Standard DNA Testing Can’t Differentiate Between Identical Twins.

Telling one identical twin from another poses problems for police. And it goes beyond appearances.
That’s because DNA profiling may be the gold standard for bringing criminals to justice, but when it comes to identical twins, standard testing can’t tell the difference.
So when crime scene DNA showed a match to a suspect in two rape cases in Boston in 2004, it showed a match to his twin brother as well.
Now, a Suffolk County prosecutor is trying to persuade a state judge to make her court the first in the country to admit a new forensic test that points to one of the twins — and not the other.

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