novelraw Chapter 173: During an avalanche, no snowflake is innocent
Chapter 173: During an avalanche, no snowflake is innocent
Wang Xiurui found a total of six surveillance video materials.
The first surveillance video.
This was discovered by the surveillance camera at the entrance of the business plaza near Li Wei's home.
Wang Xiurui began to introduce.
There is a shoe repair shop at the entrance of this square. Through the visit, we probably know the time when this shoe repairer appeared nearby.
In the video, the cobbler is pushing a bicycle.
The bicycle is relatively old, and the rear seat must have been modified to some extent.
There is a shoe repair box.
But because of the angle, the face of the cobbler was not captured in the video.
In the rest of the video, is there any shot of the shoe repairer's face?
Wang Xiurui shook his head and looked at Chen Yan: Team Chen, in the video we found, there is no surveillance camera to capture this person's face.
Katsa.
Screencast switch.
Only in this video, the other party's eyes were captured.
The video plays.
The cobbler still has his back to the camera.
However, when he got up to pack his things, the side face of the shoe repairman was captured by the camera...
He's wearing a mask?
Looking at the video, only one eye was exposed, Zhang Yaoming said in surprise.
Yes, Team Zhang. Wang Xiurui nodded.
During our visit, we found that this shoe repairman was always wearing a mask and a sun hat.
No one has seen what this man looks like.
Not only that, Chen Yan walked to the screen: This person is very cautious.
Every time he chooses a shoe repair location,
You see, it's all in this kind of corner.
There are very few surveillance devices around, and even if there are, they can only take pictures of his back.
And the cobbler's hand.
This person was wearing gloves all the time, not showing a bit of skin.
Everyone look here again.
Chen Yan pointed to the edge of the shoemaker's sun hat with his right hand: There are six video surveillance systems, but none of the video recordings show this person's hair.
And ears...
Even the eye, there is only one...
Chen Yan carefully stared at the eye in the video.
Dan Fengyan is very attractive.
But it was this eye that made Chen Yan unable to tell whether this person was a man or a woman.
Can you guys tell if this person is a man or a woman?
Everyone frowned.
They couldn't answer Chen Yan's question.
I asked a few people in the shoe repair shop, and some of them had contact with this shoe repairer.
Wang Xiurui stepped forward and walked to Chen Yan's side, with a solemn expression: These shoe repair shops actually have certain rules in their locations.
Two stores cannot be opened in adjacent streets.
Chen Yan nodded.
Today, the job of repairing shoes is not what it used to be.
Don't say that the shoes are worn out, they are worn out, and they may be thrown away.
Therefore, if a shoe repair shop wants to have a business, it must cover a wide range.
If there are two or three shoe repair shops on one or two streets, how can everyone make money.
So is the itinerant cobbler.
If you enter someone else's territory, they will definitely ask you.
But this cobbler doesn't communicate with them at all.
Just pack up the booth and leave.
So, we have no way to determine whether this person is a man or a woman during the investigation.
Wang Xiurui paused, and then said: However, judging from the figure of this person in the video, he is about 1.7 meters tall.
It should be more likely that men can handle so many shoe repairing things.
However, I think the equipment for repairing shoes is not light... If it is a woman, the possibility should be relatively small.
Chen Yan is also more inclined to this judgment.
It's just that the eyes of this...
Chen Yan was a little uncertain.
But, anyway, it's an important clue.
At the scene of Song Pengcheng's spontaneous combustion, Chen Yan carefully examined the half of the body.
The burning of the corpse can first be determined from the outside to the inside.
Moreover, Song Pengcheng's body was charred on the upper body and carbonized on the lower legs and soles of the feet.
If you look at it this way, the fire should be burning from the upper and lower directions to the middle.
This is rather strange.
Judging from the burn marks on Song Pengcheng's body, the ignition points should be scattered.
However, how did the burning of the soles of the feet start?
Moreover, from the remaining flesh and blood of the scorched calf, Chen Yan found a long network of scorched marks.
It is similar to the radioactive network traces produced after being shocked by electric shock.
At that time, the autumn rain in Feng County was continuous drizzle, and there was no thunder at that time.
No lightning strikes were seen either.
So, where did this suspected electric shock trace come from?
Now, has the cobbler ever appeared?
Wang Xiurui shook his head: The people who visited the shoe repair shop near Li Wei, Chen Pingping and Wu Jian's country said that they haven't seen this shoe repairer in the past two weeks.
The time of his appearance is probably concentrated between September 1st and 15th.
From September 1st to 15th...
At this time...
In the spontaneous combustion incident, the earliest time occurred on September 19.
In other words, if the other party planned it deliberately, the preparatory work should have been completed on the 15th.
Captain Wang, next, you have to continue to track down this shoe repairer.
