"Boss, I've found it!" Xie Wencong shouted excitedly.

Everyone gathered in front of the computer together, only to see a private post called "Endless Learning" displayed on the screen. At first glance, it is full of very positive and positive speeches and headlines. The members of Tieba publish each other's questions in their studies and answer each other's questions. And to view and answer these questions, you not only have to become a premium member, but also pay a certain fee. At this time, Xie Wencong opened the title "How to use the Pythagorean theorem to calculate the height of Maofeng Mountain".

"It's okay, you can find out if you look it up on the map! That's interesting, that's what you found? Xu Ranran complained with some disappointment.

"Wait a minute." I saw Xie Wencong's fingers quickly knock on the keyboard a few times, and the post was opened, which actually described in detail the deceased's clothing, appearance, height, weight, measurements, place of death and even the identity background of the deceased.

The deceased's name was Liu Yiyi, and she was a high-ranking peripheral girl in the 'Supreme' private club.

"Any other posts?" Xiao Rongzheng asked.

"This is the only post on this post so far, and this post has been encrypted layer by layer, and ordinary netizens will not easily see it."

Xu Ranran asked with some confusion, "Don't you think it's strange, even if the murderer wants to have the pleasure of fighting with the police, as long as the location is announced, why do you need to have appearance and measurements?" ”。

"Ran Ran, do you remember the case of the disappearance of the general teacher of Southwest Medical College that was solved three months ago?" Xiao Rongzheng frowned, and suddenly spoke as he watched the words on the screen.

"Boss, are you saying that this post bar has something to do with that case three months ago?"

"Yes, do you remember what kind of corpse disappeared at that time?"

"It's a woman, and I've investigated her when she was alive, and she's still good-looking. Alas, it's a pity that such a good person has encountered such a ......" Xu Ranran said, paused suddenly, and then looked at Xiao Rongzheng with a sudden realization.

"You're going to Prison No. 2 in the afternoon! Before that, we have to investigate who Liu Yiyi had contact with before her death. After speaking, Xiao Rongzheng turned around and walked out of the office quickly.

On the rooftop, there was a breeze blowing, blowing Xiao Rongzheng's sweaty face. He took out a wet tissue from his trouser pocket and wiped it, the packaging of which had the faint sweetness of citrus, and he remembered the girl who had been smiling faintly on her face in the morning.

He lit a cigarette, but didn't put it in his mouth, but just held it between the index and middle fingers of his left hand and let it burn. He sat on the steps of the rooftop in the smoke, staring at the traffic downstairs in a daze. It's not so much a daze, but it's actually more like going through the cases of the last few months in my head. It seems that from the corpse theft case three months ago, to the deceased named Mei Mei last week, to now. It seems to be three completely independent cases, but there are too many doubts and connections. Xiao Rongzheng rubbed his temples, and he had a faint sense of foreboding in his heart.

"Boss, the results of the forensic autopsy are out." Xie Wencong opened the door of the rooftop and peeked out from inside.

"Here we are." Xiao Rongzheng quickly extinguished the cigarette in his hand on the ground, took out the cigarette case from his pocket, and stuffed the remaining small half into the box again.

When Xie Wencong saw him like this, he teased a little funny, "I don't know, if I see you like this, I still think you have a big addiction to smoking." Who would have thought that you would just use them as aromatherapy. Did you hear that girls like men who smell of tobacco, and that's why you did that? ”

"Hey, I said Lao Xie, when is it, it's still so indecent." After saying that, he made a gesture to kick him.

Seeing this, Xie Wencong hurriedly closed the door, and shouted at the top of his voice as he ran, "Oh, Lao Xiao, the gentleman doesn't move his mouth!" No kidding you, let's go. ”

Appraisal opinion:

The deceased, Liu Yiyi, died of myocardial infarction caused by a large amount of air entering the heart with blood.

"This way of dying is what we commonly call the air needle. The deceased had eight intravenous syringe pinholes in his arm and lower back and had just undergone sterilization. It is very likely that the air entered the veins of the deceased through these pinholes and thus entered the heart. The deceased had multiple abrasions on his body, and the largest wound was 10 centimeters to the right of the deceased's lower abdomen, which can be confirmed to have been scratched by the edges and corners of the rocks. However, judging from the only small dark red blood stain at the scene, the wound was left after the deceased's death.

From the appearance of putrefactive green spots on the deceased's body and the translucent cornea, it can be concluded that the deceased had been dead for about 24 hours. The preliminary judgment is that the time of death was between 3 a.m. and 6 a.m. on September 24, that is, yesterday. Moreover, the deceased had undergone breast augmentation surgery before his death. ”

The forensic doctor said as Xiao Rongzheng wrote something on the whiteboard. After a while, a comparison chart appeared in front of everyone's eyes.

"The deceased Liu Yiyi and the deceased Mei Mei died a week ago of myocardial infarction caused by a large amount of air in the blood, and both had sterilization. I think it's very likely that the murderer in these two cases is the same person. ”

"Serial murders?" Xu Ranran asked incredulously.

