The commercial street in Ningtai County is modeled after Nanjing Road.
Of course, the prosperity and scale between the two are not directly proportional, but the leader's heart is worthy of praise.
In general, the most central commercial street in Ningtai County is to seal up an original road, open the shops on both sides, and demolish a few buildings to create businesses and expand the commercial space.
At the same time, there are small alleys and forks in the middle of the commercial street, connecting the crowds together.
Before online shopping became popular in the county, the commercial street was as dense as Changyang, the provincial capital, in terms of population density.
The discount store Jiang Yuan and others found was located at the corner of an alley and a commercial street.
And it is a blind spot for monitoring.
"This person has a thorough knowledge of surveillance." Wen Ming frowned as he left the police station.
He has been a criminal policeman for several years and has never seen such a difficult criminal.
Before that, the problems he encountered were mostly legal issues, procedural issues, and sometimes troubles from the victim's family or superiors.
This time the criminal gave Wen Ming a completely different feeling. It was a bit like going fishing with a lure. You thought there were snakehead fish in the pond, so you baited it, pulled a fake frog, and made various movements pretending to be a reptile.
But you actually don’t know whether there are snakehead fish in the pond until you take the bait.
Jiang Yuan in turn comforted Wen Ming, who was more senior, and said: "At least I got the shoe sample. When I go back, I can check other surveillance to see if there is anyone wearing these shoes."
Two discount store clerks also gave some descriptions of the murderer's appearance, but when the middle-aged man with a relatively popular appearance used language to describe it, it was really ordinary and ordinary, and it was difficult to use it as the basis for an arrest.
Although it was said that Huang Qiangmin had applied to his superiors for a portrait artist, no one had any hope.
There are currently only two working portrait artists in Shannan Province, and the workload is gradually decreasing.
The problem with the portrait is not a question of resemblance, but that it is difficult to find the murderer through the portrait. It is more about using it for reverse determination. That is, after catching the suspect, use the portrait to compare.
But when there are witnesses, this model is really like taking off your pants and farting, which is unnecessary.
Some units even believe that the portrait interferes with the investigation...
Still using the silver case as an example——
The reason why this case is famous throughout the country is because it exhausted all criminal investigation methods, but all the criminal investigation methods were useless. It has fingerprints, but the fingerprints are not successful; it has DNA, and DNA was done on all the men in the city, but still no success.
; It even has a portrait, and after catching the person, the portrait looks quite similar, but during the investigation stage, it still missed.
After the case was finally solved, 5 people in Su Province alone won first-class merit, 12 people won second-class merit, 19 people won third-class merit, and 24 people won awards.
It can be said that some police officers spent their entire life's efforts on this case.
Some people may say that in the movies and TV shows of the Free Beacon Country, there are some awesome portrait artists.
Because we are a country of immigrants.
The appearance of the immigrants' countries is highly differentiated, and it is easier for portraitists to capture the characteristics.
In many small places, a kind of gene expression may really be just such a person. For example, a big face, small eyes, a flat nose, or black hair. If you search the whole town, there may be just such a person, or there may be more.
Not going anywhere.
In some countries where inheritance is orderly and genetic integration is relatively sufficient, the job of portrait artist is not so easy.
Moreover, they were not trained in the early stage. When the professional level of portrait painters gradually improved, cameras were rolled out faster across the country.
On the other hand, in the lighthouse countries of freedom, people are unwilling to surrender their privacy rights to the government, and the installation of cameras is really limited.
Different national conditions lead to very different police operations.
Out of respect for the murder case, Huang Qiangmin invited a portrait artist from the province.
But the focus of the work is still scanning and monitoring.
A dozen people were circled out and began to scan the surveillance cameras in the imaging office.
The surveillance around the commercial street and the surveillance around Wanghe Building are just one area, but the surveillance over many days and the surveillance from different departments adds up to a huge amount.
That is to say, it involves a murder case. Otherwise, without a picture investigation department, just integrating these surveillance videos would be extremely difficult and burdensome.
This is also the core reason why various regions have established graphic reconnaissance brigades.
The main benefit of having the Scout Brigade is that it can combine the surveillance rights of various departments, reducing a lot of unnecessary internal friction.
As for work such as image enhancement, image detection departments outside provincial capitals do not pursue it.
You can't hire people, and even if you hire people, you can't keep them.
Jiang Yuan searched the footprint database through the sole patterns, but found no results. This means that the suspect really bought a new set of clothes in the store and committed the crime.
