• Yes, there can be mistakes like contamination, but this is usually found and corrected. If they have you dna there, the old court room highjinxs of saying dna doesnt work is long dead.
  • What accuracy are you talking about? An actual DNA match can be as accurate as 99.9999%. However, the actual accuracy of DNA results from public labs is 66-82%. The discrepancy is based on human error. DNA results must be interpreted, which creates the error. This is much like how fingerprinting was many years ago. The likelihood that a fingerprint match belongs to the donor is extremely high (over 99%). However, determining whether or not you actually have a match used to require physical comparison by a human, which dramatically lowered the accuracy rate.
  • DNA is extremely accurate.

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