Chen Yan began to make work arrangements: If the other party really has a problem, then the planning may have been completed before September 15.
In the later stage, it is very likely that it will not appear again, but...
The mobile shoe repair vehicle used by the other party is not newly assembled. Someone must have used it for a long time. Find this mobile shoe repair vehicle!
Chen Yan turned around and looked at Lin Hao: Captain Lin, how is Song Pengcheng's autopsy going?
Lin Hao shook his head: I just asked, it will take some time.
Chen Yan nodded: Song Pengcheng's autopsy results are very important, let's speed up the progress as much as possible.
Lin Hao nodded.
He understood what Chen Yan meant.
Song Pengcheng was the only one who left corpse residue in the spontaneous combustion.
His autopsy report is likely to unlock the secret of spontaneous combustion.
Today is the 27th.
Three days have passed since the 24th.
...
The task force has entered the busiest stage.
The work assigned by Chen Yan was very meticulous.
Each group is doing its best to complete its own tasks.
It was Qin Yun who gave back the information first.
Zhang Yaoming sent out to verify the person in charge of Yun Guifang and Chen Pingping's relationship back then.
Captain Chen, my investigation is basically over.
On the projection is the personal data of Yun Guifang's family: The enmity between Yun Guifang and Chen Pingping has a long history.
The specific thing started when the two fell in love with a doctor...
The information Qin Yun brought back was basically the same as what Liang Huifang told Chen Yan.
Yun Guifang's son is called Wang Qiao.
A few years ago, after failing to compete for the position at the First Hospital of Dan City, I went to Shen City.
Currently working in Shen City Second Hospital, and is already the attending physician of the department.
In the past three months, he has not returned to Dan City. His mother, Yun Guifang, has been raising Wang Qiao's children in Shen City, and has not lived in Dan City recently.
Zhang Yaoming frowned: In other words, although Yun Guifang has a grudge with Chen Pingping, the two haven't met each other recently?
Qin Yun nodded: Moreover, we also investigated Yun Guifang, whether she knows Li Wei and Wu Jianguo.
However, according to the current investigation results, none of Yun Guifang's family members had any contact with Li Wei or Wu Jianguo.
So, I personally think that Yun Guifang's family...has little to do with this case.
Chen Yan nodded.
He agreed with Qin Yun's opinion.
There must be a connection behind the deaths of Li Wei, Wu Jianguo and Chen Pingping.
However, since Yun Guifang's family has no contact in this regard, they can temporarily consider lowering their suspicion.
After Qin Yun's report was over.
It was Wang Jian who brought back the news.
Wang Jian was the detective sent by Zhang Yaoming to search the houses of Li Wei, Chen Pingping and Wu Jianguo.
Team Chen, Team Zhang, we have made a major discovery!
Wang Jian, who rushed back, was elated, and the expression on his face was very excited.
What did you find?
Zhang Yaoming got up to meet Wang Jian and asked anxiously.
It's like this, Team Zhang, our group was divided into several groups according to Team Chen's arrangement, and we inspected the three families...
First of all, we immediately checked the house where the three deceased lived.
However, nothing was found.
The spouse of the deceased is more cooperative.
Next, we also searched the house where the deceased's children lived.
Li Wei's son is studying in the capital, and there is no housing in this city.
Cheng Pingping's son, Song Pengcheng's family, we also found nothing unusual.
Wu Jianguo's youngest son teaches in No. 1 Middle School of the city and lives in a collective dormitory. Nothing unusual has been found...
However, we found this at the home of Wu Jianguo's eldest son...
Several members of Wang Jian's team carried a box onto the conference table.
Team Chen, Team Zhang, please look!
Wang Jian carefully opened the box, revealing the contents inside.
Shoes... an umbrella?
Zhang Yaoming looked at the two things inside with some doubts.
Team Zhang, these shoes are the leather shoes of Wu Jianguo's eldest son, Wu Jianxiong. Look, this heel has just been repaired.
And this, the umbrella, is a brand new umbrella.
According to Wu Jianxiong's confession, the umbrellas were distributed by their construction site half a month ago, and they have not been used yet.
As for the shoes, they were repaired by a mobile shoe repairman in front of his house...
Chen Yan picked up his shoes and umbrella and watched them carefully.
At first glance, there is nothing wrong with it.
There are two brand new studs on the left and right feet of the shoes.
The quality of the umbrella is very good, and it is relatively thick in the hand.
Immediately send it to the laboratory for examination.
Chen Yan put the things back into the box: Tell the laboratory that there may be chemicals in the main umbrella, and take care to prevent fire.
And this shoe, be careful when handling it, especially inside the heel, there may be an electric shock device.
chemical materials?
Shock device?
Captain Chen, are you suspicious...the four of Li Wei spontaneously combusted...is it caused by this umbrella and shoes?
Zhang Yaoming is not a fool.
