Mao Ji knew that Li Xiang wasn't professionally trained. He only had some fragmented knowledge from hearsay about the basic comparison of DNA data, thinking that as long as he knew the victim's DNA data, he could quickly find the victim's family through big data, even relatives from the same lineage couldn't escape under DNA comparison.
To some extent, this idea wasn't wrong, but it really just remained theoretical and didn't stem from practical experience.
There are many kinds of DNA comparison techniques. Different DNA testing methods have varying accuracy, sensitivity, and specificity, requiring the choice of an appropriate comparison method to ensure the accuracy of the results.
Comparing completely identical DNA is quick, but comparing parent-child DNA can have great errors.
To ensure accuracy, the police use dual-parent comparison.
