Weiyang High School, not only famous in X City, but also quite famous in the country, belongs to a century-old famous school, has always been the top three in the ranking of national famous schools, has produced many celebrities, the annual liberal arts and science college entrance examination champions, are all from here, is to make many parents sharpen their heads, but also want their children to go to school.

Today coincides with the anniversary of Weiyang High School, where more than 400 alumni gathered to talk about friendship, relive time, make suggestions, seek common development of the school, and jointly wish Weiyang 101 years of glorious history.

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

After entering the campus, you will see two magnificent rows of plane trees, which are said to have been planted when the school was founded, with thick, lush, rustling sounds, covering the 100-meter road leading to the school building, like the most competent guardians, day after day, year after year, yellow and green, green and yellow, welcoming every child who comes to school.

It's really a ten-year tree, a hundred-year-old tree.

Because it is the school anniversary, the atmosphere along the way is warm, people come and go, banners are hung on both sides, the school is also full of reporters, flashing lights, and there are many young people who come back to their alma mater to participate in the school anniversary, with couples, with their families, remembering the good times in the past.

Whether it is a teacher or a student, they all wear white T-shirts printed with the school emblem of Weiyang, adhering to the concept of following the local customs, Wanying and Jingsa also bought T-shirts and found a women's toilet to change into, Lin Mo came with a T-shirt when he received the invitation to the school anniversary.

The T-shirt is very cute, in addition to the school emblem, there is also the school's mascot, I don't know if it's too cute, I'm younger after wearing it, I live like a senior high school girl, a few high school boys saw it, and I came over to talk, asked her for a mobile phone number, and desperately asked her which class she was from, so that Jing Sa on the side laughed and trembled.

In the end, it was Lin Mo who showed her police badge to let her get out.

After the school celebration began, there were a lot of student performances and school celebration activities, because the matter of finding someone to ask was arranged in the afternoon, and the three of them came a little early, so they simply joined the excitement for a while like the people who came to participate in the school celebration, and by the way, let Lin Mo lead them to visit the school.

Weiyang's campus environment is very beautiful, the building is also very simple and elegant, belongs to the boarding school, covers a total area of 150 acres, set up the international department five years ago, and currently has more than 2,000 students, who come to 22 provinces and cities in China and nearly 20 countries and regions, as if it has become an international school.

Xuan Wan and Jing Sa followed Lin Mo around, this school is really big, the facilities are complete, and there is even a swimming pool, if you don't know that Wei Yang is a public school, you will really think that this is an aristocratic school.

The three of them came to the dormitory building, and Lin Mo looked at the red walls and green tiles in front of him, feeling quite nostalgic.

The entrance to the dormitory building is hung with the introduction of the school rules and the dormitory, which looks better than the dormitories of many universities, with four beds in each dormitory, cabinets and desks under the beds, and a bathroom for every two dormitories, and four toilets and two bathrooms in the bathroom, which is a very luxurious facility.

The school rules are very militar, get up at six o'clock, start running at half past six, do exercises if the weather is hot, start self-study early at six fifty o'clock, and don't do it one minute late.

In the lobby of the dormitory, a glass cabinet caught her eye, and inside was a metal plaque engraved with people's names.

Lin Mo introduced later, "This is the alumni directory, which is the celebrities and outstanding people who have graduated from the past. ”

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

The first line of Fengyunlu reads: Today you are proud of your alma mater, and tomorrow your alma mater will be proud of you.

When many students choose a school or go to school, what they talk about the most is what awesome big names the school has produced, and if they see and listen to more, they will want to aspire to become one of the people on the list.

For it is the highest glory.

Jing Sa's sharp eyes found that there were a lot of people surnamed Lin on it, "Why are they all surnamed Lin." ”

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

"That's awesome!" Jing Sa exclaimed, and immediately stuck to the glass window to take a closer look, "Really, the positions and medals that follow behind are all related to firefighting." ”

She was also surprised, this Lin family is not only a firefighting family, but also an elite.

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

"Champion?" He shook his head, "Not everyone can do it, but there is one in my family." ”

Jing Sa asked curiously: "Who?" ”

"My second uncle is the top science student in XX years!"

Jing Sa gave him a thumbs up, "Awesome! ”

Lin Mo didn't have any pride on his face, and he still didn't smile, "Okay, don't shout, it's almost time, let's find a place to eat first, and after eating, we can find someone to understand Chu Li's situation back then." ”

That's the most important purpose of this trip.

