Weiyang High School is not only famous in X city, but also quite famous in the country. It belongs to a century-old prestigious school. It has always been in the top three in the ranking of national prestigious schools. There have been many celebrities. It is from here that many parents have sharpened their heads and want their children to go to school.

Today coincides with the school day of Weiyang High School. More than 400 alumni gathered here to share friendship, relive time, make suggestions and seek common development of the school, and bless Weiyang through the glorious course of 101 years.

Lin Mo was one of the invited alumni, and Ziao Zhen and Jing Sa followed.

After entering the campus, you will see two spectacular rows of plane trees. It is said that it was planted when the school was built. The trunk is thick and lush, and the rustling sound makes a sound, covering the 100-meter road to the teaching building. Is the most competent defender, day after day, year after year, yellow and green, green and yellow, welcoming every child who comes to school.

It is really ten years of trees and a hundred years of trees.

Because it is the school day, the atmosphere is warm along the way, people are coming and going, both sides are covered with banners, the school is full of reporters, the flash is constant, and there are many young people who come back to their alma mater to participate in the school celebration, bringing couples and family, Remember the good old days.

Both teachers and students wear white T-shirts printed with Weiyang school badges, adhering to the concept of following the custom in the hometown, both Gao Zhen and Jing Sa also bought T-shirts and found a female toilet to replace them. Lin Mo received it A T-shirt was attached to the invitation letter for the celebration.

The T-shirt is very cute. In addition to the school badge and the school ’s mascot, I do n’t know if it is too cute. After wearing it, he looks younger and looks like a high school girl. A few high school boys saw it and came over to talk. , Asked her for her mobile phone number, and desperately asked which class she was from, making Jing Sai laugh and tremble.

Finally, Lin Mo showed the police badge before she got out.

After the start of the celebration, there were many students performing and celebrating activities, because the matter of asking someone to talk was arranged in the afternoon, the three came a little early, just like the people who came to attend the celebration, they joined together for a while, and let Lin Mo Lead them to visit the school.

Weiyang's campus environment is very beautiful, and the architecture is very simple and elegant. It belongs to a boarding school and covers an area of ​​150 acres. The International Department was established five years ago. At present, there are more than 2,000 students in the school, and they come to 22 provinces and cities As well as nearly 20 countries and regions, it has become an international school.

Zeng Zhen and Jing Sao followed Lin Mo in a circle. The school was really big, with complete facilities, and even a swimming pool. If we did n’t know that Wei Yang was a public school, I would really think it was a noble school.

The three came to the dormitory building. Lin Mo looked at the red wall and green tiles in front of him, and was very nostalgic in his heart.

The entrance of the dormitory building hangs the school regulations and the introduction of the dormitory. It looks better than the dormitory of many universities. Each dormitory has four beds. Below the bed are cabinets and desks. Every two dormitory rooms share a bathroom. There are four in the bathroom. A toilet and two bathrooms are very luxurious facilities.

The school rules are very militarized. They wake up at 6 o'clock and start running at 6:30. When the weather is hot, they must do exercises. At 6:50, they must start to study early. One minute later is not enough.

In the hall of the dormitory, a glass cupboard attracted the attention of the discord. Inside was a metal plaque engraved with people's names.

Lin Mo introduced later, "This is a record of alumni, and above are the celebrities and outstanding people who have graduated from self-defense."

The so-called alumni record is a big-name alumni record, many schools have this habit to motivate students.

The first line of Feng Yunlu says: Today you are proud of your alma mater, and tomorrow your alma mater is proud of you.

When many students choose a school or go to school, the most talked about is the great big guys who have come out of the school. After seeing more and listening more, they will want to be one of the list.

Because this is the supreme glory.

Jing Sa pointed out that there are many Lin surnames above, "Why are they all surnamed Lin."

Lin Mo pointed to himself, "Many of our Lin family children graduated from Wei Yang."

