Now that this dossier has been chosen.

Ye Mo also began to take over officially!

In 95, a case of murder of a female student in a health school was difficult to solve and beyond imagination.

Ye Mo himself was not sure, so the time limit he set for himself was fifteen days.

When he couldn't solve the case for three years, he only set fifteen days for himself.

Fifteen days later, if the case has not been solved, Ye Mo will re-select other cases from the file to be solved.

It took a long time to follow up until the unsolvable cases in the file were solved, leaving the most complex ones.

This is actually the same as our usual exam questions, don't stumble when you encounter a problem, first do what you can do, and then slowly solve it slowly, otherwise you will waste a lot of time in the process.

......

Soon, Ye Mo restarted the case, and the three of them began to carefully investigate the file.

This case cannot be broadcast live, an ancient unsolved case, if the murderer sees it, he will definitely try his best to escape.

This can be problematic to find the killer.

Ancient cases are different from recent cases, in recent cases, Ye Mo wished that the murderer had committed abnormal behavior in order to avoid police investigation, so that the more abnormal he was, the more people around him felt that something was wrong, and the person who reported it would appear.

......

In the office, after reading the file, everyone began to analyze the case.

In order to make the analysis of the case fuller, everyone also came, anyway, there is nothing big in the forensic department today.

One person's idea is certainly not as good as everyone's thoughts.

The more people there are, the more interesting the discussion becomes!

"The time of the case was in 1995, Longquan City Health School, which belonged to a secondary school back then, and has now been upgraded to a junior college, and the school has also been rebuilt, which is very different from before. Li Siyu said.

"The file says that the victim's family goes to the place where the girl was killed every year to pay respects, and the school has not rebuilt the toilet and surrounding environment at the place where the crime occurred in order to preserve evidence!" Liu Haoran said.

"It seems that this school still has a conscience, and in order to make money, it doesn't matter what case you don't have. Bai Lu said.

"There's no way, the impact of this case is too great, people were still more conscientious in the 90s, like now. Wang Baoqiang said.

"The file said that the murderer was the victim after the girl's evening self-study, when the girl was studying alone in the classroom at night, walked to the stairwell after the evening self-study, was attacked by the murderer, dragged to the men's toilet on the first floor for assault, and was found naked when she was found with the clothes on her body next to her!" Liu Haoran said.

"What is the murder weapon?" Ye Mo asked, Ye Mo didn't like to read the file, he liked to ask questions, which could help him analyze, he didn't like a lot of words in the file, he just wanted to connect them according to the key places he wanted.

"The murder weapon was a steel iron rod of the construction site, which was under construction next to the school at the time, and it was easy to pick up this kind of cut steel roller, which was thicker than a thumb and more than a meter long, and was found at the scene of the crime. Li Siyu took out the photo of the scene as he spoke, and in the photo, a bloody gang was placed next to the victim.

"In other words, the victim was violated after he died, right?" Yang Mi asked.

"It is recorded in the dossier that the first scene was in the stairwell, where there were traces of blood. Liu Haoran replied.

In other words, the murderer struck the girl on the head with an iron rod in the stairwell, causing her death, dragged her to the men's toilet to violate it, and then threw the murder weapon aside and left in a hurry. Teacher He asked.

This is stated in the file, but it is not clear whether the victim was completely dead at the time, or that the killer hit the victim on the head in the toilet. Liu Haoran replied.

"How old was the victim at the time, and where was he from?" Ye Mo asked.

"18 years old, local. Liu Haoran replied.

"Have you collected the fingerprints and DNA evidence of the murderer?" Ye Mo asked.

"The police took the murderer's fingerprints on the door of the men's toilet and detected sperm spots on the victim's body. Liu Haoran said.

"Are there fingerprints and DNA? What if you put it now, don't you just solve the case?" Bai Lu was shocked.

"At that time, the technology was backward, and the surveillance was not covered, even if you had DNA fingerprints, it was useless, in fact, there were many such cases in those days. Li Siyu said.

"There are fingerprints and the case has not been solved until now, which means that the murderer has never applied for a second-generation ID card, and in the public security system, the national census records over the years have been screened, and the list of people who are alive has not yet been processed for the second-generation ID card, even if I check them one by one, I have to find out. Ye Mo said.

