novelraw Chapter 180 Group investigation
Chapter 180 Group investigation
click.
Projection toggle.
These are two sets of tire marks.
We collected a total of two sets of tire tracks at the scene.
The first set of tire marks are the tire marks of a tricycle.
We compared the tricycles of Wang Fugui and his wife, and we can confirm that the tire tracks on the tricycle belong to them.
The other set of tire tracks is a bit weirder.
Everyone look at the screen...
Click to switch between projection screens.
Appearing above are four tire marks.
Of the four tire marks, the two in the middle are consistent, but the two on the sides are not.
Team Leader Chen, the general situation at the scene is basically these.
Chen Yan nodded.
Get up and walk to the whiteboard.
According to what we have so far, we first need to confirm the identity of the deceased.
Judging from the degree of physical damage to the deceased, the murderer either had a deep hatred with the deceased, or deliberately damaged the body to mislead our investigation vision.
Now, let me arrange the next stage of work.
Captain Zhao, please work hard. Divide all the detectives of the detective squad into five groups and follow up with my next deployment.
Zhao Haiyang got up and saluted: Yes, Team Leader Chen
The first group is responsible for tracing the origin of the necklace on the neck of the deceased.
Click.
The projection screen switched, and it was the photo of the necklace on the neck of the dead body.
This necklace is the only thing on the body of the deceased.
The necklace is made of gold, and here it is...branded.
The first group is responsible for finding out the origin of this necklace, who bought it, and where it was bought from.
When the murderer kills the dead,
It was impossible not to notice the existence of this necklace.
However, he still kept the necklace, which shows that the possibility of the other party's making money is relatively small, and the possibility of vendetta and love killing is relatively high.
Finding the necklace makes it possible to identify the deceased.
The second group visited various plastic surgery hospitals in Shen City.
Click.
The projection screen switched again: Everyone look here, the nose of the deceased was cut off by a sharp knife.
The nasal bone is exposed, but the deceased's nasal bone has friction marks. From this point of view, the deceased should have had a nose plastic surgery before his death.
Track down all the hospitals in Shen City that can perform nose plastic surgery, and see if you can find out the identity of the deceased.
At the same time, the third group followed up on the situation of the severed finger on the deceased's foot. Judging from the scars on the deceased's toe, it was similar to an operation performed in the early years. In major hospitals, all the people who had undergone amputation of the fourth toe were asked. Check identity.
The fourth group... to trace the origin of the thorns in the body of the deceased.
The projection changes again.
This kind of thorn is a common thorn shrub in the wild. However, because of the sharp thorns, even in rural areas, most people would not collect it for fire.
So, when it's okay, no one makes this kind of thing.
Look around, where is there such a thornbush near the place where the body was dumped?
In fact, judging from Chen Yan's judgment, the fatal injury of the deceased should be caused by excessive bleeding after being stabbed by thorns.
The murderer was so cruel, what kind of hatred did he have with the deceased?
In addition, there were welt marks on the body of the deceased, some new and some old.
It shows that the deceased was likely to have been bullied for a long time during his lifetime.
When it comes to the investigation of Thorns, the faces of many detectives are not very good.
Such a brutal crime scene is extremely rare.
The murderer's behavior can already be described as abnormal.
The fifth group, focus on tracking tire tracks.
Chen Yan collected his thoughts and continued to deploy his work: On the one hand, we need to inspect the tricycle of the informant Wang Fugui and his wife.
Including whether there is any friction between the iron cage and the box in the carriage, and whether the tire marks on the tricycle match the scene under different load-bearing conditions.
Although Wang Fugui and his wife were the informants, there was no surveillance at the time, and they were also suspected of committing the crime.
Therefore, it is necessary to check the tricycles they use.
On the one hand, if they shout Stop Thief, then they should use the iron dragon transported by tricycle.
Then, during transportation, the iron cage will inevitably come into contact with the box of the tricycle.
In this way, it is easier to find some clues.
On the other hand, even if the other party has been prepared for a long time, such as wrapping the cage with something like a quilt to avoid bumping.