"It's such awesome!" Jing Sa shocked, and immediately posted a close look on the glass window. "Really, the posts and medals behind him are all related to fire protection."

He was also surprised that this Lin family is not just a fire fighting family, but also an elite.

"Then you are the top student in the college entrance examination?" Jing Sa asked.

"No. 1 champion?" He shook his head. "No. 1 champion is not for everyone, but my family really has one."

Jing Sa asked curiously: "Who?"

"My second uncle, is the science champion of XX year!"

Jing Sa gave his thumbs up to him, "Awesome!"

Lin Mo was not proud of being praised by others, and he still sternly said, "Okay, do n’t yell, it ’s about time, we ’ll find a place to eat first, and after dinner we will find someone to understand Chu Li ’s situation . "

This is the most important purpose of this trip.

The three of them swayed to the cafeteria again. Lin Mo ’s invitation letter stated that the alumni could receive the school lunch for free with the invitation letter. Jing Sa and Gao Zhen did not have it. Lin Mo readily gave his share to him, and then went to the queue Buy yourself and Jing Sa.

Jing Sao looked at the plate in his hand, and said with a frown, "I thought he retreated because of difficulties, and the key moment is still close to you."

"You want it, then I will give it to you!"

"Don't!" Jing Sa pushed her dinner plate back, "This is what people want, I can't bear it."

Lin Mo held two large plates in the crowd, avoiding the crowd to come back.

Seeing more and more people, the three of them panicked in the cafeteria, and they left the cafeteria and found a quiet lawn to sit down.

The school lunch was very sumptuous. The special dishes were two spiced pork trotters, which were stewed crispy and melted in the mouth. The flavor of the five spices also penetrated into the meat firmly and served very well.

Jing Sa praised: "This Kung Pao Chicken is also very delicious. Sure enough, the prestigious school is the prestigious school, and the dishes are more delicious than others."

He looked at Lin Mo, "The teacher you contacted said when you can meet."

"At two o'clock in the afternoon, she happened to be able to take a lunch break."

Xuan Xuan glanced at his watch, more than an hour before two o'clock, don't worry, taste the food of famous schools.

After eating, the three sat on the lawn and rested for a while. Just after 1:30, Lin Mo ’s cell phone rang.

"Ms. Lu, now? Okay, I'll come over immediately."

He hung up the phone and said to Luan and Jingsa, "She is free now, and we can pass right away."

Zumiao got up, patted the grass scraps on his body, followed him with Jing Sa and walked to the teaching building.

Mr. Lu is a chemistry teacher in his mouth. He is almost sixty years old. He is slightly blessed. He is popular with middle-aged and elderly women ’s popular hairstyles. The mid-point bangs are curved. Mainly fluffy and thick straight hair, dyed less conspicuous wine red, it looks very fashionable, a lot younger than her actual age, her face is round, her skin is very white, and it matches the gentle curly hair very well. good.

When she saw Lin Mo, she walked up with a smile and patted him on the shoulder. "Captain Lin, I haven't congratulated you on winning the excellent national police."

"Mr. Lu, don't laugh at me."

"Why is this a joke, the deputy headmaster said yesterday that you should also be engraved into the alumni record."

Lin Mo is absolutely qualified for this matter, alumni Feng Yunlu.

After hearing this, Lin Mo immediately twitched his face, "No, let my grandfather know that he is mad." But he is the only person in the Lin family who is not a fireman. Officer, adding his name is a challenge, letting his grandfather know that he has to blow his beard and stare.

"Look at you, you think Grandpa Lin wouldn't know about it. He said no to his mouth, and he was stunned."

The Lin family is considered to be the Fengyun family in Weiyang, and they are all firefighters. In X city, they are equal to the hero family. Many high school girls want to marry in puberty is the Lin family.

Lin Mo, the eldest son and grandson, although not a fireman, but also a first-class outstanding policeman, is equally proud.

"Don't mention this, I was terrified of my grandfather's flushing gun ..." He was rushed to the police academy for a while, but his bones hurt when he remembered.