The three of them wandered to the cafeteria again, Lin Mo's invitation letter said that alumni can receive a free school lunch with the invitation letter, Jing Sa and Wan Wan didn't, Lin Mo happily gave his share to Wan Wan, and then went to line up to buy his and Jing Sa's share.

Jing Sa looked at the plate in Wanwan's hand, and said with a wink, "I thought he would retreat in the face of difficulties, but he is still close to you at the critical moment." ”

"If you want, then I'll give it to you!"

"Don't!" Jing Sa pushed back the plate she had pushed over, "This is someone else's intention, I don't dare to take it." ”

Lin Mo brought two large plates in the crowd and walked back to avoid the crowd.

Seeing that there were more and more people, the canteen was crowded in a panic, so they left the cafeteria and found a quiet lawn to sit down.

The school lunch is very rich, the specialty dish is two spiced pig's trotters, stewed crispy, melt in the mouth, the flavor of the spice also penetrates into the meat, very good for rice.

Jing Sa praised: "This kung pao chicken is also very delicious, sure enough, a famous school is a famous school, and the dishes are better than others." ”

She looked at Lin Mo, "The teacher you contacted said when we could meet." ”

"It's two o'clock in the afternoon, and she can take a lunch break at that time."

She glanced at her watch, there was still more than an hour before two o'clock, so she didn't have to worry about it, and she tasted the food of the famous school.

After eating, the three of them sat on the lawn and rested for a while, and just after half past one, Lin Mo's mobile phone rang.

"Teacher Lu, now? Okay, I'll come right over. ”

He hung up the phone and said to Ying Ying and Jing Sa, "She's free now, we can go over right away." ”

She got up, patted the grass clippings on her body, and followed him with Jing Sa to the teaching building.

The teacher Lu in his mouth is a chemistry teacher, almost sixty years old, slightly fat, permed the hairstyle that is more popular among middle-aged and elderly women, the middle bangs are curved, and the chin below creates a valgus textured curl, and above the chin is mainly fluffy and thick straight hair, dyed with a less conspicuous burgundy, it looks very fashionable, much younger than her actual age, her face is a little round, her skin is very white, and the gentle curly hair is very matched, and the temperament is good.

Seeing Lin Mo, she walked up with a smile and patted him on the shoulder, "Captain Lin, I haven't congratulated you on winning the National Outstanding Police Officer." ”

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

"How is this a joke, yesterday the vice president also said that he would engrave you into the alumni directory."

In the matter of alumni records, Lin Mo is definitely qualified.

After hearing this, Lin Mo's face immediately twisted, "No, let my grandfather know, I'm not angry." "He is the only person in the Lin family who is not a firefighter, and this Lin family firefighter who has been recorded by the alumni in the water, adding his name is simply a call, so that his grandfather knows that he has to blow his beard and stare at him.

"Look at you're scared, do you think Old Lady Lin won't know about this, he said no, and he was worried in his heart."

The Lin family is a Fengyun family in Weiyang, and they are all firefighters, and they are equivalent to a heroic family in X City, and the person that many high school girls want to marry most in adolescence is the Lin family.

Lin Mo, the eldest son and grandson, although he did not become a firefighter, was also a first-class excellent policeman, and he was equally proud.

"Don't mention it, I'm terrible about my grandfather's flush gun......" When he was admitted to the police academy, he was washed all night, and his bones hurt when he thought about it.

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

He scratched his head, "I was young and frivolous! ”

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

Lin Mo introduced, these two are my colleagues, Jing Sa and Duanmu Wanwan. Speaking of Tintin, he added in particular, "She's an adult, not a high school student!" ”

She nodded calmly.

"Hello!"

"Hello, Mr. Lu!"

After the greetings, Mr. Lu invited them to the staff lounge, and 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: "Chu Li, I remember very clearly, I was still a trainee teacher at that time, she came to teach chemistry to senior high school students, not a formal employment, but the school heard that she is very good at teaching, and invited her to come over to open a second class, she is very capable, mobilized the students' interest in chemistry, and did several experiments like magic, one is particularly interesting, called fire in water!" ”

Her eyes lit up, "Fire in the water?" ”

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

The three of them shuddered.

White phosphorus and water ......

The scene of the murder of Zhou Bin, Xing Xiaolei, and Huang Jian also had these two things.

Lin Mo and Jing Sa suddenly had a little excitement in their eyes.