The second-generation identity handling needs to enter all the fingerprints of the ten fingers of the handler, and the fingerprints collected at all crime scenes from the history of the country to the present will be compared.

Since in the public security system, all fingerprints do not correspond to the fingerprints of this case.

So it means that the murderer has not gone to the public security system to enter fingerprints and apply for a second-generation ID card.

"If you don't go to the police station for a long time to apply for a second-generation ID card and can't contact you, your household registration information will be frozen, and the murderer is likely to be really gone. Liu Haoran said.

"If the murderer is dead, this case will really be headless. Bai Lu said.

"Indeed, the probability that the murderer is still alive is less than 3 percent, in short, no matter what, let's check it first, and then say it after fifteen days, even if the murderer is dead, there must be a result. Ye Mo said.

"That's right, but if he doesn't die, even if he is seventy years old now, he will have to meet the punishment of the law. Liu Haoran said.

"Team Ye, I'll go to the technical department for screening now?" asked Li Siyu.

"Don't worry, wait until the scope is narrowed down, there are other possibilities, there are only three fingerprints in the file, if the murderer cuts off his fingers, then when applying for an ID card, you can only enter the fingerprints of your fingers, so that you can also avoid pursuit, and you can also be directly excluded, at least, I want to find out, the specific household registration of this person." Ye Mo said.

"It's still Team Ye who is thoughtful, I understand. Li Siyu nodded.

The advantage of this case over the previous case 16 years ago is that the police took the suspect's fingerprints, although only three fingerprints.

But these three fingerprints are the key to solving the case.

We don't need to enter DNA for the second generation of identity, but we need to enter fingerprints for all ten fingers.

This means that in the public security system, all people who have applied for second-generation ID cards have fingerprint information.

With this, the direction of investigation is relatively simple.

In the current society, it is difficult to move an inch without a second-generation ID card, and real-name authentication is required no matter what you do.

Therefore, the murderer is either dead or in a black state.

Of course, there is also a possibility that the murderer cut off his finger, resulting in no fingerprints of the murderer in the database.

There is no other way.

Fingerprints cannot be forged, fingerprints are unique characteristics of each person, and fingerprints are stable and immutable, so a person's identity can be accurately determined through fingerprints. (If you read a violent novel, go to Feilu Novel Network!)

If you want to forge fingerprints to enter into the public security system through some method, it is simply impossible.

"In order to solve the case, the public security organs also compared the fingerprint information of more than 3,000 people, including all the teachers, students and employees of the school, but still found nothing, so it can be basically determined that the murderer is not the relevant personnel of the school, and the school at that time was open, in fact, many people outside could go in for a walk, that is, after the case, all universities and colleges in the country did not allow people from outside the school to enter at will, and they must register their ID cards. Liu Haoran said.

"For so many years, I have not found the corresponding DNA fingerprints in the public security system to prove that the murderer is not a habitual offender, and he has not committed a crime since, not even petty theft. Li Siyu said.

"Judging from the whole case, the murderer was improvised, he didn't hide the corpse, he didn't hide the murder weapon, he even left fingerprints and DNA, he is just an ordinary citizen, I suspect that the murderer was drinking at the time, passed by the campus, and found that there was a girl studying alone in the evening study room, so he had a temporary evil idea!" Ye Mo said.

"The file said that at that time, the school security department saw a sneaky man coming out of the men's toilet, and he realized that something was wrong, so he immediately went to the men's toilet to check, and then found the body, and immediately raised the alarm, but unfortunately the murderer escaped!" Liu Haoran said. []

In other words, it only took about half an hour from the time the case was discovered to the time it was discovered. Ye Mo said.

"There are fingerprints, DNA, and witnesses in this case, which cannot solve the case, which shows how backward the technology was at that time. Teacher He shook his head.

"There were too many unsolved cases in that era, all of which had force majeure factors, and the police had been chasing the culprit for three years at that time, and they had done their best. Teacher Guo said.

"Now, you can catch it at night, and the surveillance camera is really a weapon for solving cases in contemporary times!" Bai Lu said.

"According to the oral account of the security department, the murderer is about 175 years tall, about 30 years old, with short hair, wearing a black shirt and jeans.

