the crime, take the bag with the glass with me and place it at the crime scene. Or, if I'm visiting your house, I go into your restroom and pluck some hairs off of your hairbrush or get some out of the tub or whatever and put them into an envelope I have in my pocket or purse. Then when the crime takes place, I put your hair at the scene. Or, lets say I'm really anti-social and I see a guy at a convenience store throw away his can of Sprite or Budweiser into the garbage can. I fish it out and place it at the crime scene. If the cops come and question me, I say, well, I know Darkwind and the victim had some arguments in the past or say that I saw you leaving the scene... The reliance on DNA seems to create a rush to judgment that may not be there without the DNA. On one hand, it's proof positive that you have a connection to the victim or crime scene. On the other, it doesn't speak to what that link was. Your hair being there doesn't mean that you were there in other words.
     
  7. fncceo
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    fncceo Gold Member

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    The way you see something you cannot see is by the signs it leaves behind it. Just as wind can be seen by the movements it causes, DNA sequences leave behind identifying markers that can be seen and identified in the testing process.

    DNA, just like fingerprints, is circumstantial evidence (though widely referred to as Forensic Evidence, forensic merely means 'for the court'). It can prove that a person has been a certain place, or touched a certain item. It can't say specifically when or why or whether that person had any ill intent.

    It can be used to disprove a persons denial of events leading up to a crime.
     
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  8. Toronado3800
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    Toronado3800 VIP Member

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    Sure. And If I wanted to plant a glass with your fingerprints on it I could do something similar.

    No system is going to be full proof.
     
  9. candycorn
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    candycorn Alis volat propriis

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    True.

    I was just pointing out how very convincing evidence could be planted as easily as you leaving it behind yourself.
     
  10. fncceo
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    fncceo Gold Member

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    Which is why we have juries. A single piece of DNA evidence would be only one piece in the entire evidence chain. Anything that corroborates that the accused was elsewhere when the offense took place would have just as much weight.

    Mostly, DNA, like fingerprints, and other circumstantial evidence is used to contradict the sworn testimony of the accused. For example, a gun is found in the car of the accused. The accused states, "I never laid eyes on that gun before". The gun is tested for fingerprints and DNA and if his are found on the gun, he loses credibility. If enough credibility is lost, he will be convicted.

    If the accused stated, "Yes, that's my gun. But, I never used it in the commission of a crime", then the DNA evidence does no damage to his credibility.
     

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