The Book of Death by Heart Poison

The second grade teaching building was put into use very hastily, and the monitoring arrangement was "short of catty and two". On the fifth floor where Class 20 is located, there is only one daily monitoring at the staircase on the right, and the coverage is limited.As for the monitoring in each classroom, it will only be activated during the exam.

从5月2号晚上9点40开始，陆续有学生从摄像头下经过，9点50以后，人流渐渐减少。

"Students can leave from the right side, as well as from the left side." Hua Chong stared at the display screen and said, "This monitoring is of little significance."

Liu Zhiqin pulled the progress bar backwards. After 10:[-], no one appeared on the monitor. Mr. Zeng and Jia Bing, who were still in the office at that time, must have gone downstairs from the left.

"Jia Bing is lecturing to the students in the classroom, with so many eyes staring at him, no one will lie." Hua Chong originally had one hand propped on the edge of the table next to Liu Zhiqin, but now he withdrew his hand, "I'll go to 20 Ben take a look."

The last class in the afternoon is English self-study. The classroom of Class 20 can be regarded as completely silent, and everyone is immersed in the papers.

The English teacher is a woman, Hua Chong explained her purpose, she nodded immediately, returned to the podium and clapped her hands, "Students, stop for a moment, the police are here to find out what happened before Teacher Jia disappeared, please cooperate with whoever you call later .”

Most of the students put down the pens in their hands, raised their heads and looked at Hua Chong, but some of them turned a deaf ear and kept their heads buried in the questions.

Hua Chong stood at the door of the classroom, glanced briefly at the students, cleared his throat, and asked in a tone that was not too serious but that people could not ignore: "Last Friday night, after the end of evening self-study, which classmate , asked Teacher Jia a question?"

There was a low-volume discussion in the classroom. Everyone looked at each other, as if they were confirming whether it was the other party.Gradually, more and more students turned to the boy in the plaid shirt sitting in the penultimate row, and he was looking down at the exercises on the table from the beginning to the end.

"Zhang Ban." The English teacher said, "Is that you?"

Hearing this, the boy in the plaid shirt raised his head, his eyes were confused - it seemed that he had been immersed in his homework just now and didn't hear Hua Chong's words.

"What?" he asked.

Hua Chong said, "After school last Friday, did Teacher Jia give you a lecture?"

Zhang Ban was stunned for a moment, then stood up, "Yes."

Hua Chong nodded and waved to him, "Please come out, I have a few questions I want to ask you."

The students started talking in low voices again.Zhang Ban seemed a little hesitant when he left his seat, and glanced at the English teacher as he passed the podium.

The English teacher said: "You can answer whatever the police ask. They also hope to find Teacher Jia as soon as possible."

Like many boys of this age, Zhang Ban habitually bows when standing.He glanced at Hua Chong, his gaze was a little wandering, "Teacher Jia did give me a lecture, but I don't know why he disappeared."

As he spoke, a drop of sweat rolled down Zhang Ban's forehead.

Hua Chong asked, "What's the question?"

"Just... a math problem." Zhang Ban lowered his head, rolling his eyes from side to side, "Well, it's a competition problem, and I didn't solve it during my evening self-study."

Hua Chong remembered that Jia Bing taught competitions in addition to mathematics, and asked, "Are you also a student in the competition class?"

"That's not true." Zhang Ban's voice lowered, he let go of his crossed hands, and turned his back.

"Huh?" Hua Chong raised his eyebrows, "Then why are you doing the competition questions?"

"I, our class is a science experiment class. Even if you don't take the competition class, you will still be exposed to the competition questions." Zhang Ban hesitated, "If you don't believe me, you can ask others."

Inquiring students is a very troublesome thing, not only to find possible clues in their words, but also to take into account their emotions.Hua Chong thought for a while, "Well, you can find the question you asked Mr. Jia that day and show it to me."

Only then did Zhang Ban raise his head, and pursed his lips hesitantly.

Hua Chong raised his chin slightly, his eyes quietly became sharp, "Is it inconvenient?"

Zhang Ban shook his head quickly, "Then wait for me, I'll go get it right away."

Putting it in front of Hua Chong was a collection of competition exercises written by No. [-] Middle School. Zhang Ban pointed to one of the questions and said, "This is what Teacher Jia taught me."

The problem set is a large book, not thick. The page that Zhang Ban turned to was filled with solutions to the problems in red and blue pens, and there were two pieces of draft paper sandwiched between them.

