[The number of chapters is wrong...... It should be Chapter 79...... Don't be stupid...... Boom ......]

"And what about Wan Qian's time of death? She must have eaten it in her room after she got it home, right? If the drug is so powerful, it won't take a long time to attack, right? Or even if she eats early and has an early seizure, her parents haven't slept yet, and if they find it in time, they won't be able to be saved. Fang Yuan was slightly surprised, "Actually, if you say that, this murderer is bold enough, he actually gave the 'spiced' cake to Wan Qian so directly, isn't he afraid of extraneous branches?" What if Wan Qian gave the cake to someone else? In case Wan Qian's family has a pet dog, and she feeds the puppies with cakes and the like, won't it be exposed? ”

"The time of death was more than two o'clock in the morning, and it is speculated that it should be in the middle of the night, when I was hungry, I opened the cake and ate it, and then I was hit. Poisoned. Therefore, the murderer still has a certain understanding of Wan Qian, combined with Wan Qian's age and the details of not living in school, the murderer may not have a deep understanding of Wan Qian's family situation, but at least he has figured out Wan Qian's personality characteristics, so he is sure that Wan Qian will accept what he gives and will definitely eat it himself. Dai Xu said his opinion to Fang Yuan, and then temporarily put down the autopsy results, and instead mentioned the handwriting identification, "We also confirmed the handwriting identification by the way, after identification, the handwriting on the note does not match his own on Zhang Chao's homework book, it should not be from the same person's handwriting, and the focus of writing is very obvious." Does not conform to the writing habits of the same person. On the contrary, the words on the note are different from those on Duan Feiyu's letter from home, although they still look slightly different. However, the actual writing habits are indeed very consistent, and it can be judged that they were written by the same person. ”

"Sandwiched in the student's weekly notebook, then this person must be in the school, so either he is a student in the class, or he can often go in and out of Mr. Deng's office, and can come into contact with other teachers or students who can contact Mr. Deng's desk without being suspicious." Fang Yuan thought for a moment and made a judgment.

"That note. It is written with the left hand. Tonic added in due course.

Fang Yuan was stunned for a moment, as if he had thought of something, and felt as if he was separated by a layer of gauze. It's not very clear.

"Actually, if you think about it, this case, if the murderer wants to say that he is cunning, he really can't be regarded as cunning." Dai Xu sighed. "It can only be said that this person is still a little smart, and he can accurately find the weaknesses of the three victims, and make moves against their weaknesses, so he can succeed repeatedly."

Fang Yuan thought for a moment: "Ke Xiaowen's weakness is that he has a weak personality, doesn't he dare to fight for or defend his own interests?" Duan Feiyu's weaknesses...... He has an eccentric personality, is easily irritated, and has a tendency to self-harm and self-abuse. Is this Duan Feiyu's biggest weakness? Needless to say, Wan Qian has a bit of greed in her character. For the suitor of dedication, although she obviously doesn't like it, she doesn't want to refuse the benefits that the other party can provide her, from helping to run errands and buy things, to sending trinkets, drinks and snacks, she has done a lot of this kind of thing, and it is estimated that the murderer should have had the experience of being accepted by courtesy, so she will be so assured and bold to implement the plan. ”

"What you said is also right and not right, Wan Qian's part has no objections, but as for what Ke Xiaowen and Duan Feiyu's weaknesses are, there is no problem with what you said, but I didn't think of the most fatal weakness that they were used by the murderer." Dai Xu shook his head at Fang Yuan, this time not affirming the answer she gave.

Fang Yuan was stunned for a moment, and seriously pondered the first two victims of this case, Ke Xiaowen and Duan Feiyu, in addition to being classmates, could hardly find anything else in common, although Ke Xiaowen should be the second victim according to the actual time of death, but he was also the first person who was discovered by them, appeared in their field of vision, and triggered a series of investigations in this case, so for Ke Xiaowen's personality as a whole, as well as some situations in his life, Including the family, perhaps they have the most clear grasp, Ke Xiaowen has a submissive personality trait whether it is internally or externally, to his elders or to Wu Xuehai and others of his generation, even if he is bullied a lot, he will never give birth to the slightest rebellion, he will only retreat, retreat again, and hope that he can get ahead in the future, become independent financially and in life, and get rid of the original crowd.