As soon as I heard Chen Yan's prompt, I understood what Chen Yan meant.
as predicted.
Chen Yan nodded: It's just a guess at the moment...but we have to wait for the results of the autopsy for the specific situation.
Four people spontaneously combusted to death.
Everyone is wearing an umbrella on a rainy day and wearing repaired shoes.
This is the only three commonalities that Chen Yan found in the four videos.
So, here comes the problem.
Why?
Why must it be rainy?
The four spontaneous combustion cases were all on rainy days.
Can't it be sunny?
Could it be that the rain caused the four people to spontaneously combust?
Give me a break.
It is common knowledge that rain can put out a fire.
Of course, when the temperature reaches a certain level, there are also some specific conditions, such as electrical fires.
After rainwater is decomposed into hydrogen and oxygen, it is actually an excellent combustion aid.
But does the human body naturally have such a high temperature?
So why on a rainy day?
Willing to have only one.
That is the umbrella.
People use umbrellas only on rainy days.
The other is shoes.
Why were all four people's shoes repaired?
The chances of such a coincidence are too low.
So what exactly do the shoes do?
In other words, what is the function of repaired shoes?
Based on the investigation of Song Pengcheng's corpse, Chen Yan made a bold guess.
I guess that rainy weather, umbrellas, and shoes are the necessary conditions for the victim to spontaneously combust in rainy days.
But how on earth are they related?
Katsa.
The projection switch is a screenshot of the video before the four people spontaneously combusted.
Because of the height of the video camera installation, all the videos are taken from an overhead angle.
We can't see what's going on under the umbrella.
When Li Wei died of spontaneous combustion, there were no witnesses around. When Chen Pingping and Wu Jianguo died, although there were witnesses, they were already on fire when they found out.
So, we never knew what happened the first time these three people died.
For example, whether to burn from the inside out, or from the outside to the inside.
Do you start from the top first, or from the bottom, or from the middle?
We didn't figure it out until Song Pengcheng died.
When Song Pengcheng spontaneously ignited, Wang Jie, the security guard of Feng County Hospital, watched Song Pengcheng walk out of the gate and go to the parking lot.
So, he witnessed the fire under the umbrella that the surveillance did not capture.
According to Wang Jie's description, he saw a ball of fire, which seemed to be pouring from Song Pengcheng's head.
And what's on Song Pengcheng's head?
Umbrella!
Chen Yan pointed to the screenshot of the video: That's right, it's the umbrella!
Also, according to the burn marks on the remains of Song Pengcheng's body, there are several burn spots of different sizes.
These burns are in line with Wang Jie's description of the flames falling from Song Pengcheng's head.
Chen Yan switched photos again, and it was the remains of Song Pengcheng's body: Moreover, these burns have already burned holes.
If Wang Jie and the others didn't use three fire extinguishers to put out the fire immediately, the corpse would be reduced to ashes soon.
So, I suspect that several people spontaneously ignited the ignition point, even with the brand new umbrellas they were holding.
Katsa.
Picture switching.
It is the shoes of four people in the video.
Next, let's talk about shoes.
Let me tell you a hypothesis. If, if there is a fire falling from our heads, what is your first reaction?
Chen Yan looked at Lan Feng.
run!
My first instinct was definitely to run and get away from the danger.
Chen Yan looked at Wang Jian: What about you?
If I also have an umbrella in my hand, I must throw it away, run, or roll on the spot...
right!
You are all right!
but!
Li Wei, Chen Pingping, Wu Jianguo and Song Pengcheng...why didn't they run away?
Everyone Zhang Yaoming, Lan Feng, and Wang Jian also reacted.
Yeah, why didn't these four people run away?
No matter what the situation is, whether it is internal combustion in the body or external causes.
Why don't the four of them run away?
Could it be because the fire was so fierce that it burned them to death in an instant?
Chen Yan shook his head and looked at Wang Jian who was speaking: Even if the fire was very big and violent at that time.
However, the four of them shouldn't have no reaction time at all.
Besides, not only did they not run, they didn't even make a cry for help.
Or, not even the instinct to roll on the ground trying to put out the fire.
This unscientific!
Is there... is there any way to make them...not make a sound or try to put out the fire when the fire is burning?
Lan Feng knew what Chen Yan meant.
When the four died, the fact was that they did not make a cry for help, nor did they take the initiative to put out the fire.
So why?
Chen Yan looked at Lan Feng and nodded: Yes!
How did the murderer do it?
Before Song Pengcheng died, I was also puzzled.
Katsa, photo toggle.
Everyone look here.
This is the lower limb of Song Pengcheng's corpse. On his leg, there are scorched marks showing network radiation.
This kind of situation usually occurs only after the high-voltage electric shock, the current is too large, and the protein is coked.
So, I suspect that the deceased had been punctured by high-voltage electricity before his body caught fire.