The handwriting on the draft paper is beautiful, but the handwriting on the notebook is flamboyant, and it can be seen that it was written by two people.

Hua Chong picked up the draft paper, "Is this Teacher Jia's problem-solving process?"

Zhang Ban nodded, "After the lecture, he also asked me a question, and asked me to infer other cases from one instance."

"That's why it was delayed until after 10 o'clock?"

"Yes, it is."

Hua Chong was silent for a moment, flipping through the exercise book, and suddenly frowned slightly.

Zhang Ban naturally didn't notice his subtle expression, and waited for a while and said, "Can I go back? I haven't finished my homework yet."

Hua Chong said: "Yes. But lend me this exercise book."

Zhang Ban said "ah", obviously unwilling.

Hua Chong glanced at him, "No way?"

"Okay, okay." Zhang Ban stepped back, "Take it, I'll borrow it from my classmates when I go back."

Looking at Zhang Ban's back, Hua Chong rolled up the exercise book unconsciously, his expression gradually turning cold.

Just now, he discovered a detail.

The page with the most notes in this exercise book is the page that Jia Bing explained to Zhang Ban. The questions before and after are all blank, and there is almost no trace of flipping through the whole book. Only the first 10 pages have sporadic handwriting on calculations.

That is to say, Zhang Ban has never done the problems in this exercise set at all, but suddenly jumped to page 43 last Friday night, found a problem that was considered complicated in the competition, and asked Jia Bing to explain it.

It takes a lot of time to solve the competition questions, but Jia Bing is a conscientious teacher for the students, and has the habit of inferring other cases from one instance. In this way, it will inevitably be delayed until after 10 o'clock and miss the school bus.

Did Zhang Ban do it on purpose?

The whole evening self-study is so long, students can go to the podium to ask questions to the teacher at any time, why wait until the get out of class bell rings?

"Flower team." At this time, Liu Zhiqin leaned out half of his body from the corner, "I have something to tell you."

Hua Chong walked over immediately, "Why?"

"I got Zhang Ban's performance ranking, and I just learned about his situation with other teachers." Liu Zhiqin said: "This is not a student who likes to ask questions to the teacher. Zhang Ban hovers at the bottom 20 to 5 in class 10. Every monthly exam is in danger of losing the regular class, and the physics teacher asked him to come to the office directly if he had any questions several times, but he never went there once."

Hua Chong crossed his arms, "So you think it's strange that he took the initiative to ask Jia Bing?"

Liu Zhiqin said: "I guess you are also thinking about this."

Hua Chong walked a few steps back and forth, "The teacher knows the students, and the students know the teachers. Zhang Ban knows that most of the teachers will go back to the city after Friday evening self-study. Jia Bing has no car. If he misses the school bus, he will have to Stay and go back to Shifeng Xiaoyuan alone."

"But there is another problem." Liu Zhiqin said: "If this is a prank by the students, how can we explain the other three missing teachers cases in Chuanming City?"

"Pay close attention to the students in Class 20, especially Zhang Ban, and the students who interact with him a lot." Hua Chong glanced at the time, and it was almost time for dinner.

When the special operations team came this time, they only had a meal on the plane, and when they arrived at the place, they investigated the case non-stop, without even taking a sip of water.

The taste of the plane meal is not good, the portion is pitifully small, no one is full, but the work is urgent, no one proposes to make up for lunch before everyone goes to their seats.

But it's a dedication to work so far, and it doesn't make sense to continue to hold on.

"Let's go to the cafeteria and have a meal." Hua Chong said, "Then go to Shifeng Xiaoyuan."

The surrounding area of ​​the new campus of No. [-] Middle School is very desolate, and the supporting business has not yet developed. The students can't go to eat outside the campus like in the old campus, and can only endure the cafeteria.

Fortunately, the canteens in the new campus are well-built. There are ordinary restaurants, small fried restaurants, and Western food restaurants. According to the school’s publicity, there will be Japanese and Korean restaurants, seafood and barbecue restaurants in the future.

Because of the disappearance of the teacher, there were many policemen coming and going in the new campus, and they all ate in the cafeteria. Hua Chong and Liu Zhiqin didn't seem obtrusive.

Xiaochao restaurant is quieter, Liu Zhiqin suggested to go to Xiaochao restaurant, but Hua Chong sat down in an ordinary restaurant on the grounds that there are many clues in crowded places.

