* Expert states the odds of a DNA misidentification are 1 in 100 billion.
BUT THEN ...
* State crime lab analyst Kathryn Troyer was running tests on Arizona's DNA database discovered two criminals with
remarkably similar genetic profiles.
* It matches at nine of the 13 locations on chromosomes, or loci, commonly used to distinguish people.
* The two criminals were not related: One was black, the other white.
* Later Troyer found dozens of similar matches — each seeming to defy impossible odds and defied the statistics.
* Some experts predict a search would produce one or more examples of unrelated people who are identical at all 13 loci.
* Such a discovery was once unimaginable.
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