What is the reason for the local public security bureau to draw blood?

Blood collection at the police station is actually blood collection, that is, collecting citizen information and filing.

Its purpose is to enter the information base and compare DNA. In the future, the suspects will be identified through the verification of information base and site traces.

Article 130 of the Criminal Procedure Law of People's Republic of China (PRC) stipulates:

In order to determine some characteristics, injuries or physiological conditions of victims and criminal suspects, people can be examined, fingerprint information can be extracted, and biological samples such as blood and urine can be collected.

If the suspect refuses to check, the investigators may force the check when they think it is necessary. Benefits of blood sample collection

1, blood sample collection is more accurate than fingerprints, and the one-to-one matching degree is higher. You can find the answer by directly backing up DNA, even if you go to Mars.

Criminals will have nowhere to escape. As long as the police collect the information on the scene, they can immediately determine the target, which greatly improves the detection rate. In the past, twins could use the same ID card. After all, they look the same, and it's hard to tell them apart. After blood collection, similar things will not happen.

3. The problem of missing children has been solved. In recent years, more than 3,600 children have been retrieved through DNA technology, and they have been safely sent back to their parents, making countless families find happiness again.

4. When going out in the future, you can prove your identity only by retina, fingerprint and blood sample identification, which is more convenient to travel and saves a lot of time and cost.

5. The hospital can also match the patient with a suitable blood donor according to the blood sample collected by the ID card, which greatly improves the chances of the patient being rescued.

Entering personal information for the establishment of social management information base is the need of social management and has no influence on individuals.

But I must tell you: after entering the information base, if you have any illegal and criminal acts, you can quickly lock yours through the information held by the investigation organ.

It is difficult to compare after extraction, and the error rate will be higher.

Newborn fingerprints are unstable under 2 years old, so it is difficult to compare after extraction, and the error rate will be higher. It is difficult to solve this problem through technology, so it is of little significance to collect newborn fingerprints to prevent abduction. In 2009, the Ministry of Public Security established a national kidnapping DNA information database. Parents who have lost their children can collect and test blood samples at the expense of the public security organs.

Collecting the DNA information of all newborns is equivalent to comparing the pre-stored information of children with the DNA of suspected abducted children. This method is similar to collecting the DNA of parents of lost children now. Therefore, it is not necessary to collect the DNA of all newborns for the time being.

The role of DNA:

1, the anticodon can recognize the mRNA codon and transport the corresponding amino acid, which is used as the carrier of protein synthesis. Together with ribosomal protein * * *, it forms a ribosome, which is the place where protein is synthesized.

2. It can replicate itself accurately, thus maintaining the genetic continuity between parents and offspring.

3. It can guide the synthesis of protein and control the metabolic process and character development; Genetic variation occurs under certain conditions. Ribose and phosphoric acid (hydrophilic) are outside, and bases (hydrophobic) are inside, forming large grooves and small grooves on the surface.