In addition, even if there are hair follicles in the hair, if they are contaminated with blood or other fibers, the test results may be incorrect.

According to the overtime processing of the DNA laboratory, this DNA was still identified, but it took a lot of effort, and this DNA data did not find a matching result, after all, China has not perfected the DNA database so far, which is different from foreign countries, and people who have no criminal record are basically public security departments......

"Unforgivable Sins: A Guide to Criminal Investigation and Chasing the Murderer" Chapter 87 Clever Tricks to Catch the Murderer is in the hand, please wait a moment,

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