The body and the brain have been devastated.
Therefore, the four people failed to respond in the first place to call for help or put out the fire.
Because, before they caught fire, they were already in a paralyzed state.
Card wipe.
The video plays.
That's why, as we saw in the video, the four of them froze slightly and burned to death directly.
Turn off projection.
Chen Yan returned to the main seat: Of course, all this is just speculation.
In the umbrella, what caused the deflagration? Is there really an electric shock device in the shoes...
We have to wait for the autopsy report to prove it.
Also, the shoes and umbrella that Wang Jian found in Wu Jianxiong's house, as long as the inspection results come out, it can prove whether my guess is correct.
...
However, Chen Yan understood.
Even if they figured out what caused the four people to spontaneously combust, it would only solve half of the puzzle.
The key is, who is the other party.
Why do you want to do this.
Since the murderer planned so carefully and went through all kinds of troubles, he definitely did not kill for no reason.
There must be a reason behind it.
It is of course important to figure out the method of killing. Chen Yan can arrange for people to start looking for the murderer from the aspects of deflagration materials and high-voltage electrical devices.
However, the motive for killing is more important.
There is no difference between spontaneous combustion and stabbing to death with a knife.
They are all murderers.
It's just that the method is secretive and weird.
The key is to smooth out the entire vein of hair.
And why killing is the first step.
It is also the most important step!
While everyone was waiting for the results of the autopsy and the test results of Wu Jianxiong's shoes and umbrella.
Other news came one after another.
The first is the clues of the new umbrella and shoes used by Song Pengcheng.
A group of personnel arranged by Lanfeng is responsible for relevant clues and visits.
The umbrella Song Pengcheng used came to find out, it was bought cooking oil as a gift.
Cooking oil?
Chen Yan was slightly taken aback: Basan brand cooking oil?
The detective who reported the report looked surprised: Uh...report to Team Chen, it is indeed 83 brand cooking oil.
really.
Go on.
According to Song Pengcheng's wife's dictation, Song Pengcheng bought cooking oil at the door of his house when he was off work about half a month ago.
The oil seller sent an umbrella.
That's the umbrella Song Pengcheng used when he spontaneously ignited.
Where are the shoes?
This also has a result...
The detective in charge called up a surveillance video.
It's at the gate of Song Pengcheng's house.
Moreover, it happened to be the video of Song Pengcheng repairing shoes.
This is a video from 11 days ago.
A itinerant shoe repairer, nailing Song Pengcheng's shoe spikes.
Cobbler!
A familiar figure appeared in front of everyone.
However, the shoe repairman in the video is still facing the camera.
He wears a sun hat on his head, and gloves on his working hands.
It's still him!
Zhang Yaoming looked at the familiar figure in the video with a serious expression on his face.
Team Chen, this person... Now it seems that he is very suspected of being a murderer.
Even if it is not the direct perpetrator, it must be a person related to the case.
Chen Yan nodded.
If there are too many coincidences, it must not be a coincidence.
This cobbler is currently the only person discovered by the special case team and had contact with several of the deceased.
Although, Chen Yan and the others have no video evidence that Li Wei, Cheng Pingping, and Wu Jianguo directly contacted this person.
However, based on the inferences from the shoe repair shop around the three people's home, it is possible to confirm the contact logic.
After all, all three repaired shoes, but none of them were in a shoe repair shop, and there happened to be such a shoe repairer nearby.
Using the method of elimination, we know that the shoes must have been repaired by this person.
Is there anything else?
The detective shook his head: Song Pengcheng hasn't found it yet.
We visited Song Pengcheng's neighbors, colleagues, and some relatives.
Everyone reflects that Song Pengcheng is humble and courteous. He is very popular in the unit and is very appreciated by the leaders. This time he is sent to Feng County to increase his resume and prepare to be promoted to the deputy chief physician of the department.
The high-rise residence where his family lives is relatively unfamiliar to the neighbors. However, according to the neighbors' reactions, Song Pengcheng always nodded and greeted each other when they met. I never heard of any conflicts with anyone.
At present, there is only so much information about Song Pengcheng.
The shoe repairer once again came into the sight of the task force.
However, at this point, Wang Xiurui is already trying his best to track down the trail of the shoe repairer.
There is no result feedback yet.
Captain Lan, how is the tracking of cooking oil going?
Edible oil has already appeared in Chen Yan's sight twice.
The first time, Li Wei was at the funeral home, and he brought cooking oil and an umbrella from the courier brother.
But this time, Song Pengcheng's exposure to umbrellas was related to cooking oil.
In fact, this should be a psychological strategy of the murderer.
His fundamental purpose is to get the victim to get the umbrella.
However, if you send an umbrella directly, it is easy to cause unnecessary suspicion.