And Duan Feiyu just went to the other extreme, his personality is more eccentric, and moody, whether it is his parents or classmates, they are afraid of him, and dare not provoke him easily, although he does not have much record of taking the initiative to attack others, but this kind of unpredictable, moody, and angry will choose to self-harm behavior, may be more fearful than a simple bad temper.

Such two people, but they were both chosen by the murderer and became victims of this series of murders, they are different from Wan Qian, from the note received by Mr. Deng revealing Wan Qian's early love and the forged letter of Duan Feiyu's running away from home from the same person, it can be seen that the connection of the case can be seen, and from the murderer's intentions, it is not difficult to conclude that the murderer's hatred for Wan Qian is completely different from Ke Xiaowen and Duan Feiyu, of course, this can also be slightly guessed from the gender. Then Ke Xiaowen and Duan Feiyu were selected at the same time, which naturally means that they still have some kind of commonality.

So what do they have in common? Fang Yuan thought about it, the most intuitive answer was probably the qualification for the university's independent enrollment, maybe for people who have already entered the workplace, although this kind of thing is important, but if you need to take a big risk, or pay a big price, then it is not very worthwhile. But for a student who is in his third year of high school, this incident may have a big impact and a lifelong impact.

"Is it about the eligibility for independent admissions?" Fang Yuan felt that he had found the key this time.

Who knows, Dai Xu still shook his head. And looked at her with some wonder and asked, "What's wrong with you today?" I usually feel that the analysis problem is quite bloody and to the point. Why can't you grasp the key point today? ”

Fang Yuan blushed slightly, in front of Tang Li, she couldn't say anything, in fact, when Dai Xu said this, she did have a very weak feeling, although she tried very hard to focus on the case, not allowing herself to be distracted by anything else. However, Fang Cai's distractions still had a significant impact on her thoughts, and there was no way to concentrate as usual. It's just that I can't admit this in front of Tonic in front of it. Even if Tang Li was not present, there were only two people now, her and Dai Xu, and she also had no face to say.

From a selfish point of view, it is a matter of a girl's self-esteem. In addition, objectively speaking. Because private matters are involved, resulting in insufficient concentration and inaccurate consideration of problems, this is not a glorious thing, indicating that I still can't be professional enough, and my personality is not mature enough.

Fortunately, Dai Xu only casually wondered, and Tonic was not a person who liked to follow the trend and coax to pick up the conversation, so no one was really ready to delve into Fang Yuan's abnormality. This can also be regarded as Fang Yuan's luck, if he follows them out of the scene today. The person who dealt with this matter together was not Tang Li, it was Tang Hongye, so she could bear it.

Dai Xu looked at Fang Yuan's expression a little embarrassed, didn't say anything, and continued to talk about the deceased: "This matter, I think that the matter of the examination qualification for independent enrollment is really just a cover, because the two victims are qualified candidates, so as long as this matter is brought out, everyone will immediately think that the murderer's purpose may be to exclude dissidents from the competition in this matter." At the beginning, we found that Duan Feiyu's whereabouts were unknown, didn't we also have such suspicions. But if you think about it carefully, it is not difficult to find that this is unreasonable, because the pertinence is too strong, and the purpose is also very clear, if the murderer gets rid of Duan Feiyu and Ke Xiaowen, it is to remove obstacles and make himself eligible to participate in the independent enrollment exam, which is also too simple. After all, the students in the mobile key class, pull out one at random, even if it is the lowest ranking in the class, they can still be deservedly counted as top students in the whole grade, how can the murderer ensure that after Ke Xiaowen and Duan Feiyu die, they will not be replaced by others, but must be himself? ”

"In addition, if the murderer really wants to replace him for such a purpose, and he does have such self-confidence, then it is too stupid to do it to Ke Xiaowen and Duan Feiyu. Isn't a replacement that everyone thinks is reasonable, a clear target and suspicion? ”