However, the weight of the iron cage plus the deceased was at least 150 kilograms.
In this case, the tire marks when the tricycle increased its load by 150 kg, and when it only carried Wang Fugui and his wife, must be different.
And a second set of tire tracks.
Click.
The projection screen switched, and Chen Yan pointed to the second group of tire marks: This group of tire marks, the two tire marks in the middle are the same, it should be the tire marks of a motorcycle.
On both sides, there are different tire marks, but the depth of the indentation is basically the same.
So, it is very likely that it is a motorcycle, pulling a cart, and the tires on both sides of the cart are not the same.
This point is easy to explain.
For the tires of the stroller, if one side is severely worn, it is also possible to change to a tire with a different pattern.
After all, trolleys are all pushed by manpower.
The speed is not fast, and even if the tire patterns on both sides are inconsistent, there will be no rollover.
After the five tasks were arranged, everyone took orders to leave.
In the conference room, there were only Chen Yan and Zhao Haiyang.
This case is somewhat unusual.
The murderer's viciousness was far beyond Chen Yan's imagination.
Its method even has some perverted meanings.
The whip marks on the deceased also showed that the deceased may have been bullied often during his lifetime.
However, this person loves beauty very much, otherwise, he would not have undergone rhinoplasty.
And iron cages.
The place that should have been locked has been welded.
Judging from the traces of welding, it should be the situation in the past few days.
However, is welding such a thing accessible to ordinary people?
Chen Yan looked at Zhao Haiyang: Captain Zhao, we are still setting up a group of people to follow up all the welding shops within 100 kilometers of the corpse dumping site.
The other party can use welding to weld the iron cage to death, so there must be welding equipment.
This kind of thing, most people don't have it.
Zhao Haiyang nodded: Okay, I'll make arrangements now.
After leaving the meeting room, Zhao Haiyang arranged the work intensively.
...
afternoon.
The fifth group was the first to return the message.
Team Leader Chen, the tricycle of Wang Fugui and his wife has been inspected.
Click, the screen projection is turned on.
We checked Wang Fugui's tricycle, and found no relevant bump marks on the box.
At the same time, we compared the tire indentation depths of the tricycles.
It is in line with the situation of the tricycle carrying Wang Fugui and her wife.
Chen Yan nodded: In other words, the possibility of Wang Fugui and his wife using a tricycle to transport the iron cage is basically ruled out?
The leader of the fifth group nodded: That's true.
Also, Wang Fugui and his wife are still in shock.
When we went to visit, both of them stuttered.
Clearly still hasn't recovered from the scare it caused today.
Indeed, when I went fishing early in the morning, I found a dead body on the net.
Moreover, the corpse was brutally damaged...
The other group of car marks, how is the investigation going?
The investigation results of this group of car marks have made great progress.
In the afternoon, we simulated the scene of motorcycles and carts on site.
At the same time, a driver drove a motorcycle and put the weight equivalent to the iron cage and the corpse into the small cart...
It turned out that compared with the traces on the scene, the indentation is a bit shallow!
Shallow indentation?
What's the meaning?
Shallow indentations mean that the cart or motorcycle is not loaded enough.
What causes it?
This kind of simulation does not mean that you can just find a cart to do it.
Things like car marks show much more information than expected.
First of all, it is the tire pressure of the tire. No matter how the load changes, the normal tire pressure of the tire can actually be inferred from the tire marks.
Because, the load changes, showing that the tire ground contact area increases.
This increase in area has two aspects, one is that the tire sidewall contacts the ground, and the other is the tire landing site, and the front and rear ground contact areas increase.
Through the calculation of the model, there is a set of fixed calculation methods for the ground contact area of the front and rear tires and sidewalls of different loads.
This is tire track analysis.
In fact, it is a science.
At present, this method is very mature.
So there are only two reasons for this problem.
Chen Yan frowned slightly, and looked at the person in charge of the fifth group: You mean...the person who threw the corpse was a very heavy fat man...or is it that the person who threw the corpse was not alone?