Forensics Questions

Discussion in 'Forensic Science' started by Alyssa, Jan 1, 2002.

  1. egeria

    egeria This mod is Ready for the Laughing Gas!

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    Yes, bullets can be matched to a specific gun and not just a make/model.

    A good article on ballistics
     
  2. JorjaFoxFan

    JorjaFoxFan CSI Level One

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    that's my question too, i've wondered that every time they have an anaphylactic shock victim on the show but never found the answer..
     
  3. forza juve

    forza juve Hit and Run

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    In one episode of csi miami. I think it was a season 6 episode, they identified someone who opened a safe with his knuckles because apperently they're as unique as finger prints, yet in the season 9 opener of csi, they said the knuckle prints on warricks car window cannot be identified because they're not unique. Which is the truth?
     
  4. Franzeska

    Franzeska Victim

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    It looks like biometrics researchers have explored the possibility of IDing people based on knuckles but the techniques aren't widely accepted. The only reference I could find was this:

    Jungbluth, "Knuckle Print Identification" (Abstract), Journal of Forensic ID, vol. 39, No. 6, (Nov.-Dec. 1989), pp. 375-380.
     
  5. singinglupines

    singinglupines Civilian

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    Another good site is http://www.firearmsid.com On the left side there are many links covering everything in depth about the identifying marks on casings and bullets. Specifically at http://www.firearmsid.com/A_nogunid.htm they describe how using general rifling characteristics one can limit it down to specific make, model, and the possible manufacturers of the firearm from which the bullets were fired. If they are sending data directly to a data bank, you are correct in assuming that it would only work with two dimensional evidence, fingerprints.
     
  6. ash09

    ash09 Dead on Arrival

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    In the CSI: Miami episode "Internal Affairs", a man was killed from a blank at close range. Can the paper inside the shell casing really kill a person? I'm skeptical. Sure, the paper may have been going quickly from the gunpowder, but would it have enough inertia to travel through a guy's throat? Any input on this would be much appreciated :)
     
  7. Dynamo1

    Dynamo1 Head of the Swing Shift

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    Actually, ash09, it can definitely happen. Jon-Erik Hexum, the star of 80's TV series called "Voyagers" (not to be confused with Star Trek Voyager) and "Cover Up", killed himself that way. From his bio at imdb.com:

     
  8. ash09

    ash09 Dead on Arrival

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    Wow... thanks for clearing that up, Dynamo1.
    That's so sad... I always thought that they dramatized things to make interesting plotlines. Good to see that they are at least mostly realistic.
    Again, thanks for the prompt response.
     
  9. Dynamo1

    Dynamo1 Head of the Swing Shift

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    I can't vouch for everything they do on all three of the CSI series, but they do have real life forensics experts as technical advisors. They might exaggerate some of the processes, like DNA tests in minutes or hours instead of days or weeks. But they try to squeeze a case into about 45 minutes so they cut some corners.
     
  10. squinn1201

    squinn1201 Rookie

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    In Monday's episode of CSI Miami, Horatio ground down a tooth from Eric's father. Instead of extracting DNA as I thought they would, Horatio ran tests on the tooth to determine where his father lived as a young child. They said that the tooth retains an isotopic record of the geographical location the person had as a child or adolescent.

    I had never heard of this and I was wondering if anyone knew if this is true or not.:confused:
     
  11. egeria

    egeria This mod is Ready for the Laughing Gas!

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    Out of curiosity I googled your question and came up with this article summary which would appear to confirm that you CAN take an isotopic record of teeth. The 'Abstract' section is where I was reading from.
     
  12. squinn1201

    squinn1201 Rookie

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    Thanks Egria! I assumed there must be some logic to it, as the writers do use actual forensics specialists to assist them. However, that article confirms it.
     
  13. Dizzney

    Dizzney Moderately Insane Moderator

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    Gosh, I remember him. He was such a good looking guy too. I remember hearing about that, I had watched the show. :(

    Similar thing happened to Brandon Lee too, another star who was died way too early. From IMDB
     
  14. 11krage

    11krage Dead on Arrival

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    In a episode of csi during a game hodges 'died' from a prefired bullet that was matched via ballistics to a destroyed weapon. It was fired from a small doohicky that presumably (please correct me if I'm wrong) left no extra striation markings.

    1. What exactly was the doohicky and how does it work?

    2. Is there a way to make or use something that can fire a prefired bullet without adding extra striation markings or distorting the ones already there longer range, say the distance from the roof of one building to the window of another in new york. Or is this only possible at short range?

    3. If a prefired bullet is slightly misshapen through previous impact will this affect its trajectory or impact affect?

    Don't worry no criminal intent here, just curious.
     
  15. egeria

    egeria This mod is Ready for the Laughing Gas!

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    Hey 11krage, I've been googling and trying to find an answer to your question but no luck so far.

    wikipedia has an excellent article on ballistics though, you might want to check that out.
     

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