• 5too@lemmy.world
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    3 个月前

    In addition to the donated hair lacking DNA, they can only do DNA matching against samples they already have or could legally acquire (generally with a warrant).

    So if she’s not otherwise in their system or already a suspect, she should be in the clear!

    • WanderingThoughts@europe.pub
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      3 个月前

      Turns out you can use DNA from relatives too. And with large databases of ancestry this can go up to 4th cousins and narrows it down from there.

      • tempest@lemmy.ca
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        3 个月前

        Yeah this is exactly the thing.

        You can narrow down suspects from millions to hundreds because your cousin needed to see that they are 34 percent German or whatever.