I am a super cop

Chapter 566 The Chemical Reaction in the Secret Room

The scene suddenly fell silent. Everyone looked at each other and began to think inexplicably.

Indeed, Gu Chen's sudden question made everyone feel that the fire and various suspicious points at the scene made this small secret room look extremely strange.

Regarding the questions Gu Chen mentioned, no one could give a definite answer, not even the landlord and the driver could give a sufficient reason.

Lu Weiwei carefully observed the changes in the driver's expression, and then asked him calmly: "The layout of your room makes people feel as if they knew in advance that this is a flammable room."

"And there is not enough cat food, and there are goldfish as companions. No matter how you look at it, it is hard to figure out."

"Combined with the inexplicable start of the fire, it makes me feel that this fire seems to have been premeditated."

"This...you can't talk nonsense about this." The driver stared blankly, and quickly retorted: "Anyway, I don't know what's going on at all."

"That is to say, all this is the result of your wife's arrangement?" Gu Chen directly extended it according to the driver's master's words.

Because according to Gu Chen's understanding of the scene environment, it seems that this room and this pet cat are more like a bureau.

As many suspects could confirm, the house seemed to be preparing for a fire.

Especially this hungry pet cat, which was only skin and bone, brought Gu Chen's doubts about this room to a climax.

The driver master was powerless to refute at this moment, and only nodded his head after hesitating for a few seconds.

Gu Chen then walked to a burnt sofa, looked at all kinds of burnt wood and sponges, and the burnt spring, wrapped a handful of powder in a paper towel, held it in his hand, and handed it to everyone.

"Look, everyone, what is this?"

"The burnt powder?" Xu Zhenggang froze for a moment.

"No, it's like lime powder." The fire chief seemed to recognize the substance.

After Lu Weiwei and Yuan Shasha looked at each other, they both turned their attention to the driver.

The master driver was not aware of it, and after looking down carefully, he suddenly asked Gu Chen in an incomprehensible manner: "Comrade policeman, don't be a fool."

"What exactly is this thing? I really don't know. Now that you say it like this, it makes me even more confused."

"You don't need to be confused." Gu Chen held the powdered paper in front of his eyes, and said calmly, "What the firefighter comrade said just now is absolutely right, this is lime powder, and it is lime powder that has undergone a chemical reaction with water. "

"Lime?" Yuan Shasha was the first to ask.

Lu Weiwei was also dazed for a moment, and immediately answered: "Quicklime and water, these two things seem to be discussed together as soon as they are mentioned."

Gu Chen nodded slightly and asked, "But have you ever thought about why this kind of lime powder is in the room? What does it have to do with the fire?"

"Could it be the chemical reaction between quicklime and water that caused the fire?" The firefighter leader suddenly frowned, feeling a little interesting.

If it is said that Gu Chen's guidance earlier prevented everyone from grasping the key point of the cause of the fire.

So now, it seems that Gu Chen has given a substance that is quite close to the truth.

Xu Zhenggang frowned, looked at Gu Chen and asked, "I said Gu Chen, there is some lime powder in this room for no reason, did someone put it here on purpose?"

"Does it need to be said?" Gu Chen glanced at the driver, then turned his attention to the security guard and Lu Weiwei of Kaitian Property Management, and said calmly:

"Just now, my colleague Xiao Yuan has investigated and monitored with the property manager, and confirmed that no strangers have sneaked into this villa in the past few days.

Then there is only one possibility, the lime powder was placed here on purpose by the driver's wife. "

"What... what? My wife let it go?" The driver was suddenly taken aback, and didn't realize it for a long time.

"Yes!" Gu Chen looked at the driver, his expression obviously not as confused as before.

Being able to find this piece of evidence, it can be said that Gu Chen probably knows the answer in his heart.

"Junior Brother Gu." Thinking of this, Lu Weiwei felt that it seemed a little simple, and said involuntarily, "Then according to your point of view, with this thing, the source of the fire can be found, and that is caused by adding quicklime to water, right?"

"Quicklime and water? Is it that powerful?" Hearing Lu Weiwei's words, the property security guard was also full of doubts: "Why do I feel that it only releases a lot of heat, but is it possible to ignite objects?

"Of course it is possible." Gu Chen also smiled lightly: "It mainly depends on whether the temperature it generates can reach the ignition point of the object. If it can, it can ignite the object."

