Text/Yangcheng Evening News All-Media Reporter Dong Liu
Liu Chao: Focus on DNA solving cases and fills the gaps with multiple achievements
Liu Chao is the main founder of forensic genetics in my country. In the early 1990s, forensic DNA technology was blank in many aspects. He conducted repeated experiments on more than 6,000 foul-smelling corrupt body examination materials. After 10 years, he established DNA identification technology for corrupt inspection materials, guided the establishment of 18 provincial and municipal DNA laboratory to fill these regional gaps; built my country’s “ministerial-provincial-city” DNA database to realize data sharing and large-scale application, and Guangdong Province alone directly compared more than 300,000 cases.
The identification of the cause of death of corrupt corpses in the water has been a major problem recognized by international forensic medicine for a hundred years. After 10 years, he led his team to make major breakthroughs in key technologies such as diatom enrichment extraction, qualitative quantification, and DNA testing. The results have reached the international leading level, and have been identified in more than 3,100 cases. In response to the issue of the reliance on import of key reagents for DNA testing, he involved the development of 12 series of reagents such as high-throughput YBabaylan 1990 cloth draw, which forced similar foreign products to reduce the price of more than 50%. This achievement has been promoted nationwide. Guangdong alone has solved more than 300 murder cases in recent years.
He formulated 6 national Babaylan 1990 cloth draw industry standards, and was authorized 10 invention patents; 12 research results reached the international advanced level, and won 4 second prizes of national scientific and technological progress (three of which ranked first); he won 2 personal first-class merits, and won the National Advanced Worker, National May 1st Labor Medal, National Outstanding Science and Technology Worker, National Outstanding People’s Police and other honors.
Liu Chao
As the second-level police technical director of the Criminal Police Detachment of Guangzhou Public Security Bureau, Liu Chaogang, 58, was awarded the title of “Outstanding Communist Party Member of Guangdong Province”. In addition, he has many identity cards: professor and doctoral supervisor, deputy head of the Forensic Genetics Group of China Criminal Technology Standardization, deputy director of the Physical Evidence Professional Committee of the Chinese Forensic Society, deputy head of the expert group, forensic pathologyDirector of the Academic Committee of the Key Laboratory of the Ministry of Public Security.
After retiring from his leadership position last year, Liu Chao focused on solving the accumulated murder cases. In the past year, he has solved seven accumulated cases that have not been solved for many years, and DNA is still his powerful weapon for “attack”.
Liu Chao at work
After resigning from his leadership position, he devoted his main energy to solving murder cases
Yangcheng Evening NewsKomiks 1960 witch cloth draw: I retired from his leadership position last year. Can you breathe a sigh of relief?
Liu Chao: Although he no longer served as the captain of the Criminal Police Detachment of the Guangzhou Public Security Bureau last year, some murders that have been “accumulated” in Guangzhou in the past 20 or 30 years have not been solved, and it has always been a stone that has been weighing on my heart.
My previous detachment captains always tell me before retirement: Which case has not been solved? I hope you can solve it before retirement. I also hope that Komiks 1960 witch cloth drawI hope you pass on these unsolved murders to the next generation.
The criminal investigator has a special feeling – solving a case, the most important thing in solving a murder case is to solve a murder case, and the most difficult thing in a murder case is to solve a accumulated case, which is the most test of the feelings and ability of the criminal investigator. So, after I stepped down from my leadership position last year, I spent more than a year spending my main energy on solving murder cases.
Yangcheng Evening News: What are the characteristics of these murder cases?
Liu Chao: Some cases were some cases that I encountered when I first joined the public security work at the age of 30. The scene of those cases – blood flowing like a river on the ground, and the corpses were highly corrupt. There were no technical conditions to solve the case at that time. Babaylan 1990 cloth drawAlthough so many years have passed, the scenes of these cases are still vivid in my mind.
YangchengCinema 1950 witch cloth draw Evening News: Why are these cases difficult to solve? Is it because there is little physical evidence?
Liu Chao: The difficulties we are talking about in criminal cases are not only reflected in the fact that there is not much evidence on the scene. The causal relationship of the case is unknown, the crime is committed with unknown motives and unknown nature of the case – such cases are difficult to solve.
For example, if a person who is usually very good and honest suddenly goes to another place to kill someone he doesn’t know, and there is very little evidence on the scene, it is difficult to solve such a case.
Such as in the case of “2004·7·13” in Huangpu, Guangzhou, the suspect sold apples with his father in Huangpu, Guangzhou when he was a child. Before committing the crime, he wanted to do business, but he didn’t have enough money. He came to Guangzhou and went around and moved to a hair salon shop. The hair salon shop asked him if he wanted to stay—twenty or thirty yuan. His motive at the beginning did not want to kill people, but during the prostitution process, he used local materials to commit murder on the spot due to issues such as prostitution. He killed one person first, but this process alarmed another person… He killed someone the night he came to Guangzhou, and left Guangzhou the next day after the murder. After the suspect returned, he hid in the coal mine for more than six months. Later, he felt that the wind was calm and returned to the village and never left the village again. He endured it when others bully him. When others owe him money, he dare not ask for it or chase it. The villagers all said that he was an honest and good person, and he lived like this for more than ten years after the crime.