She asked in a calm tone, "Is there a diagram of this test?" ”

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

Lin Mo said: "Then trouble you!" ”

"It's okay, I'm also a chemistry teacher, it's a small thing."

Lin Mo hurriedly handed her the special notebook for the criminal police.

While Teacher Lu was drawing a diagram, she asked again, "When Chu Li was in school, were there any people who were close to her, such as the male teacher......

Teacher Lu thought for a while, "She is a very quiet girl, if you want to say who is close to her, 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 student, and her personality was also shy, not as open as now, and there were few people who boldly chased her, and the students liked her very much, and always revolved around her." She looked at Lin Mo and said with a smile, "By the way, if you want to chase her, several high school boys are very enthusiastic, just like our Captain Lin said, young and frivolous!" Seventeen or eighteen-year-old high school was the beginning of love, seeing that she was good-looking and had a good personality, they all said that they wanted to marry her as a wife after graduation, and made a lot of jokes. ”

Jing Sa smiled: "Hehe, it's not, at that time, boys liked women older than themselves." ”

"But it's not, at that time, there was the courage to follow her home, which scared her, for this matter, several of our teachers were still worried that something big would happen, at that time, it was not as good as now, teacher-student love was a taboo, and then it was estimated that high school studies were heavy, and they suddenly settled down, and they didn't tease her again."

Lin Mo asked, "Then has anyone outside the school pursued her?" For example, after school, did anyone come to pick her up? ”

Teacher Lu shook her head, "She is always alone, I haven't seen anyone entangled, and she is polite to people, at that time, our former principal especially appreciated her talent and education methods, don't get me wrong, our former principal is a woman, once I specially looked for her and asked her if she wanted to come to Weiyang to be a teacher after graduation, she was very happy to agree, but she refused after graduation." ”

She asked, "Refusal?" What is the rationale? ”

For a student who graduated from a normal university, he can immediately get a job as a teacher at a prestigious school, or he is still a high school teacher, he should be happy to accept it.

"I don't know the specifics, but later I heard that she was going to get married soon after graduation, her husband is a primary school teacher, and she wants to teach her husband and children at home wholeheartedly, and she doesn't plan to come out and show her face.

According to the results of the police investigation, Chu Li did marry Jiang Zhan after graduation, and then because of childbirth, her health was not very good and she did not have a regular job, but she found a part-time job near Hutou Village, specializing in tutoring children who were preparing for junior high school.

Similarly, during her time as a tutor, she did not have any special dealings with anyone.

"Why are you suddenly interested in her? She's been dead for years! ”

Lin Mo said, "There is a case that has something to do with her, so we came to ask you, I'm really sorry to disturb you for so long." ”

"It's okay, the police and the people are cooperating!" She handed over the drawing, "Here's it." ”

Lin Mo handed the notebook to Wanwan, "Teacher Lu, if you think of anything later, remember to contact me." ”

"Okay, people are old and old, and some things really can't be remembered all of a sudden, so I'll think about it when I go back."

After the words fell, the three of them took their leave.

Out of the school gate, Lin Mo was about to get into the police car, and saw that Yingxi had been looking at the diagram intently, and he didn't even notice the stone pier in front of him to stop the motor vehicle from parking, and reached out to pull her.

She was stunned for a moment, only then did she realize that she almost hit the stone pier and fell to the ground, "Thank you." ”

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

Jing Sa saw it in her eyes, couldn't help covering her mouth and snickering, and when she got into the car, she said to Yingwan, "Look at how awkward he is, he likes you, and he doesn't dare to chase you." ”

She glared at her, "Long-winded! ”

Jing Sa stuck out his tongue and whispered, "I see him, he was subdued by Kangxi's meal, a typical person with short hands and a soft mouth." ”

"If you don't beat the side drum here, it would be impossible for me to be with him, but I am comfortable with him like this."

"Yes, you like Kangxi, I know! Kangxi is not bad, but it is terrible to be a yin person! Jing Sa complained in his heart when he thought of the matter of the Great Black Mountain.

"Don't you call him a brainless fan? What, now it's a defection? ”

"Of course I still like him, as a star, he is still great, but as a man with best friends, I feel shaky."

Xuan Xuan soothed, "Don't worry, he promised me that he wouldn't bully you." ”

Jing Sa's eyes lit up, "Really? ”

Wanwan nodded, this was promised by Kangxi himself.