The scene suddenly fell silent, and everyone turned their attention to the lime residue beside the sofa.

Yuan Shasha and the firefighters squatted down to carefully check the amount of lime powder in the room.

"Senior Brother Gu." Yuan Shasha looked back at Gu Chen, and said, "Based on the amount at the scene, can it really ignite objects?"

Gu Chen nodded, and said, "That's right, because the main component of quicklime is calcium oxide, its shape is white solid, and it's fire-resistant."

"But while reacting with water, it can give off a lot of heat, or absorb moisture from humid air."

"And after adding quicklime to water, you will see that the whole water boils immediately, and a lot of steam comes out, which generates a lot of heat and the temperature will be very high."

Seeing everyone's eyes focused on him, Gu Chen said again: "Do you know? In fact, many people use the process of adding water to quicklime to generate a lot of heat, put eggs in it, and boil an egg with lime. .”

"But usually, by the time the egg is taken out, the whole egg is already cooked through."

"And this phenomenon is easy to see in rural houses or construction sites."

"This heating method is more environmentally friendly, because in the whole process, except for heat release, no other harmful substances will be produced, and energy is not wasted."

The fire brigade leader nodded and said, "It makes sense to hear what you said. I've seen it before. Using the process of adding water to quicklime to generate a lot of heat, and putting eggs in it, the temperature is indeed quite high."

Hearing what the fire brigade leader said, Gu Chen suddenly squatted down, picked up a burnt wooden stick from the ground, and walked to the wall.

Using the wall as a blackboard, Gu Chen wrote the chemical formula "CaO+H2O=Ca(OH)2" for the reaction between quicklime and water on the wall.

Then he turned around and said to everyone: "Actually, there are two reactions. One is to pour water into quicklime powder, and the other is to put quicklime into water."

"Hehe." The property manager couldn't help laughing dryly, and it was only when he saw people staring at him strangely that he smiled lightly and said, "I'm talking about comrade police, isn't... isn't this the reaction of water and quicklime? Isn't it the same whoever joins?"

"If you think it's the same, then you're wrong." Gu Chen also looked at the formula on the wall, and said lightly: "Just like the first reaction phenomenon, the water slowly boils and evaporates, and it will turn gray and cloudy in the middle. All the water is fully reacted."

"Then... what about the second phenomenon?" Xu Zhenggang, who was holding his chin with his hands on his chest, suddenly felt that he was a scumbag.

"The second..." Gu Chen glanced at everyone, and then said: "The second phenomenon is that the lime gradually dissolves and generates heat, and only then will all the quicklime fully react."

Picking up the blackened wooden stick in his hand, Gu Chen drew "Ca(OH)2" in a circle, and then said: "This is the chemical element after the reaction. It is a strong electrolyte, but its solubility is not very good. It should be regarded as Slightly soluble, there will be a difference in the above phenomena.”

"If the two are strictly equivalent and fully reacted at the same time, the phenomenon is close to the first case."

"And the reactive substances in my hand are more like pouring water into quicklime."

"To achieve the ignition point of an object, it mainly depends on the temperature it generates. If possible, it can ignite the object."

"Wait a minute." The fire brigade leader suddenly interrupted Gu Chen's speech. He looked at the blackened walls around him, looked around for a week and said, "So, this is the real cause of the fire. It's because the water has introduced quicklime into it. Here, a lot of temperature is generated, and heat is released."

"And when all this reaches the ignition point of the object, it ignites the surrounding combustibles, and then starts this fire."

After integrating these things, the firefighter leader looked at Gu Chen and said with a smile: "Brother policeman, I didn't expect you to know so much, but the problem is, if the quicklime is prepared by the house owner's wife. "

"But why did the fire start today? You have to know that his wife and children have been away from home for a week, and it is completely impossible to complete such an operation."

Gu Chen nodded slightly, then looked at the dead cat's body and said, "It is true that the driver's family has been away for a week, but I didn't say that this chemical reaction was done by his family!"

"It wasn't his family who did it, could it be..." Lu Weiwei looked at the dead cat's body and then asked in doubt: "Could it be that cat did it?"

"That's right." Gu Chen answered directly, then pointed to the dead cat's body, and said, "This fire was indeed caused by this cat."

