Strange twists and turns! A 20-year-old murder case with three lives will eventually escape the law.

　　Cctv news: pay attention to a murder case that has been dusty for 20 years. On September 2, 1998, Yan Yang, an English teacher from a middle school in Ordos, her sister-in-law Chen Yanhua and Yang Yannian’s eight-year-old daughter were killed at home in broad daylight, which shocked the local area. After the incident, the police were always looking for clues to solve the case. Twenty years later, the case finally got clues, but it was extremely complicated and had many clues. Let’s first understand the case.

　　At noon on September 3, 1998, Dongsheng Branch of Ordos Public Security Bureau received a report from a man that his sister’s family of three had been killed at home.

　　This residential building, which was built in the 1990s, is the place where the murder happened. Locals call it "Three Buildings". The scene of the crime center is the one on the fifth floor of the innermost unit in the middle building.

　　After investigation, the police learned that Yan Yang, an English teacher in a local middle school, her sister-in-law Chen Yanhua and Yan Yang’s daughter Lele were killed, and Mr. Yang, Yan Yang’s younger brother, reported the case.

　　Mr. Yang, who felt something was wrong, told his father about it. Later, the two went to Yang Yan’s house to find out.

　　The police immediately blocked the scene and the investigation began immediately. As the drafter of the sketch map of the crime scene in that year, Bubu, a policeman of the Interpol Brigade of Dongsheng Branch, still remembers the layout of the crime scene today.

　　After the preliminary autopsy of the three victims, the forensic doctor found that two adult women died of hemorrhagic shock after being stabbed, and the murderer’s tool for committing the crime should be a single-edged sharp instrument.

　　After the autopsy of the victim Lele, the forensic doctor concluded that Lele’s death was drowning. In addition, through the autopsy, the forensic doctor concluded that the time of death of the three victims should be one hour after the meal.

　　Examination of blood revealed that the murderer was injured when he committed the crime.

　　In the subsequent autopsy, the forensic doctor tested the blood types of the three victims under the limited technical conditions of the year.

　　The test finally concluded that the victim Yan Yang was type B blood, Chen Yanhua was type A blood and Lele was type AB blood. In addition, there was a type A blood left at the scene. This type A blood was distributed on the bathroom wall, the kitchen floor and the kitchen sink at the crime scene, with as many as 30 places, but it was not the victim Chen Yanhua’s.

　　On this basis, the police have a bold speculation that this strange type A blood is probably the murderer’s. He was probably injured when he committed the crime, and he was seriously injured. After finishing the case, the murderer probably washed his hands in the kitchen, accompanied by the process of cutting. In addition, along with this type A blood, there are several blood footprints at the crime scene.

　　According to these blood footprints, criminal technicians also portrayed the basic characteristics of criminal suspects. A person with a medium posture, about 1.70 meters, aged around 30, and leaning to the right when walking.

　　The passbook money was not found at home but was taken away.

　　According to the clue provided by Yan Yang’s younger brother, he came to the victim’s house on the day of the crime and returned the passbook and 500 yuan borrowed before. However, the police searched the whole house and couldn’t find the passbook and the 500 yuan.

　　In the subsequent visit to the local bank, the police found that the passbook with the victim’s name was taken away by 11 thousand yuan. At that time, several health school students who withdrew money wrote down the appearance of the man who withdrew money.

　　The police simulated the portrait and drew the appearance of the suspect.

　　Dongsheng police found Zhang Xin, a criminal investigation expert specially invited by the Ministry of Public Security who is good at simulating portraits, to draw the appearance of the suspect. With this portrait, Dongsheng police searched tens of thousands of people and found nothing. The suspect was as missing as into thin air.

　　Besides, is it a love killing or a vendetta? Whether acquaintances commit crimes or strangers commit crimes, or whether several people commit crimes can not give a conclusion.

　　With the passage of time, this case has also been buried in people’s memory. However, the local police never stopped chasing the murderer.

　　In recent years, with the development of criminal science and technology in China, the turning point of "9.2 case" appeared on April 25th, 2018.

　　This is the DNA laboratory of Criminal Investigation Brigade of Ordos Public Security Bureau. At this time, the policeman Su Lei routinely compared the DNA information of the 9.2 case as usual. When Su Lei entered the data that I don’t know how many times I took it out into the system one by one, the system suddenly got a hint.

　　Su Lei, a policeman from the technical room of the Criminal Investigation Brigade of Dongsheng District Branch of Ordos Public Security BureauThere is nothing after each match. It writes a zero and there is nothing. After entering that day, I found that it came out with a piece of data. What it says is relatively simple. From that interface, it can be seen that it was entered by the Public Security Department, and then it was written in Jiuyuan District of Baotou in 2011, and there was nothing else.

　　This is the first time in 20 years that this case has clues. The man in the police DNA comparison was a man who died on Daqingshan Mountain in Jiuyuan District of Baotou City many years ago. At that time, after investigation by Baotou Public Security Bureau, it was determined that the man committed suicide. After the criminal technicians extracted the remains for DNA comparison, they found that the dead man in Daqingshan and the suspect in the case belonged to the same family.

　　Exclude suspects but belong to the same family as suspects.

