Known as DNA shedders, some people naturally transfer more of their DNA when they make skin contact with objects. A new test to ascertain a person's "shedder status" could help determine if their DNA in a mixed profile sample is the result of a very recent or earlier contact with the object.

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Known as DNA shedders, some people naturally transfer more of their DNA when they make skin contact with objects. A new test to ascertain a person's "shedder status" could help determine if their DNA in a mixed profile sample is the result of a very recent or earlier contact with the object.