This also indirectly indicates that the criminal suspect was highly motivated and premeditated to commit the crime.
Therefore, according to the traditional model, the old detectives who followed the lines of grievances and resentments to explore the interpersonal network became energetic.
You must have a reason for planning the crime, which means you have a motive.
So if we can find the motive, or in other words, find the conflicting person, will we find the murderer?
The deceased was still a young man and had little social contact. Even including his family conflicts, there were not many people.
Several veteran detectives immediately set off to run around.
Jiang Yuan is not optimistic about this.
The reason is very clear. Although the crime was premeditated, people who want to kill people because of grudges and grudges are just ordinary people.
The suspect this time is not ordinary.
At least, he knows how to hide from surveillance.
This skill is not difficult to say, but it must have been learned, and it is not just a simple study, but also practiced.
When it comes to street surveillance, the cameras are basically not hidden, they are just there in plain sight. Even so, it is impossible for ordinary people or first-time offenders to avoid them all.
Even under the surveillance of Wanghe Building, the murderer avoided the gate and lobby, and probably entered through the employee passage or something like that.
Without surveillance video, there would be no need to even do image enhancement.
There are no footprints or fingerprints.
Jiang Yuan took out the autopsy photos taken by his master and looked at them several times, but found nothing.
In the past few days, some people have begun to question the question of homicide or suicide again.
At this time, the first batch of trace evidence sent to Changyang City was sent back.
Not only Jiang Yuan, but also half of the technicians from the criminal squadron came over to study.
Trace physical evidence often proves the existence of a certain substance. As for its meaning, everyone still needs to analyze and study it by themselves.
Each trace evidence test report is sealed in a kraft paper bag.
There are only a few pages in it, the specifications of A4 paper, with tables, data and analysis conclusions.
Jiang Yuan opened one copy, read one, and handed another to someone else.
Squadron leader Lu Jianfeng came back with the test report in person. He sat next to Jiang Yuan and watched him unpack the brown paper bag. He said with emotion: "Look at the services of this laboratory. One report comes in one bag. These hundreds of dollars are not in vain."
.”
Everyone could only smile together.
As the case progresses, the pressure has also spread to everyone.
At this time, a few hundred yuan for a trace evidence test is nothing.
Jiang Yuancai read the first report and handed it to the person next to him without saying a word.
The people next to me saw it and showed it to the people next to me.
Everyone silently circulated it.
Trace physical evidence in different locations may or may not be meaningful.
Interpretation is also more important.
However, the focus is still on those substances and contents that cannot be explained by common sense.
Jiang Yuan frowned and quickly flipped through half of the brown paper bag.
Just when his mood was a little low, a new conclusion in a brown paper bag attracted Jiang Yuan.
"They found sawdust among the trace evidence on the deceased's chest." Jiang Yuan tapped his finger, his eyes brightening slightly.
Lu Jianfeng immediately took it over to look at it, then looked at the picture specifically, then made a gesture on Wang Zhong's chest and said, "The location is very interesting. Did the murderer use a weapon?"
Jiang Yuan looked directly at Wu Jun: "Master, have you noticed the swelling here?"
"Is it on the chest? There is indeed a little swelling. I took a photo." After Wu Jun answered, he also took the trace evidence test report and took a closer look.
As he watched, Jiang Yuan's brain circuit suddenly switched on:
"It's a mop stick."
Jiang Yuan muttered something.
At this moment, several people's brain circuits were all connected.
"It's very possible." Lu Jianfeng slapped his thigh, stretched out his hand to gesture, and said: "Take a mop stick and poke the victim's chest, and you can knock him down. Look at the position of the shoes in the video and photo, are they right?
Is the distance just right?”
There were photos and other things in front of me, and several people spread out to look at them, and they all nodded.
"But the victim just stayed on the window obediently and let him stab him? And why did he climb up the window?" Gao Jiansheng from the Imaging Office gestured at the distance and asked the question at the same time.
"A good person climbs a window, either for money, or because he is wronged, or else, he is being bullied?" Wu Jun analyzed one by one.
"In this case, other employees in the deceased's company will be suspected." Lu Jianfeng pondered.
Jiang Yuan naturally followed this route and reminded: "We have to find this mop stick! This is now a murder weapon."
－－－－－－Digression－－－－－
I've been sleeping too late in the past few days and I can't stand it any longer. This is the only update for today.
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