Feb 19, 2009 | 3
Fingerprinting and analysis of hair fibers and marks made by weapons are familiar forensic tools to those of us who love crime shows, never mind to criminal defendants on trial and those who say they were wrongly convicted by evidence based on those techniques.
So you may be surprised to learn that none of those methods—which comprise the majority of what most real-life labs do—have been scientifically validated, and of the techniques commonly used in the nation's forensic labs, only DNA analysis has been rigorously proved to match a suspect to a crime.
Those are the conclusions of a new report released yesterday by the National Academy of Sciences (NAS). "In terms of the reliability and accuracy in making individualization conclusions, it is fair to say that, with the exception of nuclear DNA analysis, there is a lot we do not know about other forensic disciplines," said the NAS panel's co-chair, Constantine Gatsonis, director of the Center for Statistical Sciences at Brown University, in a statement.
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Conventional washing machines cause excessive damage and wrinkling to clothes primarily during the water removal step. With the introduc
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The Dow Chemical Company is the leading producer of polyalkylene glycols (PAGs) used in synthetic fluids and lubricants where petroleum,
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