"Yes, and it is not ruled out that the murderer will continue to commit crimes. So we now need to have the profile of the offender to narrow it down. Lao Xie, please contact Professor Wang Minzhi, she is the most famous expert in criminal psychology. Ranran, can you ask the stone how they are doing? ”

"Boss, Professor Wang said that she was giving a lecture in the field and couldn't come back for a while, so she asked her student to come over as our consultant, a doctor." Xie Wencong hung up the phone and looked at Xiao Rongzheng with some indescribable words. After hearing this, Xiao Rongzheng couldn't help but raise his eyebrows and think for a while, with visible disgust on his face, and then said reluctantly.

"Okay, you can take a good look at that doctor when you do, but don't let him make trouble for us without helping."

"Guaranteed to complete the mission!"

Cheng Han wrote the paper for a while and felt a little hungry, so he asked the old couple for their opinion and got up and went to the kitchen to get busy. She kneaded the dough, made the filling, and took advantage of the awakening time to open her work mailbox at the bilingual experimental school in City A. In order to write a research paper, she used her free time to help children with psychological counseling at that school.

An email popped up, and the sender was a third-grade boy named Li Ziqi. Cheng Han had an impression of him, because she had heard their teacher talk about this child when she went to school. said that the family background is very good, but the parents are very busy, and the temper of being spoiled by the grandparents is too big. I really don't know what kind of email this kid will send to himself.

Dear Teacher Cheng,

Hello

I'm Li Ziqi from the second class of the third grade. You said at the opening ceremony that if we were unhappy, we could send you an email, then I'm welcome. I just think I've been unhappy lately, my classmates seem to hate me, and I'm fine when I bring them snacks. However, there were days when I didn't bring snacks, no one came to talk to me, no one played with me after class, and no one came to go home with me after school.

I feel like I'm so unhappy that I don't have the carefree of first and second grade anymore. Teacher Cheng, can you tell me how to start over (re, children's typos) and be happy?

Looking at the childish words on the computer, with typos and the bitterness between the lines, Cheng Han couldn't help but laugh. However, children who are well-off and overly spoiled tend to lack reverence for morality and the law in adulthood if they are not well guided. Because they will feel that they have made a mistake, and there will always be someone to help them sort it out. It's like after a fall, they don't feel that they are not walking steadily, but that the road is a problem.

Cheng Han is very happy that this child can take the initiative to send an email to his psychological counselor, which shows that he is still a good child in nature. She thought about it for a moment and began typing on the keyboard.

Dear Li Ziqi,

Hello

Teacher, we are glad to hear from you. For the troubles you said, the teacher has helped you think of a solution, you can try it first. True friendship is not maintained by snacks, but by sincerity and dedication to each other.

The teacher first wants you to observe the classmates you think you have a good relationship with and see how they get along. Then, the teacher wants you to count to five every time you want to lose your temper with your classmates and think about whether the tantrum will solve the problem. In the end, the teacher suggested that Ziqi could bring snacks to school in the future, but try to chat with his classmates, take note of what his classmates say to you, and be a good listener. And, when your classmates need help, reach out and help them.

Make friends, everyone is sincere for sincere. You've experienced firsthand that friendships bought with snacks don't last long when you don't have snacks, right?

Hopefully, these will bring you back to the carefree days of first and second grade.

Teacher Cheng

Cheng Han replied to the email with a smile, got up and took an apron printed with R2D2's cute robot on it, and went to the kitchen to cook the box, carrot vermicelli egg filling. In fact, she originally wanted to make leek, egg and shrimp, but she felt that Xu Ranran had been overusing her eyes recently, so she decided to use carrots to supplement her with vitamin A.

Just as she was turning the pancakes with a spatula, her phone rang.

"Hey, teacher. How was your lecture going? ”

"The lecture is about to start in twenty minutes. Han, I have something on my side that I need you to help me go. ”

"Teacher, you say."

"The Criminal Investigation Brigade of City A just contacted me and wanted me to help them with the crime profile. Isn't it like I can't leave, as my student, you can go for me, just take this opportunity to practice. ”

"Criminal Investigation Brigade? Isn't that where Xu Ranran is? ”

"That's right, you and Ran Ran can work together and take care of each other."

"No problem, no problem, but I'm going to go to the bilingual experimental school for psychological counseling next week, what should I do if it's too late?"

"Oh, that's hard to say. I'll be back next week, so I'll just be able to tutor you then. I'm familiar with their principal, so just say hello in advance. That's all right! By the way, Ah Han, remember to write your paper when you have time, don't forget! ”

"Okay, don't worry."

After hanging up the phone, Cheng Han looked at the vegetable box that had just come out of the pot, fried golden and crispy, and steaming. picked out a few old couples who were left at home, and mixed a plate of old vinegared peanuts for them to appetize, and the rest were packed into an insulated lunch box. The fragrant vegetable boxes are stacked neatly and orderly, filling the lunch boxes to the brim. She walked to the entrance with her lunch box and shouted at the old couple who were still in the house while putting on her shoes.

"Mom and Dad, I have a job to go out, the meal is ready, you remember to eat it while it's hot."

"Are you still home tonight? We're waiting for you to come back for dinner? The old couple came out of the room and asked with some concern.