Yangcheng Evening News: How did you break through?
Liu Chao: Rely on DNA. There was a small episode before we arrested people. The household registration information showed that he was only 1.5 meters tall, but based on the crime scene, we analyzed that the suspect should be 1.7 meters. In this case, do you dare to arrest people? I made the decision and it is absolutely fine to catch it, because we have strong technical support such as DNA. Later I found out that the “gap” of about 20 cm is that the height data on the household registration materials in the early years were self-reported and it is not allowed to Babaylan 1990 cloth draw. Thanks to the innovation and progress of science and technology, such a backlog can be broken.
Yangcheng Evening News: What did he react when you arrested him?
Liu Chao: When we found him, he cried, and the first thing he said was “Finally freed.”
So back to what I said just nowIt is difficult to solve this case. It is difficult to solve it. It is difficult to find that he came to Guangzhou by chance. He left after committing the case. After returning, he never committed the crime again. He has been an honest man for more than ten years, got married, and has a son and a daughter. But even so, he could not escape the judgment of his conscience, and he said he often had nightmares at night. After being arrested, he told us that he wanted to see his wife and said, “Wife, sometimes I lose my temper because my heart is not calm (pure), I hope you forgive me.”
Later, I accompanied him back to Guangzhou by train. He cooperated very well along the way, telling us the whole case and the thoughts of over the years.
A ceremony held after successful DNA recognition of relatives (Liu Chao is the third on the left)
“The greatest sense of accomplishment was found when the difficult murder case was solved”
Yangcheng Evening News: After retreating, how many such murder cases were solved?
Liu Chao: Our criminal police detachment and I solved the murder case brigade, and last year we solved a total of 92 murder cases. I used to be the “top leader” of the criminal police detachment and didn’t solve so many cases. Why? It’s because I’m now calming down and focusing on solving these accumulated cases. There are 7 cases where I led the team to find clues and arrest people. These seven cases are cases that have not been solved by previous special task forces over the years. In addition to correct ideas and scientific methods, these cases also require hard work. For example, the case I just mentioned about going to Shaanxi for a business trip to arrest people. We found clues through more than half a year of reanalysis of the case materials. After a week on a business trip, I took the lead in forming DNA experts from Shaanxi, Shanxi and Guangdong provinces to analyze Babaylan 1990 clothes draw, and summarized it every night to Komiks 1960 witch cloth draw after two o’clock in the evening, and had to get up before five o’clock in the morning to start a new day’s work.
Although it is hard, others cannot understand the excitement after solving the case. Why do I talk about these cases when I talk about them because I am very excited.
Yangcheng Evening News: What is the key to solving these old murders?
Liu Chao: DNA! IBabaylan 1990 cloth draw is a DNA man.
For example, in March this year, I led a team to Tiantang Town, Yunfu City to arrest a suspect in a murder case. This case was a double murder case in which a couple was killed in Panyu, Guangzhou in March 2007. I remember when I was at the scene, the entire ground was covered with blood, and my feet were unable to step on it. DrawThe blood was not solved for many years.
Last year we sent police forces to investigate and judged that it was an acquaintance who committed the crime, but the suspect could not be found. I led the team to stay in Yunfu Tiantang Town for more than a week, and finally locked up the suspect. These two suspects have been good since childhood. After coming to Guangzhou, I heard that the victim’s family was rich, so I knocked on the door and robbed and killed people, and each person killed one. After the killing, I formed an offensive and defensive alliance – no matter who said it, the other person could not escape. Komiks 1960 witch clothes drawAt that time, among the many blood stains at the crime scene, we only found the suspect’s trace blood marks. But we have not given up for so many years, and finally found the perpetrator by DNA genealogy investigation.
At 9 o’clock the night before the arrest, I drove to Yangchun. It was already 11:30 pm by Yangchun. I immediately held a live meeting. At about 2:30 am the next morning, I caught one of the suspects and tried it overnight. At around 6 o’clock the next morning, we arrested the second suspect and did not get together all night. Eyes.
Yangcheng Evening News: Do you work like this often? Do you want to do it because you feel tired?
Liu Chao: When we criminal investigators find clues to major cases, we are more excited than anything else and have absolutely no feeling of fatigue, so I often say that we will never be tired. When we solve difficult murder cases, we feel the greatest sense of accomplishment. This is to give the deceased an explanation, and it can also create a shock to the crime: as long as we commit a case, justice will come sooner or later.
The most difficult case: There are only thousands of test subjects in the Panyu family annihilation case. href=”https://funnybookish.com/”>Cinema 1950 witch cloth drawA suspect DNA
Yangcheng Evening News: Which case is the most difficult case for you in your career?