Teacher Lu smiled and patted him on the shoulder again, "You in high school were more bullish than you are now."

He scratched his head, "You were frivolous at that time!"

Teacher Lu looked at Jing Sa and Zhen Xuan, "Is these two ...?"

Lin Mo introduced that these two are my colleagues, Jing Sa and Duan Muyan. "When he talked about how to speak, he added a special sentence," She is an adult, not a high school student! " "

Lu Xuan nodded calmly.

"Hello!"

"Ms. Lu, hello!"

After the greeting, Teacher Lu invited them to go to the staff lounge. Now there are performances outside, many people have gone, and there is no one in the staff lounge.

After sitting down, Lin Mo immediately asked about Chu Li.

Teacher Lu said: "I remember Chu Li very well. At that time, I was still an intern teacher. She came to teach chemistry for senior three students. It was not officially hired. It was just that the school heard that she was very good at teaching and invited her to come and open a second class She is very capable and mobilized all her students ’interest in chemistry. She has done several magic-like experiments. One of them is particularly interesting, called fire in water!"

His eyes glared, "Fire in the water?"

Teacher Lu nodded, "It sounds amazing, but actually uses the principle of chemistry, put white phosphorus in the water, pass oxygen or air, and then heat the water temperature, because the ignition point of white phosphorus is only 40 degrees, so when the water temperature exceeds 40 When the temperature is high, the white phosphorus will be ignited and it will look like a fire in the water. "

The three shuddered suddenly.

White phosphorus and water ...

There are also two things at the scene of the murder of Zhou Bin, Xing Xiaolei and Huang Jian.

Lin Mo and Jing Sa suddenly felt a little excited in their eyes.

He said quietly and asked, "Is there a graphic illustration of this experiment?"

"Why? Are you interested? No problem, I can write down the steps for you."

Lin Mo said: "Then trouble you!"

"It's okay, I am also a chemistry teacher, this is a small thing."

Lin Mo quickly handed her the special police notebook.

While Mr. Lu was drawing an illustration, Xu Zhen asked again, "When Chu Li was at school, did anyone close to her walk, such as a male teacher ..."

Teacher Lu thought for a while, "She is a very quiet girl, who is going to be close to it, it is a student. When she came, there were many young unmarried male teachers who were interested in her, but at that time she was still a College students, with their shy personality, are not as open as they are now, and few of them are bold in chasing them. The students like her very much, and they always turn around her. "She looked at Lin Mo and smiled," Yes, I want to say chasing She, several high school boys are very enthusiastic, as our captain Lin said, young and frivolous! The high school at the age of seventeen or eighteen was when the love began, and she saw her good-looking, good personality, all finished She wanted to marry her as his wife, and she made a lot of jokes. She was thin-skinned, and at that time her faces were amused by a few boys. "

Jing Sa smiled and said, "Hehe, isn't it? At that time, boys like women who are bigger than themselves."

"Isn't it? At that time, I had the courage to follow her back home and scared her all. For this matter, several of our teachers were still worried that something would happen. At that time, it was not taboo than it is now. Then, it was estimated that it was a high school education. They suddenly settled down and never teased her. "

Lin Mo asked, "Have anyone pursued her outside that school? For example, did anyone pick her up after school?"

Teacher Lu shook his head, "She always walks alone, never sees anyone entangled, and is polite to people. At that time, our former principal particularly appreciated her talents and educational methods. Do n’t get me wrong, our former principal is a The woman once asked her specially to ask her if she wanted to be Wei Yang to become a teacher after graduation. She also agreed with great pleasure, but she refused after graduation. "

He asked: "Rejection? What is the reason?"

For a student who graduated from a normal university, you can immediately have a job as a teacher in a prestigious school, or a high school teacher, you should be glad to accept it.