Buying edible oil and sending an umbrella is different.
After spending money and taking advantage of the advantages, most people will choose.
But if you send an umbrella directly, people still suspect that it is fake.
Is there some kind of deception.
Send an umbrella directly, but it is easy to cause vigilance.
Team Chen, the cooking oil has just received news!
Katsa.
Lan Feng turned on the projection screen.
We have tracked down the little brother who delivered food to Li Wei at that time.
According to his description, he got the cooking oil from a grain and oil store at No. 36 Binjiang Road.
There is still an umbrella, but the person who placed the order did not contact him through the software, but directly asked him to take the order over the phone.
The reward is also in cash, one hundred yuan.
We have surveyed the vicinity of the grain and oil store and found no surveillance.
The phone number used by the other party is one-time, and it is only used once.
Even, we tracked down the 100 yuan banknotes collected by the takeaway boy at that time, and found no abnormal fingerprints on them.
The other party was very meticulous. All the fingerprints on the banknotes were wiped off, except for the fingerprints of the delivery guy.
Chen Yan was not surprised by this.
The murderer behind the scenes planned for a long time.
Even, it shouldn't be enough for one or two years.
The first is the cobbler.
This person is very familiar with Li Wei, Chen Pingping, Wu Jianguo and even Wu Jianxiong's residence.
Especially for the arrangement of monitoring, we can find the dead angle of monitoring every time.
Be aware that monitoring arrangements are not static.
However, the other party was able to evade all monitoring, which showed his familiarity.
You can see the timing of its planning.
Therefore, in terms of cooking oil, no clues were found, which was within Chen Yan's expectations.
At present, among all the clues for the breakthrough, there are still two that have not responded.
One is to report Li Wei's practice of living people, but Lan Feng's team has not released any information.
One is that in Wu Jianguo's office, the person who may have come into contact with his umbrella has not yet been found out.
Of these two points, Chen Yan paid the most attention to the second point.
Among the four umbrellas, Wu Jianguo's umbrella was the only one that he didn't get it himself.
It is issued by nursing homes.
In this way, it is impossible for the murderer to tamper with before the nursing home distributes umbrellas.
Unless he can accurately distribute the problematic umbrella to Wu Jianguo.
Of course, this possibility exists.
For example, if the director of Wu Jianguo's office is the murderer, then it is entirely possible.
The remaining possibility is that someone switched packages.
In Wu Jianguo's office, the unproblematic umbrellas were replaced with problematic umbrellas.
If this person can be found...
Perhaps, by that time, all mysteries will be revealed.
Now, it depends on the clues left by the other party, how long they can last!
Three hours later.
There is exciting news.
meeting room.
The situation analysis meeting was held again.
Song Pengcheng's autopsy report finally came out.
In the task force, everyone holds a copy of the report in their hands.
first line.
cause of death.
After being paralyzed by electric shock, burn to death!
Really electric shock?
The people in the special case team all have incredible expressions on their faces!
Li Wei, Chen Pingping, Wu Jianguo, and Song Pengcheng all died in the self-immolation fire on a rainy day without any struggle.
Team Chen... this, this, this...
When Zhang Yaoming got the incident report, he felt incredible.
Just three hours ago, although they had listened to Chen Yan's series of guesses, they were just guesses.
And now, living evidence is before the task force.
The internal detective responsible for the autopsy is Qin Yijun, a middle-aged woman.
Team Zhang, Team Chen, Qin Yijun personally explained the autopsy report to everyone: After the deceased participated in the autopsy, there were obvious traces of electric shock inside.
Katsa.
Screencast switch.
This picture is a cross-section of Song Pengcheng's remaining corpse. Look here...
In the cross-section picture, there is a radioactive net-like scorching mark.
This mark, extending from the deceased's two thighs and going upwards, caused great damage to the deceased's body.
The organs in the abdomen have been punctured, and there are traces of carbonization.
Although the upper body of the corpse has been scorched and disappeared, it can be inferred from the electric shock scars of this degree...
The deceased was paralyzed by the electric shock and unable to make any movements at the moment before spontaneous combustion.
In other words, the dead can only watch themselves burn, but cannot call for help or put out the fire
Qin Yijun's explanation made everyone fall into deep thought.
Spontaneous combustion, now it seems, should be a cover-up, or a ritual.
Captain Chen...you are so awesome!
Lan Feng on the side stood up at this moment, and looked at Chen Yan with a shocked expression.
There are few people who admire Lanfeng.
His temper is well known in the entire Dan City detective team.
Just recognize people with strong handling ability.
In itself, Lan Feng is the most capable of handling crimes in the Dan City Criminal Police Team.
In recent years, many eucalyptus have also been cracked.
However, because of his bad temper, he couldn't get along with his superiors, so he was always the leader of the case handling team of an ordinary detective team.