But after 10 minutes, he regretted the decision a bit.

Because among more and more teachers and students dining, he saw a familiar figure, and that person obviously saw him too.

It was his father, Hua Linmao.

He didn't expect to meet Hua Linmao here. After all, at Hua Linmao's age, he should have retired a few years ago.

Hua Linmao came over with a plate, his hair was gray, but he was in good spirits, his eyes were surprised and pleased, "You, you're back?"

Liu Zhiqin looked at Hua Linmao calmly, then turned to Hua Chong.

"I'll investigate the case." Hua Chong looked very calm, "Sit down."

The cafeteria seats four, and there is no problem in sitting one more person.

Hua Linmao looked at the vacant seat, and made a movement of putting a plate in his hand, but finally chose the table next to him, and said with a somewhat embarrassed smile: "I'll sit here. I won't disturb you."

Hua Chong didn't say anything else, subconsciously speeding up his meal.

"I retired and was hired back again." Hua Linmao didn't eat a few mouthfuls before opening his mouth again, "I'm now leading the second grade of junior high school, so I followed to the new campus."

Hua Chong nodded, "Well, don't work too hard."

"It's not hard, it's not hard. I, I have taught for a lifetime, and it's hard to retire and stay at home." Hua Linmao smiled, "You young people should pay more attention to your health."

Hua Chong nodded again, "Yes."

Listening to the conversation between the father and son, Liu Zhiqin couldn't help but secretly sighed.

When Hua Chong was a child, he didn't get the love he longed for from his father. There is a folk saying that if you have a stepmother, you will have a stepfather.What Hua Linmao did back then would not be a stepfather, but anyway, in that newly formed family, Hua Chong had no place.At the most vulnerable and sensitive age, Hua Chong never felt the care of his family, so the gap between him and his father became thicker and thicker. Now, this gap has evolved into a calm and polite alienation.

Perhaps because he realized that a searching gaze was falling on him, Hua Linmao looked at Liu Zhiqin.

Liu Zhiqin raised the corner of his lips and smiled politely at him.

"Are you Hua Chong's colleague? Thank you for your hard work. You have come all the way from Los Angeles." Hua Linmao turned to Hua Chong with doubts in his eyes, "Hey, why are you investigating our case?"

Hua Chongxi finished the last mouthful of food, wiped his mouth with a tissue, "I'm not in Los Angeles right now."

"Ah? You transferred back?" Hua Linmao frowned, "It shouldn't be, we are a small place here."

Hua Chong didn't want to explain, so he got up and picked up the dinner plate, "We still have something to do, so let's go first, you should pay more attention recently, take the school bus to and from the new campus, don't act alone."

Hua Linmao raised his head blankly, hesitant to speak.

"The flower team is now transferred to the capital." Liu Zhiqin stayed behind and explained, "The case of the teacher's disappearance in Chuanming City has a relatively large impact, so we are here to help."

It was only then that Hua Linmao realized that he looked both proud and guilty. He was proud that his son was getting more and more promising and had already been transferred to the capital, but he was guilty because he, as a father, didn't know about such a big job transfer.

Liu Zhiqin was about to chase after Hua Chong, when he suddenly heard Hua Linmao say: "Young man, are you his partner?"

Liu Zhiqin's eyes curled up, "Yes."

Probably a colleague who has never met his son, let alone said anything similar, Hua Linmao seemed a little nervous, "He lives alone, and it is very hard. When he needs anything, please take care of him...you If you need help, he will take care of you."

Liu Zhiqin half-closed his eyes and said with a smile, "Don't worry, I will take good care of him."

Hua Chong waited at the entrance of the cafeteria for a while before he saw Liu Zhiqin walking quickly.

"What did you say?" Hua Chong asked.

Liu Zhiqin said slyly: "Your father entrusted me to take care of you."

Hua Chong looked sideways, "Take care of me?"

"I let him rest assured." Liu Zhiqin whispered: "Of course my baby will be taken care of by me."

Hua Chong smiled, knowing that Liu Zhiqin couldn't tell Hua Linmao about the latter sentence, but when he heard it suddenly, his heart suddenly became relaxed, like a clean wind blowing away, blowing away the scattered dust.

He always felt that he had completely bid farewell to the past, but meeting Hua Linmao without warning still reminded him of the unpleasant bits and pieces, no matter how light or shallow, they had existed before.

