There is DNA deep in the pond

From folk stories, we can know the cultural background and humanistic feelings at that time.

Here's what I recommend for you: DNA is deep in the pond:

On a secluded path in Jinfeng Town, Zhangjiagang City, Jiangsu Province, a piece of pig iron weighing dozens of kilograms lay quietly. It is impossible to verify when and by whom this pig iron was discarded. But it was this unprovoked pig iron that triggered a bloody case that shocked the whole city, and two fresh lives disappeared instantly. ......

Little grandson's windowsill fright

There is a small forest on the northwest side of Jinfeng Town. There are two bungalows facing east in the Woods, covering an area of more than 30 square meters. A courtyard is surrounded by bamboo and wood around the bungalow. There is a small river at each end of the house. Shagang Group, the largest private iron and steel enterprise in China, is in the west, with large rape fields in the south and villagers' houses in the north. In two bungalows, there lived an old couple in Henan who were in their fifties. The man's surname is Zhang and the woman's surname is Yao. This used to be a waste collection station run by their son Zhang. More than a year ago, Zhang moved to other places to do business and handed over the waste collection station to his parents to continue his business.

On May 1 2009, Zhang learned that the waste collected by his parents was piled up in the yard, so he made an appointment with his parents to help them transport the waste out and sell it the next morning.

On the morning of May 2, Zhang called his parents early, but he called many times and only heard the doorbell ring, but no one answered. So he asked his son, who lives not far from his parents, to "scout" his grandparents' home to see what happened. My son hurried to see that the yard door was locked by a padlock. He called several times, but no one answered. So he squatted on the windowsill of the room and looked in, but because the dirt on the window glass was too heavy, he couldn't see clearly. The little grandson knocked on the window, but no one answered for a long time. He feels terrible. So he picked up a brick on the ground and smashed the window glass, opened the screen window and looked in. I saw grandma * * * with a bloody face, lying on her back and her legs resting on the bed ... The little grandson was so scared that he quickly ran to his uncle's house nearby, and his uncle and wife rushed over and found that Yao, the hostess, was dead and immediately reported the case to the local police.

This case has attracted the attention of the police. After receiving the report, Zhao Jinlong, the director of Zhangjiagang City Public Security Bureau, led the fire criminal technicians to the crime scene and quickly carried out on-the-spot investigation and on-the-spot investigation. During the investigation, it was found that Zhang, the male owner, was killed in his own waste collection station, covered with many waste products, while his wife Yao was killed in the yard and moved to an indoor bed. ......

Such a major murder occurred during the festival, which cast a shadow on the hearts of citizens who are celebrating May Day. For a time, the "5.2" murder case became the focus of general concern and discussion from all walks of life, and its influence was very bad. The case was immediately listed as a listed supervision case by the Provincial Public Security Department. Director Sun Wende and Deputy Director Wang Qi successively instructed that practical measures should be taken to solve the case as soon as possible. Zhang Yuejin, the deputy mayor of Suzhou and the director of the Municipal Public Security Bureau, immediately rushed to the crime scene to guide the investigation, and set up a task force attended by the main leaders, in-charge leaders and more than 200 policemen of Suzhou Municipal Bureau and Zhangjiagang Municipal Bureau.

As soon as the task force was established, it took a series of investigation measures-investigating people around the scene who met the conditions for committing crimes, and screening and screening people who suddenly left without reason after the incident; Investigate the relationship between victims, focusing on those who have business relations with victims, especially those who have economic entanglements; At the same time, the police comprehensively collected the surveillance video around the crime scene and implemented special personnel to watch it repeatedly in order to find clues of the suspect. ......

Later facts proved that these measures played a very important role in the detection of cases.

Interception of physical evidence and dam building

Witnesses and physical evidence are two major elements in solving a case. The informant was a relative of the victim, whose identity was quickly confirmed. But who is the murderer? How many/much? Do you know the victim? Why did he (they) kill two old people who collected waste products? A mystery remains to be solved by the police.