"I'll take a look at the portrait!" Ye Mo said.

Liu Haoran immediately took out the portrait of the murderer.

It has to be said that the painters at that time lacked some level, but the facial features of the murderer were mastered.

"The murderer had short flat hair, a square face, and a lot of acne on his face. Liu Haoran said.

"The geography of our place, the locals basically don't have acne on their faces, so the murderer is most likely not a local. Ye Mo said, the weather in Longquan City is relatively cold, and people here don't like to eat chili peppers very much, so there are very few people with hot acne on their faces, unlike Jiangxi, Guizhou, Yunnan, Guangdong, Guangxi and other places, where the weather is easy to get angry.

The southern region is relatively humid and the temperature is high, which can easily lead to the strong secretion of skin oil and the clogging of pores, which can lead to acne.

The northern region is dry and cold, and the temperature is low, and such climatic conditions have a certain inhibitory effect on skin oil secretion, so relatively few people have acne in the northern region.

Basically, the locals who were born and raised in Longquan City, except for pimples, will not have any hot acne on their faces when they are over 30 years old.

And according to eyewitnesses, the killer had a lot of acne on his face, which was the biggest feature.

"'The murderer was not from the school, nor was he a local, he was about 30 years old at the time, and now it is estimated that he is not yet 60 years old!" Li Siyu said.

"It was night, and the murderer had a lot of acne on his face, so it wasn't necessarily 30 years old, maybe younger, around 25-30. Ye Mo said, people with sores on their faces generally look old, so their age cannot be pushed upward.

After this analysis, a lot of information came out.

"Preliminary analysis, the murderer is an outsider, aged 25-30 and about 175 tall, and is not a habitual offender. Liu Haoran said.

"It was raining at night, and the murderer also left footprints in the toilet, according to measurements, the shoe size was 41 yards, and the footprints were yellow rubber shoes that were popular at that time!" Li Siyu said.

"Most of the people who wear these shoes are people who are engaged in heavy physical labor, construction workers, porters, etc. Ye Mo said.

"There was an iron factory near the school, and everyone in the iron factory wore these shoes, and everyone in the factory also did fingerprint comparison at that time, and the murderer was not found. Li Siyu said.

"Wasn't the school expanding at that time, and did the workers in it check it?" Ye Mo asked.

"I've all checked it, and I don't have any information about the murderer!" Liu Haoran said.

"If the murderer is 30 years old and now 58, if he is 25 years old and 55 now, then he is between 55 and 60 years old. Ye Mo said.

"Good!" Liu Haoran recorded.

In addition to the city, between the ages of 55-60, who have not registered a second-generation ID card and are still alive.

There is also a registration, but the fingers are not complete!

All of a sudden, the range narrowed again.

But for now, it's all speculation.

Just a high probability range.

There are also locals who have sores on their faces, and there are also 20-year-olds who are as old as 40 years old.

But if you want to solve the case, you can only analyze it like this.

You have to put yourself in the murderer's shoes.

"The deceased was 18 years old, excellent in character and learning, 165 tall, local, outstanding in appearance, his parents cremated his body after his death, and now he will go to the school every year to pay respects, and his family has never given up looking for the murderer, and they will come to the detachment every year for questioning. Li Siyu said.

"The difference in the previous case is that after Ms. Zhao's death, no family members came, so her bones were kept in the detachment until the case was solved, and the bones were still preserved and entered into the Criminal Investigation Museum. Liu Haoran said.

"Ms. Zhao is gay and withdrawn, and her family doesn't want to see her. Li Siyu said.

"I simulate the situation at that time, I am a 30-year-old man, I live near the school, I will go to the school for a walk every night, I drank some wine that day, passed the downstairs of the internship building, and saw a good-looking girl from the window in the evening self-study, so I went up and found that she was the only one in the classroom, so I had a bad thought, found a stick from nearby, hid at the staircase, and when the girl returned to the dormitory after self-study, she beat it with a stick to knock her unconscious and violated, but she didn't expect the girl to react violently, in order not to let people find out, so she beat her head wildly, causing her to fall unconscious, and then took it to the men's toilet to violate, and left in a hurry after the incidentYe Mo said.

......。

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