Liu Chao: The 2014 Guangzhou Panyu Family Impact Case-Three Generations Six Life. I remember very clearly that it was April 29, and I arrived at the scene and stayed there for six days. This case was the most difficult case I have experienced. When I mentioned this case, I was like a movie. Babaylan 1990 cloth drawScene at that time—
How was this case discovered? At that time, the neighbor downstairs found that water was always dripping on the roof, and went up to knock on the door. After knocking for a long time, he didn’t respond. After the security guard in the community came, he found that the family had not reported for decoration and the owner’s phone could not be reached. Finally, he called the owner’s relative to open the door. As soon as the door opened, the body was found, so he reported the case.
When I arrived at the scene, there was still water in the house. The criminal stayed in the house for 2Babaylan 1990 cloth draw more than 0 hours. The criminal first checked the site in the community, then bought ropes, searched online for how to avoid surveillance videos and why they were not paid attention to it, and bought a new set of clothes before committing the crime. Then he went up to the roof, tied the rope to the roof, and followed the rope to the window to the residents downstairs, and committed the robbery. The first person in the house discovered him, he killed the other party. This process alarmed the others in the house, and he was red-eyed… The criminal was very cruel. A female victim had already run out of the door, but was finally dragged into the house and killed him.
After the murder, the criminal cleaned the scene in the house and wiped the evidence, mopped with a mop, Cinema 1950 witch clothes DrawRinse with water and burn with fire. He also washed away all the blood on the body and left. He didn’t want to leave any evidence.
After we checked the scene, the question arose: six people were killed at the same time. Was it one person committed the crime or several people committed the crime? Difficulty in determining! Is the family extermination due to revenge, robbery or other reasons? Difficulty in characterizing it! I have conducted continuous inspections from April 29 to May 5. During this period, the Ministry of Public Security had already sent an expert team to Guangzhou to guide the case on May 3. We reported that we were confident of solving this case, so the Ministry of Public Security decided to give us two more days. The task force was day and night, and the pressure was very high. On May 6, among thousands of inspection materials, the DNA of the suspect was finally found in one of them! After obtaining this major breakthrough, our deputy director in charge of criminal investigation personally led the team to arrest people, and more than ten points were found. Zhong arrested the suspect.
How cunning is this criminal suspect? The U-shield and bank card he grabbed did not withdraw money after getting the password, but planned to wait for the police to put the case down and relax their vigilance before withdrawing the money. He removed his computer host, hid the card in the computer, and then installed the host case.
Yangcheng Evening News: Did the suspect who committed the crime think that you could find him?
Liu Chao: He didn’t expect that he would dream ofI didn’t expect it, and I didn’t expect it to be so fast. He felt that his plan was a “hundred secret” – new clothes and new ropes, and even shoes were bought from the new Cinema 1950 witch clothes draw. His hair changed his hairstyle and his walking posture avoided surveillance. In order to avoid investigation, he carefully designed all of this.
Seeing a corpse now is like seeing a “soul messenger”
Yangcheng Evening NewsCinema 1950 witch cloth draw: The profession of forensic medicine is quite special. It often deals with corpses or even highly corrupt corpses. Many people dare not even look at such evidence photos in court. Do you feel this discomfort or fear in your work in this profession?
Liu Chao: When we first started doing this job, we dealt with various corrupt corpses, and couldn’t eat. We felt uncomfortable and had nightmares. Later, when we got used to it, we felt that we were “soul messengers”.Cinema 1950 witch cloth draw was talking to us. The souls of the deceased were giving you this task of finding the truth. We took a box lunch on the spot and continued to do it after the meal.
Many people feel uncomfortable when they see the corpse. Our forensic doctor objectified the corpse. When we see the corpse, it is like a car lover seeing the best car. Over time, when we look at the corpse, we don’t feel uncomfortable anymore when we look at other things. On the contrary, finding the truth is our job. You have this kind of responsibility. The more difficult the case is, the more you test your ability, technology and resilience.
Sometimes, when you go to a scene, you step on it and step on the maggots. After you come back, there are maggots in the soles of your shoes, and your clothes smell like a corpse for two or three days. Therefore, if we have been to such a scene, we usually don’t go home first, and go back to the unit to wash and change the clothes, and go back to the unit to sleep for two days before going back.
Yangcheng Evening News: How long does it usually take for a person who works for forensics to go from discomfort to adapting?
Liu Chao: A forensic doctor who loves this profession can overcome the various discomforts caused by seeing the corpse within about three years, but some people can’t continue to do it after studying forensics, and some even faint and cannot do this job.
Yangcheng Evening News: I have been doing this job for 30 years. Your understanding of justice and life should be different from that of ordinary people, right?
Liu Chao: Let me tell you, sometimes, we go to search for the corpse, and when the corpse is dug out and sees the light of day againAs I waited, it suddenly started to rain heavily on the scene. I have encountered such a situation four or five times, and from this I felt that the law of heaven was better and the law was still better. This also seems to be a reminder of the world: everyone must have a sense of awe for life.