All kinds of waste are piled up in the yard and house of the waste collection station. The indoor floor is uneven, the furniture is relatively crude and rough, and there is a lot of blood on the scene. Investigators found a mutilated bloody shoe print at the murder scene. It was identified that this shoe print was not left by two victims. In addition, the mobile phone, earrings and watches of the deceased couple are all on the table. The turnover area at the scene is not large, but the trousers pockets worn by Yao are turned out, which shows that the gangsters searched the property after killing. However, the specific property losses are difficult to determine for the time being. After the victim's children arrived, they found gold and silver jewelry and other property hidden by their parents. This shows that the criminals came to ask for money, but they didn't find it because the victim hid it well.

The image characteristics of criminals are often of great guiding significance to the process of solving crimes. According to the incomplete bloody shoe prints left at the scene that did not belong to the old couple, as well as the same tools and the same killing methods used by the two victims, the task force concluded that the murderer was the same person.

According to the information obtained, the task force made the following analysis of the basic image of the criminal: this person is strong (because the deceased Zhang is tough) and familiar with the scene and the victim; Its living environment may come into contact with threaded steel bars; This person is financially strapped and badly in need of money; Have certain anti-detection ability, and may have a criminal record of robbery; And received some professional training (because it is very important to hit the victim with a blunt instrument); Judging from the process of committing crimes, the nature of the case is a premeditated robbery and murder case, but it does not rule out that there is also a certain degree of revenge. ......

The situation of the victim and the general situation of the perpetrator are basically clear. The key now is to find the perpetrator through physical evidence.

The task force believes that the physical evidence was "written" on the wound of the deceased. After forensic identification, the deceased Zhang suffered multiple skin contusions, contusions and lacerations, and the wound edge was incomplete, skull fracture. How are so many contusions formed? Forensic medicine found that many dentate epidermis fell off at the contusion surface 1cm, and some contusions were accompanied by parallel strip contusions, with regular protruding texture on the surface, characterized by being hit by metal bars (such as rebar). A similar situation was found in the wound of his wife Yao ... It can be seen that both husband and wife died of the same weapon, that is, metal bars such as rebar. Forensic identification shows that the two men were killed at about 3 am on May 2. ......

The police went to Shagang Group, not far from the crime scene, to analyze and investigate the model of rebar, and concluded that the crime tool was rebar blunt instrument, with thread spacing of 1cm and diameter of 2cm! The old couple were crushed to death by this steel bar. So, where is the rebar used for the crime? Investigators searched every corner of the center and found no trace. Careful investigators estimate that the murder weapon was probably thrown into the Donghe River near the acquisition station by gangsters.

Local people say that the police in Zhangjiagang have always been generous in solving cases. That's what happened. In order to find the rebar, the police in Zhangjiagang spared no effort to cut off the flow and build a dam to find the material evidence. After estimating the general orientation of the rebar abandoned in the only road after the gangsters went out to kill people, the task force organized personnel to build a dam at one end of the river to intercept the river, and then drain all the water at the other end.

When the pond mud dried up, I saw a steel bar with a diameter of about 2cm obliquely inserted in the pond mud in the middle of the river, which was undoubtedly the murder weapon. Because there are probably traces left by the murderer or the victim on the rebar, in order to prevent the traces 63cm being lost, the investigator took off his shoes and socks, went to the rebar with a deep foot and a shallow foot, and slowly and carefully "hugged" the rebar with the pond sludge attached to it. The sludge in the pond was blown dry by the wind and sent to the DNA laboratory of the Institute of Criminal Science of the Municipal Bureau. Results A small amount of human tissue was found on this steel bar. Through DNA testing, it was determined that these human tissues came from Yao, and the police concluded that this steel bar was a crime tool. The tools for committing crimes have been found, but the person who uses them must also be found, and this person must be the "owner" of the bloody shoe print!

"Jin Shuaiwei" Skynet is restored.