"I do n’t know the specifics, but I heard later that she is going to get married soon after graduation. Her husband is a primary school teacher. She wants to be at home with her husband and teach her son. But that is someone ’s own choice, and it ’s not easy to force it. ”

According to the results of the police investigation, Chu Li did marry Jiang Zhan after graduation. Later, because of childbirth, he was not in good health and had no fixed job. Instead, he sought a part-time job near Hutou Village. Tutor children who are preparing for high school in junior high school.

Similarly, during her time as a tutor, she had no special contacts with anyone.

"Why are you suddenly interested in her? She has passed away for many years!"

Lin Mo said, "There is a case that has something to do with her, so we'll ask you, I'm so embarrassed, how long has it bothered you."

"It's okay, the police and the people are cooperating!" She passed the drawing, "Here, to you."

Lin Mo handed over the notebook to Mr. Lu, "Mr. Lu, if you remember anything later, remember to contact me."

"Okay, people are old and old. Some things really don't come to mind at once. I'll go back and think again."

When the words fell, the three of them left.

When leaving the school gate, Lin Mo was about to get on the police car, and saw that Xu Zhen had been concentrating on looking at the illustration. She didn't even notice the stone pier in front of her to stop the parking of the motor vehicle.

The stunned stunned for a moment, only to find that he almost hit the stone pier, fell four feet up, "Thank you."

He lowered his hand and was three feet away from her. "You're welcome."

Jing Sa looked at her and couldn't help covering her mouth to snigger and waited in the car. She said to her, "You see how awkward he is, like you, and dare not chase you."

He stared at her, "Long word!"

Jing Sa threw his tongue out and whispered, "I see him, he was conquered by Kangxi's meal, which is typically short-handed and soft-mouthed."

"You don't beat drums here, it is impossible for me and him, and I am comfortable with him like this."

"Yes, you like Kangxi, I know! Kangxi is not bad, but Yinqi is terrible!" Jing Sa complained when thinking of Daheishan.

"Aren't you claiming that he is a fan of brains? What's wrong with you now?"

"Of course I still like him. As a star, he is awesome, but as a girlfriend's man, I feel trembling."

He said, "You can rest assured that he promised me that he will not bully you."

Jing Sa's eyes lit up, "Really?"

Nodded, Kangxi personally promised it.

"That's good, he listens to you, it's better ..." She rubbed her lips, "I know he's making a new movie recently, waiting for the movie to be released, can I get two tickets for the premiere, and the crew to visit the line No, I heard that there are a lot of great players in this drama, you do n’t know, when chasing you, he promised that as long as he is around, I can get it for free, but after chasing you, he ignores me , You have to talk about him, and ... and ... "

Jing Sa said endlessly what she wanted.

皛 皛: "..."

This is definitely a rhythm.

**

After returning to the Public Security Bureau, Mr. Li asked Xiao Li to buy back all the materials and utensils needed for the underwater fire experiment and started the experiment on the spot in the conference room.

When the flames burst into the water, everyone was stunned. They were really burning in the water. The water did not extinguish the fire at all. It was not only magical, but also spectacular.

Jing Sa looked at the burning flame and excitedly said, "So the murderer used this method to kill people?"

At first, they thought it was scorching the body, soak the body in the water to extinguish the fire, but this experiment is just the opposite. If the fire can be burned in the water, the deceased is probably put into the water and then burned to death The direction is completely reversed.

Lin Mo said: "This experiment looks simple, but if you are not familiar with chemistry, it is impossible to think."

He was sitting at the top of the conference table and fell into silence.

"Xiao Xuan, why don't you talk?" Jing Sa asked.

"Don't you find there is a big bug?"

Lin Mo twisted his eyebrows and glanced at the flame burning in the water. The beaker was hot water. The hot water could make the white phosphorus reach the ignition point, and the air inserted in the test tube inserted backwards provided the white phosphorus with oxygen. , So it burned.

He suddenly understood, "Hot water!"