It wasn't until Zhang Yaoming came to Dan City Detective Team.
Lan Feng became the captain of the detective team.
However, even Zhang Yaoming, Lan Feng would ignore him.
Nothing else, he thinks that Zhang Yaoming's handling ability is not as good as him.
However, for Chen Yan, Lan Feng was really convinced.
It's only been a few days since I came to Dan City.
Just two days and one night.
The speed at which the case progressed surprised everyone.
Moreover, the work arranged is well-organized, and the analysis of clues and details is very good.
On my side, I just need to execute the order.
This makes Lanfeng very comfortable to work.
However, the case is complicated and confusing. It can be said that Lan Feng can't see any connection among these cases.
But what about now?
Umbrellas, shoes, cobblers...
Three important threads have been connected in series.
Chen Yan has even imitated the murderer's tactics.
And now, Song Pengcheng's autopsy report also verified Chen Yan's guess.
No wonder the higher ups sent people here.
This is ability.
Except for Lan Feng, everyone else looked at Chen Yan with surprise and admiration.
Captain Chen, what shall we do next?
At this moment, everyone saw the dawn of breaking through.
Chen Yan shook his head: The determination of the cause of death can be said to have solved part of the mystery.
Since Song Pengcheng was paralyzed by electric shock, the death process of Li Wei, Chen Pingping, and Wu Jianguo is also likely to be the same.
This explains why the four of them didn't roar loudly or fall to the ground to put out the fire when they spontaneously ignited.
Because these four people were already paralyzed by electric shocks when they spontaneously ignited.
Chen Yan did not arrange work, but looked at Qin Yijun: What is the metal powder in the report?
This has been tested, it's aluminum powder and iron powder...
Aluminum powder and iron powder?
Some metal debris was also found at the scene where Li Wei and others died.
These things, everyone thought they were left over after the umbrella bones were burned.
But why is it aluminum powder and iron powder?
When the metal encounters high temperature and melts, when it encounters condensation and condenses, it should form debris or broken beads...
It should not be powdery.
When everyone was wondering, good news came from the laboratory.
Team Chen, Team Zhang, the disassembly of shoes and umbrellas has been completed, and a major discovery has been made!
The detective in charge of this work looked excited.
We found out why the dead can spontaneously combust!
On the conference table were disassembled umbrellas and shoes.
Team Chen, there is indeed a problem with this shoe.
It turned out that a special device was implanted inside the heel of this shoe.
It is a self-made discharge device.
Although the electricity generated by this thing is relatively small, the instantaneous voltage of this device can be as high as 10,000 volts!
Once the voltage of 10,000 volts is touched by the human body, it can instantly paralyze and stiffen.
High-voltage electric shock, above 36 volts, is a dangerous voltage.
Household 220-volt voltage, once an electric shock, cannot be disconnected for a short time, it will be life-threatening.
And the voltage of 10,000 volts, if it lasts longer, people can fly to ashes and die directly.
The upper frame of the umbrella is specially made.
The stuff inside is aluminum powder and some catalytic substances.
Catalyst?
Chen Yan stepped forward to check, frowning slightly: Could it be... thermite reaction?
When the detective in charge of the test mentioned the catalytic substance, Chen Yan immediately remembered what he had learned in high school, the redox of iron.
Although the specific equations and chemical reactions have been forgotten, Chen Yan still has an impression of this term.
No wonder, there were iron powder and aluminum powder on Song Pengcheng's body.
It turned out to be the case.
Team Chen, you are right, it is the thermite reaction.
The killer was so powerful that he stored thermite in the umbrella frame and had electronics built in.
We have tested that there is a sensing system between this device and the high voltage device in the shoe.
Once rain is detected, and the umbrella and shoes are within a certain distance, it will trigger thermite deflagration!
The temperature at which thermite burns can reach more than 3,000 degrees Celsius. At this temperature, the human body is carbonized, which only takes a few minutes.
Moreover, this chemical reaction also has a self-extending effect, that is, once it occurs, the heat released by the chemical reaction itself can continue the reaction until the end of the reaction.
As for rainwater, it is impossible to terminate this high-heat chemical reaction during this process, and it will even be decomposed into hydrogen and oxygen by high temperature, which will eventually support combustion...
The detective in charge of the test gave a chemistry lesson to the special case team.
Although many people could not understand, but in the end, everyone understood.
The murderer used the high-voltage device in the shoe to let the victim die first, so that he could not struggle or call for help.
Afterwards, the thermite in the umbrella exploded simultaneously, and a high temperature of 3,000 degrees Celsius erupted in an instant, burning the corpse to ashes.
Thus, this kind of effect that seems to be spontaneous combustion of the human body is formed.
Sure enough, there is no weirdness in the world, it's just that there is not enough knowledge and it is unexpected.