According to the unified deployment of the task force, investigators carried out the work of finding shoes with the same sole pattern as blood shoes in Suzhou. The vast sea of shoes, according to the incomplete shoe prints to find its "kindred", the workload can be imagined. However, despite the difficulties, with tenacity, the investigators found the "Wei" brand casual shoes produced in Jinjiang, Fujian Province in Changshu Merchants City, Wuzhong District, Suzhou, which were the same as the shoe prints left at the crime scene. Following this clue, the investigators learned that before April 2009, six pairs of white "Jin Shuai Wei" had been sold in the "Xintiandi" supermarket in Jinfeng Town. However, because the supermarket is located in the center of the town, there are many shops and frequent people, the salesperson can't remember the appearance of the shoe buyer. ......

Nevertheless, this investigation result has played a great role in solving and closing the case. Because "Platinum Shuai Wei" soon appeared in Skynet. After several days and nights of careful observation, the investigators in charge of reading the surveillance video around the crime scene saw the clues. At 4: 3 a.m.1on the day of the crime, a "shadow" came out of the scene, passed the splendid Toyota Holiday Hotel, and then walked eastward along Jin Dian Road. At 4: 39, the "shadow" passed the intersection of Jinfeng Middle School to the east and then disappeared.

Is this "shadow" a criminal? The image is very blurred, and the overall image is not clear. The only thing that can be seen clearly with the naked eye is the white shoes worn by Shadow. Are these white shoes "Jin Shuai Wei"? It's hard to see from the image. So, around the whereabouts of the "shadow" that night, the investigators looked back at the previous surveillance video, and soon made a new discovery: at 2: 07, the "shadow" who also wore white shoes walked through the Holiday Inn Tian Tian and walked west along Jin Dian Road. The direction of going west is the crime scene; 1: 58, this surveillance video is clearer than before, and it can be seen that it is wearing a gray shirt, jeans and white sports shoes; The investigator adjusted the video to 5 o'clock, 5: 18, and the image was clearer. A suspicious man in the same costume (with an eagle behind his coat) dragged a suitcase and walked eastward. The physical characteristics of the man are very similar to the "shadow" in 1: 58.

The key now is whether the men who appeared in these periods are the same person? The task force asked to carefully check the surveillance video of the Internet cafe near the crime scene, taking white shoes as the "grasping hand" and mainly extracting people wearing white shoes for comparison. This investigation idea quickly achieved practical results: when the investigators looked at the surveillance video of Jinfeng Internet Cafe, they found a young man (with eagle pattern on the back of his coat) who was the same as the above-mentioned clothes leaving the Internet Cafe on the day of the crime 1: 46. ......

At this point, the task force confirmed that this person is the "shadow" that appeared in the above different periods. Through visiting local residents and reading relevant materials, I learned that this person's name is Chen Xiaohui, a native of Sichuan. He used to be a soldier and a security guard, but he lost his job. He has been staying in a hotel near Jinfeng Middle School since April 17, and has been in arrears with his rent. Go out in May 1 and return to the hotel after 5: 00 am on May 2. I paid my bill in cash and left the hotel with a blue suitcase. ......

At this point, the suspect Chen Xiaohui has completely surfaced. On May 20th, the police obtained the information that Chen Xiaohui appeared in an Internet cafe in Hefei, Anhui Province by high-tech means, and then flew to Hefei to capture him.

After arriving at the case, Chen Xiaohui confessed the crime truthfully. During the day of May 1 day, he found a big iron block on a small road next to the construction site on the west side of the crime scene. Because it was too heavy to carry, he went to the scrap collection station opened by Mr. and Mrs. Zhang not far away and asked them if they would accept pig iron. The other party said yes, and Zhang pushed the car back. But Chen Xiaohui asked them for money, but they didn't want to give it, thinking that the pig iron was already on the way, not from Chen Xiaohui ... Chen Xiaohui was bitter, so he cheated the door in the name of selling waste products in the early morning of the next day, and then raided Zhang Yaomou to death with rebar. Later, he took out 400 yuan RMB from Yao's trousers pocket and fled. ......

The above is the whole content of DNA deep in the pond. You are welcome to share the story with your relatives and friends!

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