"It's okay, I'm probably going to be busy for a while. During this time, I will stay in my own apartment first, and I will not come back too late to disturb your rest. Okay, let's go eat, don't worry. Cheng Han put on his shoes, got up and hugged the old couple gently, and then left in a hurry.

As soon as he got out of the car, Cheng Han saw a tall and thin policeman looking around at the entrance of the police station, raising his hand to look at the watch on his wrist, as if he was waiting for someone. She didn't pay much attention to it, and went straight to the guardhouse to show her ID.

"Hello comrade, I was sent by Professor Wang Minzhi to help you solve the case."

"You're the doctor!" Before the people in the guardhouse could react, the tall and thin police comrade ran over and said excitedly.

Cheng Han nodded yes, and was dragged into the door by the other party.

"Professor Wang said that he wanted a doctor, but he didn't expect a female doctor to come!" Hearing this, Cheng Han raised his eyebrows slightly, raised his eyes and looked at the policeman and asked.

"What's wrong with the female doctor?"

"You see, I don't mean anything else, it's just a surprise. Oh, look at it, how can the little girl's family carry such a big lunch box, come on, come on, I'll help you take it first. After speaking, he took the lunch box in Cheng Han's hand, shrunk his neck, and walked quickly to the office.

As soon as he entered the door of the office, he saw the comparison chart of the two cases on the whiteboard in the middle and the relationship between the two deceased before his death.

"Hey, you, who let you in, get out quickly! How are you? Xiao Rongzheng went to wash his face, and when he came back, he saw a somewhat strange and familiar figure standing in front of the whiteboard, and hurriedly spoke, but when he found out that it was Cheng Han, his originally fierce tone suddenly turned around, resulting in a little broken sound.

"Officer Xiao, meet again." Cheng Han looked at the man who was fierce to her twice, raised the corners of his mouth slightly, as if smiling, but his eyes looked him up and down.

It seems that this man has just washed his face, and the water on his face has not come to dry it in a hurry and hurried back, and even his short inch has water droplets on it. Without the muddy face on Maofeng Mountain in the morning, looking at Xiao Rongzheng's appearance at this moment, Cheng Han couldn't help but think of what Ms. Lu Wenjin said, a boy with thick eyebrows and big eyes, good looks and a righteous body is afraid that this is what it looks like.

"Boss, this is what Professor Wang sent to help us do psychological profiling, that doctor!" Xie Wencong put the lunch box on the table, sniffed it, and sighed, it was so fragrant.

Xiao Rongzheng took a tissue and wiped the water droplets on his face, and said, "I'm talking about it in front of me, if you don't have any experience, you can leave immediately, and I won't say anything to Professor Wang, and the province will leave us to make trouble." If there's something going on, we can't care about you! ”

"Boss, what you're saying is a bit disrespectful!" Xu Ranran didn't know when she came back, and when she heard this, she was a little angry and dragged Cheng Han to her side, pinched her waist, and glared at Xiao Rongzheng angrily.

Cheng Han didn't care, pulled Xu Ranran to the table, first took out disinfectant wipes from her backpack and asked her to wipe her hands, and then opened the lid of the lunch box.

For a moment, the aroma of the vegetable box spread, and the others remembered that they hadn't eaten yet. Smelling the fragrance, his stomach began to sing about the empty city.

Cheng Han listened to everyone's gurgling stomachs, and just smiled slightly, "I brought a lot of food here, and comrades who haven't eaten can come over to eat some to pad their stomachs." ”

She sat down with Xu Ranran, wrapped four vegetable boxes in tissues and handed them to Xie Wencong on the side, turned her head and said to Xiao Rongzheng.

"Officer Xiao can eat some if he doesn't dislike it. As for me, it's true that my ability is limited, but you can show me the existing information first, and I'll tell you. If you think it's okay, let's be colleagues for a while, and if not, you'll treat me as a deliverer. ”

Xie Wencong saw that the atmosphere between the two was a little tense, and reached out and handed a vegetable box to Xiao Rongzheng's mouth. The man opened his mouth and took a bite, nodded, and thanked Cheng Han.

Cheng Han smiled, gave the worried Xu Ranran a reassuring look, and looked at all the information.

The office was filled with the smell of vegetable boxes, everyone was eating quietly, and no one was talking except for the sound of chewing. Xiao Rongzheng had already eaten five, and seeing that there was still the last one left in the lunch box, he and Xie Wencong reached out at the same time. The two of them pouted and stared at each other for a while, and finally reluctantly split into two from the middle, one and a half.

"Officer Xiao, have you eaten well?" Cheng Han suddenly asked, which made Xiao Rongzheng, who hadn't had time to swallow the last bite, choke and began to giggle.

He drank a large glass of water, cleared his throat, and said two words with a change of face, "Okay." ”

"Then I'm here I go! Judging from the modus operandi of the crime and the actual circumstances of the two deceased, the two cases were indeed committed by the same person. And this person can be preliminarily identified as a man, twenty-three to thirty-five years old, grew up in a single-parent family, has a strong revenge psychology against women, has a certain medical background, and is proficient in medical science, and has a certain social wealth base. ”