He said: "At the crime scene, the Tanzi where Zhou Bin ’s leg was located, the water tank of Xing Xiaolei ’s corpse, and the garbage sorting well soaked in Huang Jian ’s death, there was no trace of burning on the outside or the bottom. The murderer was How to heat water. "

Without hot water, the burning point of white phosphorus is low, and it cannot burn.

In the experiment, the white phosphorus in the beaker was able to burn because the alcohol lamp under the beaker was heating, and the water in the beaker had a temperature.

Zhang Youcheng said, "What about heating the water directly, that is, putting the deceased into the tank and then adding hot water?"

Cao Zhen shook his head, "This is too unrealistic. According to the remaining water at the time, there are at least five gallons of water, that is, the amount of water in four drinking buckets. If the murderer wants to kill people with this method, he must carry at least several A bucket, and during the incident, unless the insulation is effective, the water will be cold. "

The water volume of the four drinking buckets will be very heavy in weight and large in volume. It is too dazzling to carry on your body. Even if it is in a remote place, there is no guarantee that it will not meet anyone.

Xiao Li said: "How about boiling water on site?"

"No, this possibility is also very small. When Zhou Bin died, he was in a cave. The conditions are limited. Even if it can really boil water, how big a container do you think you need to burn? Of course, you can say that you do n’t need to burn it all at once. , You can burn them separately and pour them into the deceased ’s container, but it takes time before and after, the hot water is burned first, how to keep it warm, and the most important thing is ... "Xuan Xuan looked at everyone," Oxygen ! "

"what!?"

Everyone was startled and looked back at the experiment on the conference table.

He pointed to the test tube inserted into the water upside down. "There is oxygen in the test tube and the pressure is the same as the atmospheric pressure. Therefore, the water will not enter the test tube when it reaches the bottom of the water. Oxygen, which causes the heated water to trigger the burning of white phosphorus, does not mean that white phosphorus is added to the water, and it will burn when the temperature is reached. "

In the experiment, white phosphorus is combustible, hot water provides temperature, and the air in the test tube provides oxygen. The three must be present before the fire can burn in the water, but the situation of the three dead persons is different. Although water and white phosphorus are available, the water Without oxygen, it means that there is no test tube, so even if there is hot water, white phosphorus cannot burn.

Jing Sa pulled her hair a bit, and for some girls, science was definitely a mental torture.

The joy and joy on the faces of the people fell silent again, and fell into a cloud of misery.

After a long while, there was a glorious look in the crimson eyes, "Stone!"

Everyone looked at her and didn't understand what she meant.

"stone?"

She nodded, "In addition to water and white phosphorous, there was a stone in the scene of the three dead."

This is also the doubt she has always been cherishing.

"Linmer!" She called.

Lin Mo had already taken action, "I immediately asked the forensic team to test the composition of the stone."

Jing Sa asked, "Do you think there is a problem with the stone?" In her opinion, it was an ordinary stone.

"Since it will appear on the scene of the case of the three dead people, it will definitely not be a coincidence. I am certain that this stone has a problem. In addition ..." She paused, her eyes bright, "This experiment is not completely useless. , I think the murderer may have improved on this basis. He must have used some special method to create this murder. Of course, this is my guess, you ... "

The words "Can't Believe" were interrupted by Cao Zhen, Zhang Youcheng, Xiao Li, and Jing Sa before they even spoke.

This sentence, they have heard ears cocoon.

They spoke in unison: "We believe in you!"

Xiao Li said suddenly, "I have a question ..."

"You want to say that among the three dead, Zhou Bin was the only one not found in the water, right?"

There is only Zhou Bin's leg bones in the water hole of the cave. This is the only difference between him and Xing Xiaolei and Huang Jian.

Xiao Li nodded.

"This, I think I know why, but I have to wait until the killing method is cracked."

Jing Sa was in a hurry. "You are like that. Say a little bit and hide a little bit. Are we feeling bad?"

It's like listening to gossip, listening to the first half, but the second half is gone. The person listening will feel very itchy.

But Xu blushed inexplicably, "What are you in a hurry, I will always tell you then."