"But it was not voluntary, but after being manipulated by someone, and after producing evidence that the controller was not at the scene, it somehow became a scapegoat, because all this was arranged by the driver's wife."

"My...my wife?" The driver shook his head in fright, and quickly retorted: "How can you say that? What does this have to do with my wife?"

"And you said that the cat caused the fire. How did it do it?"

"You want to know?" Gu Chen asked.

The master driver nodded fiercely: "I really want to know, at least I have to figure out why my house is suddenly on fire, at least how did the water and quicklime react suddenly?"

"It's because of the cat food." Gu Chen pointed at the dead cat's body with jio, and said, "Because when your wife prepared the cat food, she didn't prepare enough for ten days, but it was probably only three or four days."

"So the kitten was hungry after eating all the cat food, so it set its sights on the goldfish."

"That's right." Lu Weiwei picked up the fragment of the fish tank on the ground, and then said in surprise, "There may have been goldfish in it, but now the goldfish is gone, obviously it was eaten by the cat."

"However, if there is no source of fire in the room, no sign of thermoelectricity, the gas switch is closed, and there is no timed ignition device, then the fire can only be started by this cat."

Looking at the burned bookshelf beside her, Lu Weiwei smiled and said, "If I'm not mistaken, this goldfish bowl must have been placed on top of the bookshelf before."

"When the kitten finished eating the small amount of food it was given, it was so hungry that it would grab the fish tank on the bookshelf."

When Lu Weiwei said this, Yuan Shasha quickly answered, "So, the final result is that the fish tank fell down and poured on the quicklime."

"The quicklime undergoes a chemical reaction with water and turns into slaked lime. The heat released during this process ignites the books on the bookshelf and the surrounding combustibles."

"That's right." Gu Chen snapped his fingers, and smiled happily: "So the result is that although the kitty ate the goldfish in the fish tank, it also poured the water in the fish tank on the quicklime, so that's why started the fire."

"And this room is just an airtight existence. After the kitten ate the goldfish, although it was full, it couldn't escape the room, so it suffocated to death, and then its hair was scorched by the fire. become what it is now.”

Looking at the dead cat's body under his feet, Gu Chen said again: "If I'm not wrong, the goldfish that was eaten into the cat's stomach should not have been digested. If you want to prove whether what I said is true, you just need to dig it open. A cat's belly can tell the truth."

The fire brigade leader at the side glanced at Gu Chen, immediately took out a multifunctional saber from his body, then squatted down, and sliced ​​open the scorched cat's belly with the blade.

Not long after, the firefighter leader found the remains of a goldfish in the cat's stomach.

"Hehe." The firefighter leader turned his head to look at Gu Chen, and said with a calm smile, "Brother policeman, you are right, these goldfish were just eaten into the cat's stomach and have not been digested yet. .”

"My God." Xu Zhenggang, who was on the side, also saw Gu Chen restore everything that happened in the room based on the small amount of evidence at the scene, and he was also stunned for a while.

The way he looks at Gu Chen has changed now, and he can't help but say: "I said Gu Chen, you can actually use this thing to deduce such an accurate result, you...what the hell is in your head?" ghost?"

Gu Chen also smiled lightly: "Usually use your brain more. When you stay in this suspicious environment for a long time, you will also have this keen observation ability. It's just a professional habit."

"Brother policeman." At this moment, the fire brigade leader who put away the multifunctional saber couldn't help giving a thumbs up and said:

"You have given me a lot of insight today, and you can reason it out like this. It feels like everything here can't be hidden from your eyes. You are really amazing."

"Haha." Hearing the way the firefighter leader praised Gu Chen, Lu Weiwei couldn't help being overjoyed, and said angrily:

"It's a bit interesting for you to say this, so I don't want to ask about it. My junior brother Gu is in the Furong branch of Jiangnan City. Is there anyone who doesn't say that he is good? This is also a big fuss?"

"Is that because I'm ignorant?" The fire brigade leader also smiled.

But while everyone was silently uncovering the mystery of the fire, Gu Chen suddenly turned his attention to the driver, stepped forward and asked him:
"The facts are already clear. If your wife was the last to leave the villa, then it was your wife who set the fire."

Looking up and down at the driver, Gu Chen was suspicious again: "Could it be that...you and your wife conspired to start this fire?"