"That's good, he listens to you, it's better to ......" she rubbed her eyes, "I know that he is making a new movie recently, and when the movie is released, can you get two tickets for the premiere, and the crew will visit the class, I heard that there are many big names in this drama, you don't know, when chasing you, he personally promised that as long as it was his peripherals, I could ask for it for free, but after chasing you, he ignored me, you have to talk about him, and ...... And ......"

Jing Sa kept talking about what she wanted.

"......"

It's definitely the rhythm of inches.

**

After returning to the Public Security Bureau, Xiao Li asked Xiao Li to buy all the materials and utensils needed to make a fire in the water, and started to make this real food on the spot in the conference room.

When the fire burst into the water, everyone was stunned, it was really burning in the water, and the water did not extinguish the fire at all, which was not only magical, but also spectacular.

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

At first, they all thought that after burning the corpse, they soaked the corpse in water to extinguish the fire, but this is the opposite, if the fire can be burned in water, the deceased is likely to be burned to death by the fire after being put into the water, and the direction is completely reversed.

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

She sat at the top of the conference table and fell silent.

"Why don't you speak?" Jing Sa asked.

"Didn't you notice a big bug?"

Lin Mo twisted his eyebrows, and glanced at the flame burning in the water again, the beaker was hot water, and the hot water could make the white phosphorus reach the ignition point, and the air in the test tube inserted upside down provided oxygen for the white phosphorus, so it burned.

He suddenly understood, "Hot water! ”

"At the scene of the crime, the pond where Zhou Bin's leg bones are located, the water tank where Xing Xiaolei's corpse is located, and the garbage sorting well soaked in Huang Jian when he died, there are no traces of burning on the outside or at the bottom, how did the murderer heat the water." ”

Without hot water, no matter how low the burning point of white phosphorus is, it will not burn.

In the real yàn, the reason why the white phosphorus in the beaker can burn is because there is an alcohol lamp heating under the beaker, and the water in the beaker has a temperature.

Zhang Youcheng said, "What about heating 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 that 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 in this way, then he must carry at least several buckets, and in the process of the crime, unless it can be effectively insulated, the water will already be cold." ”

The amount of water in the four drinking buckets will be very heavy in weight, and the volume will be large, and it will be too eye-catching to carry on the body, even if it is in a remote location, but there is no guarantee that you will not meet anyone.

Xiao Li said: "What 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 you can really boil water, how much volume of container do you think you need to use to burn, of course, you can say that you don't need to burn it all at once, you can burn it separately, and pour it into the container where the deceased is in stages, but it takes time to wait before and after, first boil hot water, how to keep warm, and the most important point is ...... "Oxygen is needed!" ”

"Huh!?"

Everyone was startled, and then looked back at the real yàn on the conference table.

"There is oxygen in the test tube, and the pressure is the same as the atmospheric pressure, so if it reaches the bottom of the water, the water will not enter the test tube, and the mouth of the test tube that is turned upside down into the water can let the white phosphorus come into contact with oxygen, and the heated water triggers the combustion of white phosphorus, which does not mean that white phosphorus is added to the water, and the water can be burned when the water temperature is reached." ”

White phosphorus is a combustible, hot water provides temperature, and the air in the test tube provides oxygen, and the three must be available for fire to burn in water, but the situation of the three deceased is different, although there is water and white phosphorus, but there is no oxygen in the water, which is equivalent to the lack of storage in the test tube, so even if there is hot water, white phosphorus cannot be burned.

Jing Sa pulled her hair, science is definitely mental torture for some girls.

The jubilation and joy on everyone's faces fell silent again, and they fell into a gloomy mist.

After a long time, there was a sparkle in the bright eyes, "Stone! ”

The crowd looked at her, completely unaware of what she meant.

"Stones?"

She nodded, "The crime scene of the three deceased, in addition to water and white phosphorus, there is also a stone. ”

This is also the doubt she has been haunting about.

"Lin Mo!" She shouted.

Lin Mo has already taken action, "I'll immediately ask the forensic team to test the composition of the stone." ”

Jing Sa asked, "Do you think there is something wrong with the stone?" In her mind, it was just an ordinary stone.

"Since it will appear at the scene of the crime of the three deceased, it will definitely not be a coincidence, I am sure that there is something wrong with this stone, and ......" she paused, her eyes bright, "This is not completely useless, I think the murderer may have improved on this basis, he must have used some special method to create this killing, of course this is my guess, you ......"

Before the words 'can believe it or not' were spoken, they were interrupted by Cao Zhen, Zhang Youcheng, Xiao Li, and Jing Sa.

