Although it is expected that innocent citizens will be sacrificed if the murderer commits the crime again, psychologists are not immortals, and what they can do is far less exciting than what is staged on TV.

Whatever you want. Wen Mo's train has just departed from City B, and the arson demon in City H has acted again!

It has only been half a month since the last arson, and the sound of fire trucks roaring past in H City has sounded again!

The fire started in the Cultural Park in Baohe District.

This cultural park occupies a small area, the scenery is average, and visitors mainly come to its underground exhibition halls. The exhibition hall is full of folk changes and cultural history of H City over the past thousand years, and most parents like to bring their children here to learn some knowledge.

Today is Monday, the usual closing day of the Cultural Park. On this day, the cultural park is closed, the staff in the morning to inspect and sort out the collections in the museum, and in the afternoon to meet to arrange the week's work tasks, since the establishment of the cultural park, there are no exceptions.

Fortunately, because today is a closed day and it is almost time to get off work, most of the staff are concentrated in the office, and when the underground exhibition hall caught fire, there was no one inside.

The supporting facilities in the exhibition hall are very complete, after the indoor temperature rises abnormally, the fire alarm automatically sends out a warning, and the automatic sprinkler head all starts to work, but what people did not expect is that the water was poured down as scheduled, and the fire in the exhibition hall was not extinguished, but also increased, and it didn't take long for the underground exhibition hall to explode.

The staff of the cultural park have never experienced an exhibition hall fire, and they usually lack emergency response training in this area. After the fire broke out, Wang Lihai, the section chief in charge of the folk customs exhibition hall, and Chen Chuanliang, a staff member, entered the scene as soon as possible, trying to rescue some valuable exhibits that are sensitive to fireworks and moisture.

Their idea may have been simple: the fire alarm in the exhibition hall had gone off, the sprinklers had begun to spray water, and it was only a matter of time before the fire was extinguished, and when they opened the door of the exhibition hall, they did not find any open flames, but only felt that the heat in the room was raging, and there seemed to be a small fire in a corner near the window on the left, so they were not alert at all, but ran to the innermost part of the exhibition hall with some excitement to move the valuable exhibits.

The sudden explosion blew everyone present. Several staff members who were also about to go in and move the exhibits just now were half a beat slower than the previous two people. I was able to save my life.

The entire exhibition hall was already a sea of fire, and what scared the staff even more was that this fire did not seem to be afraid of water. They watched as the water from the sprinklers dripped onto the flames, but the fire had no sign of fear. Still wreaking havoc in the exhibition hall.

What the hell is going on??

Wait for firefighters to arrive. The fire is out of control. Instead of working, the sprinkler system had caused a second explosion not long ago, firefighters had to resort to the most conservative method of all - sand. to extinguish the fire.

Silica, the main component of sand, is chemically stable and does not react with many substances, making it a good fire extinguishing agent. The sprinkler head in the underground exhibition hall that has not been affected by the fire is still working, and in order to prevent another explosion, the staff of the cultural park found the fire water pipe and manually closed it to remove the sprinkler from working before the fire material was clarified.

Fire trucks continued to load sand from the sand field and fill the underground exhibition hall, and after six hours, half of the exhibition hall was buried by sand, and the open flames were finally extinguished when there was no burning left.

Only then were firefighters able to enter the scene and carry out the bodies of Wang and Chen. As for the cause of the fire, further investigation will not be possible until the sand in the underground exhibition hall has been cleared.

Wen Mo and Luo Qin got off the train and were directly pulled to the Cultural Park by their counterparts in H City. Although it was already dark, the fire site in the cultural park was brightly lit, and bags of sand were transported out again. The bodies of the two victims had already been carried back to the substation for autopsy, and Wen Mo only saw Mu Shudong, the stationmaster of the Cultural Park.

The chubby man in his forties kept wiping his forehead with a tissue and asked again and again, "How can this be?" How so? ”

"Hello, we're the police, can you let us see the surveillance video in the exhibition hall?" Wen Mo didn't have time to sympathize with this unlucky guy, there was such an important accident, not only killed two people, but also burned a lot of valuable exhibits, and his stationmaster position was probably over.

"This, this ......" The sweat on the east head of the mother tree flowed faster, and he squeaked for a long time before finally telling the truth.

Not to mention the underground exhibition hall, all the cameras in the cultural park are just decorations, they buy second-hand goods eliminated by others, and they have not passed electricity since the day they were placed.

In the face of the anger of several policemen, the stationmaster was also helpless: "Alas! Do you think I'm willing to do that? The money saved by buying these rags won't go into my pocket. I admit that I didn't do a good job, but what can I do? The cultural park is a public institution, there is no charge to visit here, there is no source of income, all our funds must be approved, the superior agrees, you have money. ”

"It's been seven or eight years since this underground exhibition hall was built, and all the equipment was complete at that time, and after that, there was no financial allocation. The monitoring equipment has a service life, what should I do if it breaks? It costs 180 yuan to change one. The exhibits in the exhibition hall cannot be hot or cold, dry or wet, and just protecting them will use up all our budgets, and the rest can only be passed by and passed. We always thought that although the things on display were very historical, the real collection value was not much, and no one would bother to steal them, so the money from monitoring this piece was misappropriated elsewhere. Mu Shudong shook his head, staring helplessly at the messy underground exhibition hall, and took out a tissue to wipe his sweaty forehead again.