"Absolutely... Absolutely not." Also startled by Gu Chen's words, the driver was stunned, and quickly defended himself: "I don't even know what my wife is doing at home?"

"You have to know, this is my home, why should I burn down my house? Am I sick?"

"Gu Chen." Xu Zhenggang looked at him, and reminded softly: "What he said is right, who is so self-willed and has nothing to do with burning his own house for fun?"

Gu Chen hesitated for a few seconds, and quickly said to the driver: "Well, you can call now and tell your wife to go home quickly, and go directly to the Furong branch after returning."

"And now you must go to the Furong branch with us to explain the situation here clearly. We need to compile a detailed investigation report."

"But I still have to run Didi tonight," said the driver.

Lu Weiwei also said unhappily: "I said you are serious, the house was burned, and you still ran Didi? This matter is very serious, do you know?"

"Fortunately, it only burned your family. If it endangers other residents, how many lives will be lost?"

"Deliberately setting fires and endangering the safety of other people's lives and property is a felony."

Hearing Lu Weiwei's scolding, the driver didn't dare to speak anymore, and he was also dizzy at the moment, not knowing how to solve the current problem for a long time.

Gu Chen glanced at the property manager beside him, and said, "Now, you are responsible for sealing off the scene and not letting anyone enter the room."

"Don't worry about it." The property manager also patted his chest and promised: "I'll go get some things later and seal this door."

"Very good." Gu Chen nodded, then looked at the driver and said, "Master, then please take Didi again and come with us to the branch office."

……

……

10:30pm.

Furong Sub-bureau, Interrogation Room No. [-].

After one night of sorting out, Gu Chen basically recorded the situation of the driver master completely.

The driver's original name was Xu Youcai, which was originally a wealthy name, but now it seems that not only his career was frustrated, but even his only house was completely destroyed by this ruthless fire.

Throughout the night, Xu Youcai confessed honestly, explaining everything he knew.

Prove that I really don't know what happened to my wife to intentionally create this arson incident.

After receiving the summons from the police, Xu Youcai's wife also traveled all day and night, and finally took a taxi to the Furong branch at four o'clock in the morning.

After questioning all the way, the middle-aged woman wearing a white down jacket and slightly haggard makeup trotted all the way to the third criminal investigation team.

At this moment, there were only three folding beds open in the office.

Gu Chen, Lu Weiwei and Yuan Shasha were lying there on their backs, squinting their eyes slightly.

It was also after hearing "Tuk Tuk Tuk" knocking on the door that Gu Chen slowly opened his eyes and looked up at the person coming at the door.

"You are?" Gu Chen stood up and asked her.

"I am Xu Youcai's lover, and you told him to call me." The middle-aged woman stepped forward and said.

"Oh, sit down first." Gu Chen sat up, and then kicked Lu Weiwei and Yuan Shasha beside him, and they stood up stubbornly.

Afterwards, the middle-aged woman sat blankly on Officer Wang's seat, while Lu Weiwei and Yuan Shasha stood aside alone.

After Gu Chen adjusted the camera, he also moved the stool in front of the woman, then opened the notebook and said, "Let me introduce myself first, I am Gu Chen from the third team of Criminal Investigation of Furong Branch, this is my colleague Lu Weiwei, this is Yuan Shasha."

"Hello."

Lu Weiwei and Yuan Shasha also nodded slightly, as they had simply met the middle-aged woman.

"Do you know why I asked you to come back?" Gu Chen turned his pen with his right hand and asked.

The middle-aged woman nodded: "Yes... because my house was burned."

Gu Chen suddenly stopped turning his pen, raised his head and said, "What's your name? Tell me your ID number."

"Oh, my name is Hao Tong, and my ID number is..."

Hao Tong was also very nervous at the moment, so he hurriedly informed Gu Chen of his personal information completely.

After recording, Gu Chen asked again: "Ms. Hao, the specific situation is like this. Your house suddenly caught fire tonight. After all kinds of firefighting efforts and the torrential rain tonight, the main body was finally saved. architecture."

"But all the interior decorations have been burned, including the cat you raised, and the goldfish tank."

It was also when Gu Chen mentioned cats and goldfish that Hao Tong's eyes froze for a moment, and then he quickly regained his composure.