Jing Sa was strange. She blushed and was about to ask, but she was distracted by the words.

"I think we are looking for a firefighter!"

She suddenly came to such a sentence, the people present were a little too late to react.

"Fireman?" Lin Mo walked in at this moment, hearing the firefighter's three frowns immediately twisted into a line.

The Lin family is a family of firefighters. In his mind, the firefighters can never be a murderer.

"I will judge in this way for three reasons. First, Jiang Yunnuo's painting, second, his composition. Third, the murderer's murderous technique."

Jing Sa had seen the painting, "That stickman's waist is like a tube and a barrel?"

"Yes, I didn't think about what it was at first, but after seeing his composition, I thought, that is the head of the flush gun!"

Firefighters use high-pressure flushing guns when fighting fires, in order to shoot water farther, especially like high-rise fires, flushing guns will be of great use.

Lin Mo retorted: "Jiang Yunheng's composition did not mention what his biological father was. He only talked about saving the people and protecting the country's property. This is the same with the police. It can also be the People's Liberation Army."

"If it is a policeman, according to the child's thinking, he should write about catching bad guys, or smashing the bad guys all over the net, but he didn't mention a word. If it is the People's Liberation Army, although it is in line, he wrote this in his composition: Every time I see the news of my father, I feel so proud. He protects the property of the country like a god. He is in the wind and rain, not afraid of hardships, and defends the lives of the people like a mountain! '"

Cao Zhendao: "This is very similar to the People's Liberation Army, but if the People's Liberation Army uses" every time ", it seems a little bit more."

"When the People's Liberation Army of China dispatched, it was probably a natural disaster, but I checked the time when Jiang Yunheng wrote this composition. In the past few years, no natural disasters have occurred in City X, of course, including the whole country, so he is in the news. It is impossible to see the PLA. "

Lin Mo's eyes dimmed, which represented his approval.

"What about the third point?" Xiao Li asked.

"That's even simpler. If the murderer really used a fire in the water to kill, why do you think he used such a complicated method to kill?"

"Perverted !?" Jing Sa said, scratching his head, "I really think it's perverted."

Stabbing is also a murder, and directly setting fire to it is also a murder, but this method is really strange.

"That's because of the circumstances of the crime scene!"

"surroundings!?"

Mr. Xu nodded, "Zhou Bin was in the mountains when he died, and the vegetation was lush. Xing Xiaolei was in a wooden structure warehouse when he died. There are also some chemical agents that are easy to cause fire. As for Huang Jian, he is in the garbage. The incineration plant was killed, and there are many combustibles piled around. "

"I see!" Jing Sa yelled, "He doesn't want to cause a fire!"

"He was a man who wanted to kill people with fire, but did not want to cause a fire when setting fire, but the fire in the water happened to help him. When the water is cold, the fire will automatically extinguish, even if the dead are in the process of being burned. Suddenly waking up, struggling and twisting, the fire will automatically extinguish after leaving the water. He does n’t have to worry about some uncontrollable factors that lead to a fire. A person who can brutally kill three lives, but he is worried about whether it will In addition to firefighters, in addition to the most intuitive solution to the hazards of fire, I really ca n’t imagine that there will be anyone who will kill such a large amount of money. "

After the speech, everyone was silent.

As she said, this is indeed an unbelievable one, but it definitely fits the reason for the murder.

In this world, apart from firefighters, there will be no second occupation that is so sensitive to fire, because once a fire is caused, its catastrophe can never be predicted.

－－－－－－ Digression －－－－－－－

In other words, the experiment of making fire in water is real, but can it kill people. Ha ha. Let's not explore it, chemistry man, please don't talk to me, in addition, the murderer reaches this chapter, I think many people can guess, in fact, some people have already guessed before this, but the motive, you may not have discovered Revenge is one of them, but there is something deeper.

In other words, all my cases may be ethical. There are more reasons. I do n’t know if you will be bored.