It was not until the afternoon of the next day that the cause of the fire was clarified: a large amount of thermite was found in the corner of the window on the left side of the underground exhibition hall, and after the sand used to extinguish the fire was cleared, even if there was no open flame, the core of the thermite was still in progress because the temperature had not dropped. Firefighters had to take a few photos before filling the sand again.

To be sure, this was a case of arson. A pink mixture of aluminium powder and ferric oxide powder was used, because on the left side of the basement gallery by the window was the tillage booth, and the thermite was similar in color to the earth, and no one noticed anything wrong with it until it reacted.

The ignition agent used in the reaction was magnesium strips, because firefighters found many magnesium strips outside the windowsill that had been ignited to produce magnesium oxide white fixations. It is preliminarily estimated that someone secretly placed thermite in the underground exhibition hall in advance, and took advantage of the fact that the museum was closed today when there were few people. Come back and light the magnesium bars. Start a fire.

Hearing the three words thermite, Wen Mo's brows furrowed involuntarily. Thermite is a thing that reacts quite violently and releases a lot of heat. The core temperature can reach more than 2400 degrees Celsius. Melt the generated iron into molten iron. It is widely used in industry.

But it's also a treasure for arsonists. Because the thermite ignite is simple, it only needs to ignite the same magnesium strip inserted in the thermite from a distance, and it should be carried out once it is generated. If you want it to stop spontaneously, you can't finish it without consuming either aluminum or ferric oxide.

Thermite does not require oxygen to react, so conventional fire extinguishers such as foam fire extinguishers are ineffective, and the most commonly used fire extinguishing method, water spraying, is counterproductive. Because of the large amount of exothermic reaction, the generated iron and water molecules can react again to generate hydrogen, which is a flammable and explosive gas.

No wonder the two staff members rushed in to rescue the exhibits at the beginning, when the thermite first began to react, it would only release a large amount of heat, and there was no open flame, they must have thought that the fire was small and did not take it to heart. When the concentration of hydrogen in the air reaches a certain standard, the explosion is inevitable, and the hydrogen is colorless and odorless.

So from the very beginning, they didn't have a chance at all.

But is this case really committed by the murderers of the two arson cases of Dingxin Asbestos Factory and Jiangbei Small Commodity Wholesale Market?

On the whole, these three cases have something in common: they all deliberately chose a place where there were fewer people to commit the crime - the underground exhibition hall of the Cultural Park is closed on Mondays, and I believe that people who have been in H City for a period of time can know it as long as they want to; use of accelerants; Subjective intention to cause casualties - due to the responsibility of the work, when it is determined that the danger factor is not high, the entry of the staff into the fire scene is completely predictable to the murderer; In a relatively short period of time, the likelihood of two arsonists appearing at the same time in the same city is very small.

But why does Wen Mo feel that something is wrong?

Although the perpetrators used accelerants in all three arson cases, there is a difference between accelerants and accelerants.

First of all, it is basically common knowledge that gasoline can be burned, and everyone knows it. And gasoline is quite easy to obtain, just take an iron bucket and spend some money, there are so many gas stations in the city, how can you not buy a barrel of gasoline? Supervision can be said to be almost non-existent, and afterwards the police want to start from the source of gasoline to find the murderer, where is the needle in a haystack, and the air is almost the same as PM2.5.

But thermite is different, let's not talk about finding a few people on the street and asking them if they know what thermite is, we only talk about raw materials. The two raw materials for the formation of thermite must be mixed in a certain proportion, otherwise the reaction is not sufficient, it is likely to stop prematurely, and the hydrogen concentration in the air is not up to standard, which cannot meet the destructive effect of explosion and fire.

Gasoline, very amateurish, thermite, quite professional.

In the first two cases, the murderer showed a subjective intention to kill, the first case, Uncle Yuan, and then deliberately poured gasoline on the fire to kill people, and the second case, knocked two old people unconscious, poured gasoline on people, set fires, and closed the iron door. The murderer's mentality is quite bad, and it can basically be said that arson is only a means for him to kill people, and he does not show an obsession with fire.

But this one, although the casualties were expected by the murderer, he did not directly inflict harm, and he left more of his work to his work: the pile of thermite to perform.

In any case, now is not the time to draw conclusions.

She still needs more details, more evidence, and I hope those two videos that she has never seen can help her solve the doubts in her heart.

Meeting room of H Municipal Public Security Bureau.

It's already half past ten on Tuesday night, the conference room is brightly lit, and just now, the third arson case was also uploaded to the Internet by the murderer! (To be continued......)

PS: Thank you Manman for the two tickets~~~

I was so impressed~~~