Since Xu Youcai, the master driver, only informed that his villa was burned, he provided very little information to Hao Tong.

In addition to the summons from the police, Hao Tong was also traveling day and night, and he knew nothing about the situation here.

But Gu Chen's deliberate question just now startled her, as if those little things in her heart were suddenly known to others.

Hearing Gu Chen's words, Hao Tong also smiled calmly: "It's been hard work, Comrade Police, I really don't know how to thank you."

"If you really wanted to thank you, you shouldn't have set the fire on fire." Lu Weiwei, who was standing beside her, also said angrily.

Hao Tong was taken aback for a moment, and looked at everyone with a sense of urgency, and then couldn't help asking: "I said comrade policeman, what do you mean by that? My house has already been burned."

"I know, of course you don't need to remind me, you set the fire on." Lu Weiwei also continued what she said just now.

"Hehe." Hao Tong couldn't help laughing twice, looked at Yuan Shasha and Gu Chen, and then retorted: "Comrade police, you... did you make a mistake? You said I set the fire? I don't In Jiangnan City."

"And I also heard my husband call and say that our house is on fire and the house is gone. He told me to come back quickly. That's why I came here day and night."

Looking at Gu Chen's indifferent eyes, Hao Tong said again: "As soon as I return to Jiangnan City, I will come to your Furong branch immediately without stopping for a moment. My parents can testify."

Gu Chen nodded slightly: "So?"

"So?" Hao Tong looked at Lu Weiwei, and said angrily: "So this lesbian, indiscriminately said that I set the fire and that I was sick? He ran so far to Jiangnan City at night to burn down his house for fun. ?”

"Then I ran back all day and night, and then ran back after receiving a call from my husband? Am I sick?"

Also confused by Lu Weiwei's words just now, Hao Tong put his hands on his chest and tilted his head, as if he wanted to argue with Lu Weiwei.

Lu Weiwei also said with a funny smile: "So, what happened to the quicklime in the closed room of your house?"

Hao Tong's ears perked up, his whole expression froze for a moment, and he secretly glanced at Lu Weiwei.

"Also, your cat has been hungry for many days, right? You didn't prepare enough cat food at all. Your cat was starving even skinny, but you put a tank of goldfish on the bookshelf, Is this the rhythm of cat food not enough for goldfish?"

Hearing Lu Weiwei's words, Hao Tong's face was startled, and Dai Mei frowned slightly: "You...what are you talking about? What kind of cat food and lime?"

"Don't pretend to be Hao Tong, we all know." Yuan Shasha also glanced at Gu Chen beside her, and then said to Hao Tong: "I, Senior Brother Gu, have restored the scene of the fire according to the scene environment."

"You should know that this cat doesn't have enough cat food at all, so you deliberately placed a fish tank with goldfish on the bookshelf, and when the cat was hungry, he climbed up the bookshelf and knocked over the fish tank. The time to swallow goldfish to satisfy hunger is also the time to pour the water in the fish tank on quicklime."

"You don't know the reaction between water and quicklime, do you? It is precisely because of the release of a large amount of heat that it reaches a certain ignition point and ignites this flammable house."

"And we have checked that, except for a large number of flammable objects next to the bookshelves, this airtight room is covered with flammable wallpapers. This is the reason why your home was burned down."

"Because from head to toe, all of this is your own carefully arranged conspiracy, isn't it?"

"I……"

Hao Tong was suddenly stunned.

The way she looked at the three of them changed.

It was also when Yuan Shasha explained the situation to Hao Tong based on Gu Chen's investigation results, Hao Tong was trembling with fright.

It seemed that the reason why he came here all the time was to convict himself?
"Where is... my husband?" Hao Tong took out his phone in a panic, and said tremblingly, "I... I don't want to talk to you, I... I want to find my husband, I want to call him."

As soon as the voice finished speaking, the number Hao Tong dialed just now, the phone rang from Gu Chen's desk.

Gu Chen also put down the writing pen, then took Xu Youcai's mobile phone in his hand, shook it, and said, "Don't worry, your husband Xu Youcai is also staying at the Furong branch office. After you explain clearly, we will arrange for you to meet him." he."

"What...what?" Hao Tong lay on the seat in a daze, and murmured, "You...you arrested him too?"

"So...why did you set the fire?" Gu Chen said.

……

(End of this chapter)