They already heard this sentence.

They said in unison, "We believe in you!" ”

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

"You're trying to say that among the three deceased, Zhou Bin was the only one who wasn't found in the water, right?"

There is only Zhou Bin's leg bone in the waterhole of the cave, which is the only difference between him and Xing Xiaolei and Huang Jian.

Xiao Li nodded.

"Well, I think I know why, but I won't know for sure until the murder method is cracked."

Jing Sa was anxious, "You are like this again, say a little, hide a little, we are very uncomfortable, okay?" ”

It's like listening to gossip, listening to the first half, but the second half is gone, and the heart of the listener will be very itchy.

皛皛 blushed inexplicably, "What are you anxious about, I will always sue you when the time comes." ”

Jing Sa was strange, she blushed something, and was about to ask, but she was diverted from the topic.

"I think we're looking for a firefighter!"

She suddenly said this, and the people present were a little too late to react.

"Firefighters?" Lin Mo walked in at this time, and when he heard the three words of the firefighter, his brows immediately twisted into a line.

The Lin family is a family of firefighters, and in his heart, firefighters can never be murderers.

"I would judge this way for three reasons, first, Jiang Yun's painting, and second, his composition. 3. The murderer's modus operandi. ”

Jing Sa looked at the painting, "That stickman has a pipe on his waist and a cannon barrel?" ”

"That's right, I didn't think it was at first, but after reading his composition, I thought it was the head of the water gun!"

Firefighters use high-pressure flush guns to shoot water farther, especially in high-rise fires.

Lin Mo retorted: "Jiang Yunheng's composition did not mention what his biological father's occupation was, but only said that saving the people and protecting national property was the same for the police, and it could also be the People's Liberation Army." ”

"If it is a policeman, according to the child's thinking, he should write to catch the bad guys, or to wipe out the bad guys, but he didn't mention a word, if it is the People's Liberation Army, although it also complines, but he wrote in the composition: 'Every time I see the news of my father, I feel so proud, he is like a god protecting the country's property, coming and going in the wind and rain, not afraid of hardships, and defending the lives of the people like a mountain!' ”

Cao Zhen said: "This is very similar to the People's Liberation Army, but if the People's Liberation Army uses 'every time', it seems to be a bit much." ”

"The dispatch of the People's Liberation Army in my country is generally a natural disaster, but I have checked the time when Jiang Yunheng wrote this composition, and there have been no natural disasters in X City in the past few years, including the whole country, so it is impossible for him to see the People's Liberation Army in the news."

Lin Mo's eyes darkened, which meant that he approved.

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

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

"Perverted!?" Jing Sa scratched his head after speaking, "I really think it's a pervert." ”

Stabbing someone to death is also murder, and directly setting fire to it is also murder, but this method is really weird.

"That's because of the environment at the scene of the crime!"

"Environment!?"

Wan Wan nodded, "Zhou Bin died in the mountains with lush vegetation, Xing Xiaolei died in a wooden warehouse, and there were some chemicals that could easily cause fires, as for Huang Jian, he was killed in the garbage incineration plant, and there were a lot of combustibles piled up around." ”

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

"He is a person who wants to kill people with fire, but he doesn't want to cause a fire when he sets fire, but a fire in the water happens to help him, when the water is cold, the fire will automatically extinguish, even if the deceased suddenly wakes up in the process of being burned, struggles and twists, and after leaving the water, the fire will automatically extinguish, he doesn't have to worry about arson, because of some factors that can't be controlled, leading the fire, a person who can brutally kill three lives, but he cares about whether it will cause a fire, except for firefighters, In addition to this sex profession that can solve the fire danger most intuitively, I really can't imagine anyone who would go to such great lengths to kill. ”

After saying that, everyone fell silent.

As she said, this is indeed an unbelievable reason, but absolutely fitting the modus operandi of killing.

There is no other profession in this world other than firefighters who are so sensitive to fire, because once a fire is caused, its catastrophic nature is absolutely unpredictable.

------Off topic------

In other words, the real yàn of making a fire in the water is real, but it can't kill people. Hehe. Don't explore, chemical cowman, please don't complain to me, in addition, the murderer to this chapter, I think many people can guess, in fact, some people have guessed before this, but the motive, you may not have found out, revenge is one of them, but there is something deeper.

In other words, all my cases may be ethical, and there are many truths, I don't know if you will get bored.