Fang Yuan thought about it like this, it was indeed too obvious, unless the murderer wanted to throw himself into the net, otherwise it would really not be enough to do so: "Indeed, what the murderer needs is a smoke bomb, not a flare, if the motive for the crime is obvious to such an extent, then it is estimated that he will not be able to think of creating the illusion that Duan Feiyu ran away from home, and want to mislead us to treat Duan Feiyu as a criminal suspect." ”

"Yes, so then again, the main reason why you haven't talked about the point just now is probably that you have confused the superficial motive with the victim's weakness. The so-called weakness is naturally the most important factor that can make the murderer succeed. Dai Xu said, "If it's just Ke Xiaowen and says that he is cowardly and indisputable, this is also reasonable, after all, a cowardly person, in the face of other people's threats, even if he fights, the probability is much smaller than that of a person with a strong personality." But if you take this as a weakness, it obviously doesn't make sense in Duan Feiyu, Duan Feiyu's obedient personality is difficult to find an entry point from the character itself. ”

Fang Yuan was reminded by him like this, she seemed to have an understanding, she quickly thought for a while, and suddenly enlightened: "I understand, both of them have a common weakness, we have actually heard people mention this over and over again during the investigation, but the matter of the quota for the independent entrance examination is too conspicuous, but it makes people ignore such a common point between the two of them." Ke Xiaowen and Duan Feiyu, they are very eager to improve their grades, and both of them have encountered certain bottlenecks in this regard. Ke Xiaowen is steady and steady, although his grades are relatively stable, but his mind may not be particularly smart, so there is only stability left, and there has been nothing better to look at. Duan Feiyu is more extreme, judging from the situation we have, his mind should still be quite good, that is, he is completely in the state type, once there is any pressure, or mood swings, the ups and downs of academic performance are very large, so the grades are not very ideal. ”

Dai Xu snapped his fingers and smiled: "Yes, this is the weakness I am talking about, so because of this urgent desire to improve their grades, Ke Xiaowen and Duan Feiyu are very likely to provide opportunities for the murderer to take advantage of, so that the murderer can find a loophole that can coax them and let them be fooled." ”

Duan Feiyu's stomach contains drink ingredients, indicating that the murderer may have hidden the poison in the drink and tricked Duan Feiyu into drinking it when he didn't know it. But Ke Xiaowen is injecting hydrogen peroxide...... "Tonic seems to have a little problem and hasn't figured it out, so there is a faint doubt in his tone."

Dai Xu nodded: "Yes, Ke Xiaowen, if you look at it alone, it is definitely very confusing, when we only found him as a victim, we even had doubts about his stepmother Wu Shuqin because of syringes and hydrogen peroxide, after all, Wu Shuqin's profession is a nurse, and there was a history of not very good behavior, but later with the appearance of Duan Feiyu and Wan Qian, I realized that in fact, syringes and hydrogen peroxide are very easy to obtain. I went to the outside pharmacies to try to buy them, and some of the more regular pharmacies didn't dare to sell syringes to me easily, for fear that I would use them for other purposes, but most small pharmacies sold them without asking. Not to mention hydrogen peroxide, it is very easy to buy, so in this way, the previous suspicion of Wu Shuqin can be reversed. As for you saying that he was injected, is it possible that he was also coaxed...... We're going to have to work backwards. ”

Fang Yuan and Tang Li both looked at Dai Xu, waiting for him to continue, Dai Xu took a sip of water and said unhurriedly: "Wan Qian needless to say, she definitely doesn't know that the cake is poisonous, so she will eat it with confidence." Duan Feiyu is a very illustrative person, Forensic Doctor Liu said that Duan Feiyu's poisoning incident was earlier than the time of death, the antifreeze was not so strongly toxic, and the lethal rate was not fast, from the fact that after Duan Feiyu's death, there was still a drink mixed with antifreeze in his stomach, it can be judged that after he was poisoned for a period of time, he was fed poison by the murderer for the second time, and Duan Feiyu did not have any traces of resistance and struggle, what does this mean? (To be continued......)