While standing here waiting for Liu Zhiqin, he faintly felt a little impetuous.But with one sentence from Liu Zhiqin, all the unhappiness and impetuousness were easily resolved.

Hua Chong walked forward, "Who is the baby?"

Liu Zhiqin didn't hear clearly, "Huh? What are you mumbling about?"

"It's nothing."

"I obviously heard you talking."

"Blame your deafness."

"..."

Last time it was fake hearing loss, this time it is real hearing loss?

Haizi has arrived at Shifeng Xiaoyuan before the two of them, and is currently at Jia Bing's home in Building 5, 3-2.

Although the community was funded and built by No. [-] Middle School, it is a commodity house and was sold out as early as the opening. The buyers took a fancy to the development trend of the "Learning City" and bought the house at a low price for investment.

However, the occupancy rate and redecoration rate of the community are very low. Only 12 households in Jia Bing's unit have been redecorated on the basis of the original house, and there are even fewer permanent residents, only 5 people including Jia Bing.

Due to the small number of permanent residents, the community has not yet signed a contract with a formal property management company, and the security facilities are not in place. However, because it is located in a remote area and is next to a school, no security incidents occurred before Jia Bing disappeared.

"I've done the preliminary trace extraction." Hai Zi sent out shoe covers to Hua Chong and Liu Zhiqin, "There are only Jia Bing's footprints and fingerprints in the room, and there are hairs falling out in the bathroom and bedroom. No outsiders have been here in the short term." Here. In addition, the trash cans in the kitchen, bathroom, and balcony are all empty without garbage bags, which means that Jia Bing took out all the trash before going to work on Friday. The only food in the refrigerator is an unopened carton of milk , the windows and curtains of all rooms are tightly closed, except for the refrigerator, all electrical plugs have been unplugged.”

Hua Chong walked from the living room to the bedroom, and took a quick look at the house.

For the convenience of the teachers, Shifeng Xiaoyuan's house has been fully renovated, and they move in with their bags.If you want to decorate yourself, you can also destroy it and start over.

3-2 is two bedrooms and one living room, without redecoration, everything is practical, and the selected home appliances and furniture are all cost-effective.The bedroom has only a bed and a whole wall of cabinets, while the other room has no furniture.

Judging from the layout of the room alone, Jia Bing is not rich, and the down payment may cause him "big injury", so he can only choose simple and simple home appliances.

"It's similar to what we learned at school." Hua Chong walked around, went back to the kitchen, and took out the milk in the refrigerator to have a look, "Before being dragged away by the students, Jia Bing originally planned to take the school bus back to the city. Otherwise, he would not have dumped all the garbage, locked the windows, and cut off the power to the electrical appliances. Because he missed the school bus and didn’t want to take Teacher Zeng’s car, he changed his plan and went back to Shifeng Xiaoyuan.”

Hai Zi said: "Then something happened on the way back!"

The surveillance outside the west gate of the new campus of No. 5 Middle School captured Jia Bing at 2:10 p.m. on May 37. This was the last time he appeared on the camera, and there were no other people around him at that time.

The Chuanming police have determined that Jia Bing did not take the main road, but took a small road.There is no surveillance inside and outside this small road, and there are farmhouses not far away. When native farmers go to the market, they like to pass by the small road.

The sun was setting, and the sky was gradually getting dark. The only three street lights in the small road were lit up, dim and dim.

"Jia Bing was most likely attacked on this road and then taken away." Hua Chong squatted on the ground, looking at the intersecting ruts. For two days on weekends, farmers kept passing by on scooters. The ruts are these scooters stay.

Since many people passed by during the day, the traces that Jia Bing may have left when he was attacked have been covered.

In the middle of the road and on both sides, there are silt shaking from the carts, winding and criss-crossing each other.Hua Chong looked along the mud for a while and noticed half a footprint.

"Hai Zi." He said, "Come here."

Haizi immediately ran over, "Flower team, what's the matter?"

"This half footprint, can you tell what kind of shoe it is?" Hua Chong said, pointing around, "I think this shoe print is quite different from the others."

Most of the people who pass by the path are farmers living nearby. Their shoe patterns are relatively simple, but the half footprint is somewhat special, and the texture is designed.

While Haizi was expanding his footprints, Hua Chong received a call from Liu Zhiqin.

"I just checked the surveillance in the boys' dormitory, and found that on Friday night, Zhang Ban didn't go back to the dormitory at all."