Although Chen Yan had guessed the opponent's method, he still didn't know the specific method.
High voltage electricity is physics, thermite reaction is chemistry...
Chen Yan was not very good at these two points.
Captain Chen, what should we do next?
Chen Yan looked at Zhang Yaoming who was asking the question: Wait!
All we can do now is wait.
After Lanfeng's team finishes checking two things, I need to confirm something...
...
7 a.m. on the 28th.
The news came.
Last night, after the meeting, Lan Feng went directly to the scene.
I didn't close my eyes all night.
Interrogation outside.
The office director of Sunset Red Nursing Home, Li Fengtian, was being questioned by Lan Feng.
Other than him, I'm the only one who owns the office of Dean Wu.
I go to the nursing home early every morning to clean the office for Dean Wu.
You clean it yourself?
Yeah, I clean it myself...
Oh, by the way, some time ago, besides me, there was another young man who was a volunteer in our nursing home. He also went to the nursing home earlier and helped me with some work.
Volunteer, clean the dean's office?
Chen Yan monitored the microphone in the room: Lan Feng, ask him about the situation of this volunteer.
Monitoring room.
What's the volunteer's name, how old is it, and is he still in your nursing home?
Li Fengtian nodded: This volunteer is called Dong Lingyun, in his 20s...
It's always been our nursing home. However, this young man comes three times a week. He comes on Monday, Wednesday and Friday, and he is usually away.
Dong Lingyun?
When Lan Feng heard Li Fengtian say this name, his heart suddenly moved.
Instructing colleagues around him to continue, Lan Feng left first.
The monitoring room next door.
Lan Feng looked solemn: Captain Chen, I have an unexpected discovery.
...
Projection is turned on.
This man, Dong Dejun, is Li Wei's colleague and also works in the funeral home.
You asked me to follow up. Regarding the report on Li Wei's practice of living people, the progress has been slow in the past two days.
Dong Dejun spoke cryptically about what happened back then, and he has not been very cooperative with our work.
So, we focused on Dong Dejun's personal information and conducted an investigation...
As a result, although this Dong Dejun is 54 years old, he is not married, but adopted a child ten years ago,
Adopted a child?
Chen Yan looked at Lan Feng: This child...is the volunteer Li Fengtian mentioned...Dong Lingyun?
Lan Feng nodded: Yes, that child is called Dong Lingyun, but I'm not sure if it's the Dong Lingyun that Li Fengtian was talking about.
If you're not sure, check it out!
Thorough investigation.
Summon Dong Dejun and Dong Lingyun immediately.
Chen Yan finally made a decision: At the same time, find out the details of Dong Dejun's adoption of Dong Lingyun.
Who is Dong Lingyun's biological father, why he was adopted back then, where he was these years, what job he does, I want all the information about Dong Lingyun.
Lan Feng nodded heavily.
This information is very critical.
There was no connection between Li Wei, Cheng Pingping, and Wu Jianguo.
However, they all died.
Why did the murderer kill three unrelated people?
And it's been carefully planned for so long.
Therefore, there must be a reason behind it that no one knows.
But now, Dong Lingyun was the only one who might link Wu Jianguo and Li Wei together.
With a goal, it is very quick to check these basic information.
Dong Lingyun, formerly known as Wang Lingyun.
Ten years ago, he was adopted by Dong Dejun.
At that time, Dong Lingyun was 14 years old.
As for Dong Lingyun's parents, they died in a car accident when Dong Lingyun was 7 years old.
Later, Dong Lingyun lived with his grandfather Wang Side.
It's just that if the sky is unpredictable, people will have misfortunes and blessings.
When Dong Lingyun was 13 years old, Wang Side suffered from cerebral palsy and could not take care of himself.
And because Dong Lingyun has to go to school, he can't take care of the old man all the time.
Fortunately, Wang Side had some savings, and Dong Lingyun's biological parents had some compensation after the car accident. Dong Lingyun sent the old man to a nursing home.
However, a year later, the old man was admitted to the hospital because of burns, and finally died.
...
trial room.
Chen Yan is personally interrogating Dong Dejun.
Dong Dejun, can you tell me about why you reported Li Weiwei for practicing living people?
What happened back then was a misunderstanding. I was already punished back then, and those things have long been forgotten...
forget?
Have you really forgotten that every time you drink, you will yell that you have been wronged?
However, up to now, it is no longer a question of Dong Dejun talking or not, or whether he cooperates or not.
The events of the old man Wang Side laid the groundwork for everything today.
Dong Dejun, since we called you here, we know what happened back then.
Ten years ago, you adopted Dong Lingyun.
As for Dong Lingyun's grandfather, Wang Side, you should know better than anyone else, right?
At this moment, Dong Dejun suddenly raised his head, his face was ashen.
