The genetic information carried by each person's DNA is different. As long as the criminal is a recidivist, as long as he leaves any substance on his body including a hair, a drop of blood, or a bit of dander, the police can pass the identification The genetic information of human DNA immediately determines the identity of the criminal. Can it be launched from this? ['Police cannot identify genetic information carried in DNA of the first offender.', "The genetic information carried by the criminal's DNA will not change with the time of the crime.", 'Hair and blood on the same person carry different genetic information.', 'The identity of the criminal can only be determined immediately based on the genetic information of human DNA.']