　　Since it is a family, the police’s first task is to confirm the identity of this man on Daqingshan. However, during the two-month investigation, the police traveled all over the villages and mining areas around Daqingshan without any gains. Just then, news came from forensic doctors that they found something strange on a tooth when analyzing the remains on Daqingshan Mountain.

　　Baiyinbing, Director of Technical Office of Criminal Investigation Brigade, Dongsheng District Branch of Ordos Public Security Bureau: Our local name is front incisor, which is actually the middle and front teeth. There is a small gap, which is called melon seeds teeth in our local area, which is formed when we consider cracking melon seeds. Most of the considerations are when you are growing up. If you start to crack melon seeds after adulthood, the structure of the teeth and bones is relatively solid, and this change will not be formed.

　　The police decided to look for a breakthrough from the planting area of melon seeds. To this end, they came to Inner Mongolia Agricultural University and found relevant experts to seek answers.

　　Comparing the DNA database again has unexpected results.

　　When the police came to Urad Zhongqi, Bayannaoer City, they were surprised to learn that the local public security bureau had also established its own DNA database two years ago. The investigators put the DNA data of the "9.2 case" into the database for comparison, and there was an unexpected gain.

　　Like the man in Daqingshan before, the Li brothers are not suspects in the "9.2 case", but belong to the same family as the real murderer. But their appearance pointed out the direction for the police’s next investigation.

　　After investigation, the police learned that the hometown of Li’s two brothers was in the shepherd sea in Urad Zhongqi. Subsequently, the police immediately rushed to Muyanghai to conduct a secret investigation.

　　After many days of secret collection, investigators have learned that the Li brothers are distributed in Wulate Zhongqi, Wuhai, Baotou and Dalate Banner in Ordos.

　　According to the speculation at the time of the crime, the possibility of an acquaintance committing a crime cannot be completely ruled out. Therefore, in this investigation, in addition to the investigation of several places such as Fugu in Shaanxi, the focus was placed on Dalat Banner in Ordos City. Sure enough, in the first batch of DNA samples sent for inspection, there was a result.

　　According to the age of the murderer in the year of the crime, it should be around 30 years old. Then, twenty years later, the murderer should be around 50 years old. And Li’s age is around 70 years old, which is quite different from the presumed age, so the suspect can basically be ruled out. The police further investigated that Li had three sons. Among them, Li’s eldest brother died in 2016. So, will the real murderer be among the three sons of the Li family?

　　Soon, the investigators sent Li Laosan’s DNA to the laboratory, but it was quickly excluded.

　　Li Jia died of illness without any DNA extraction.

　　However, after the death of Li’s eldest brother, his family cremated his body. Dongsheng police had to extract the biological samples of Li’s eldest child according to law and conduct paternity test with the DNA information of the suspect in the "9.2" case. After DNA comparison, the suspicion of Li’s eldest child was ruled out.

　　Two of the three sons of the Li family have been ruled out, leaving only the second son, Li Moucheng. Soon, Li Moucheng’s DNA was sent to the laboratory.

　　Su Lei, a policeman from the technical room of the Criminal Investigation Brigade of Dongsheng District Branch of Ordos Public Security BureauAfter we added the site review, we found that as far as we are sure, Li Moucheng is the suspect who left blood on the crime scene of "9.2 case".

　　The real murderer is just around the corner, and what kind of arrest plan to make has become the top priority in front of the police of the task force. According to the investigation of the scene in that year, it is not ruled out that Li has an accomplice. What if the accomplice escapes when he catches it with great fanfare?

　　After investigation, the police learned that the suspect Li Moucheng usually likes fishing. Moreover, at the moment he has gone out to the fishing gear shop to buy fish food.

　　With the arrest of the suspect Li Moucheng, this unsolved case that has been dusty for 20 years has finally uncovered all the mysteries.

　　After comparing Li Moucheng’s fingerprints, footprints and handwriting, the police determined that he was the murderer who made this appalling case 20 years ago.

　　According to the confession of the criminal suspect Li Moucheng, on the morning of September 2, 1998, he gambled with his friends in Dongsheng. After several rounds, he lost all his money and even his pager. In order to get the pager back, he asked someone to borrow money everywhere. Then he suddenly remembered a place.

　　According to the suspect Li Moucheng, he came to the victim’s home in three buildings to borrow money, and the person who opened the door was the victim Yan Yang. Because he was in a bad mood after losing the gambling game at noon that day, he had a drink before coming. Looking at Li Moucheng who was full of alcohol, Yan Yang was disgusted.

　　In order to prevent things from being exposed, the suspect Li Moucheng simply killed the other two. After finishing the case, the suspect Li Moucheng began to look for property in the victim’s home.

　　Blood was left at the scene of hand injury during the crime.

　　In addition, during the crime, the suspect Li Moucheng’s hand was also injured, which led to the existence of the strange type A blood at the crime scene.

　　According to the confession of the criminal suspect Li Moucheng, after the withdrawal from the first savings office was rejected, he first went to a remote hospital to dress the wound, and then came to the second savings office.

　　At this point, this unsolved case that has been dusty for 20 years was finally broken.