Chen Yan saw everything in his eyes without pausing: Ten years ago, Wang Side suffered from cerebral palsy and was sent to Xiyanghong Nursing Home by 13-year-old Dong Lingyun.
And the director of this nursing home is called Wu Jianguo, is this name familiar to you?
Wang Side was in a nursing home back then, and due to poor care by the nursing staff, the electric blanket on the bed caught fire and caused extensive burns.
Then, he was sent to the burn department of the First Hospital by the nursing home, and died not long after.
I checked the records from that year. In the burn department, the nurse in charge of nursing Wang Side was named Chen Pingping...
You are familiar with this name.
That night, Wang Side's body was sent to the funeral home.
You were on duty with Li Wei that day. According to the procedure, you were responsible for checking Wang Side's death certificate and changing clothes for the old man.
However, when Li Wei was drinking at the time, he directly pushed the old man into the cremator...
Dong Dejun, are I right?
Dong Dejun let out a long breath at this moment.
What happened back then, I am very sure that Wang Side is really not dead!
Dong Dejun explained everything.
Back then, Chen Pingping went home temporarily to pick up her son to the No. 1 Hospital because her son had a fever.
But, she forgot to change Wang Side's oxygen cylinder.
When she came back, Wang Side should have passed out due to lack of oxygen.
As for Chen Pingping, she was afraid of taking responsibility at the time, so she didn't check carefully, and directly reported Wang Side's death...
And then the body was sent to the funeral home.
However, when I checked, the old man had already recovered a bit, and he could move his fingers...
He definitely didn't die, but Li Wei didn't listen. He drank too much and pushed him directly into the cremator...
...
What happened back then, according to Dong Dejun's account, although he reported it, he had already been cremated and there was no evidence.
Where is the death certificate? Just based on Dong Dejun's words, how could it be possible to judge that Li Weiwei was a living person?
What's more, it still involves the doctors, nurses, and people from the funeral home of the First Hospital.
So, this matter is over.
However, everyone thought it was impossible, but Dong Lingyun believed Dong Dejun's words.
14-year-old Dong Lingyun is already sensible.
Dong Lingyun, who was originally dependent on his grandfather and was reluctant to be separated, was obviously more willing to believe Dong Dejun's words.
What's more, in these years, whenever Dong Dejun was drunk, he would definitely talk about it.
It is conceivable that in Dong Lingyun's heart, he must have felt that the people from Xiyanghong Nursing Home, No. 1 Hospital, and funeral parlor killed his grandfather.
Moreover, it is an indisputable fact that at the Sunset Red Nursing Home, Wang Side was burned due to a mistake.
However, the nurse at that time died of a heart attack 7 years ago.
It was impossible for Dong Lingyun to take revenge.
However, Wu Jianguo is still alive.
As the dean of the Sunset Red Nursing Home, Dong Lingyun naturally set his sights on him for revenge.
Another interrogation room.
Dong Lingyun was very calm when facing Chen Yan.
Since you can find me, you should already know what happened back then?
Chen Yan nodded.
Not only that, Lan Feng immediately organized detectives to search the residences of Dong Dejun and Dong Lingyun.
When Chen Yan saw what Lan Feng brought back, he was stunned.
ten years!
A whole decade.
Dong Lingyun has been planning all this since he was adopted by Dong Dejun.
When he was in school, Dong Lingyun would stop by the gates of Li Wei, Chen Pingping or Wu Jian after school.
Later, when Dong Lingyun grew up, he began to plan this operation.
The bicycle for shoe repair, the material for making thermite, and the high-voltage discharge device were all found in Dong Lingyun's house.
Chen Yan nodded.
With these, Dong Lingyun was actually able to be convicted.
However, Chen Yan still wanted to see this person.
does it worth?
Ha ha.
Ha ha!
Dong Lingyun laughed loudly: Do you think it's worth it?
The expression on his face is like a ghost!
My grandpa, there was still hope!
But, he was burned alive!
You said, should they die?
So, you want to end their lives by spontaneous combustion?
That's right, if it wasn't for the success of the experiment, I would have killed them a long time ago...
I want them to taste it too. What does it feel like to be burned to death?
Chen Yan left.
He didn't ask Dong Lingyun what to do if Dong Dejun was wrong.
What if Wang Side was really dead back then, and everything was caused by Dong Dejun's misjudgment.
Because there is no need.
It is true that the nursing home managed by Wu Jianguo has problems.
It is also true that Chen Pingping did not take good care of her back then, which led to the lack of oxygen for the elderly.
Li Wei...it was true that he went to work after drinking that day.
Just like back then, everyone thought Wang Side was dead.
However, Dong Dejun didn't believe it.
Dong Lingyun didn't believe it either.
This is enough.
Behind any death of hatred, hidden is a tragedy.
In an avalanche, no snowflake is innocent.
...
－－－－－Off Topic－－－－－
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