Theoretically, when a person passes through a place, he will leave his dandruff cells on the trails he passes.

As long as these dandruff cells can be collected, they can lock on to each other's DNA information.

Of course, in fact, it is not easy to determine this kind of spatial trace, because the number of dandruff cells is too small, and DNA identification cannot be carried out with current technical means, and only large pieces of dander or hair can be used for DNA identification in this regard.

"Attending the Wedding of an Ex-Girlfriend and Arresting the Groom on the Spot" Chapter 536 The poor little couple is hitting in the hand, please wait a moment,

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