Shao Dong said the inference from Wu Wei:

First, the time span between the last crime more than 20 years ago is too long, and the possibility of the murderer committing the crime is decreasing indefinitely.

Second, there is a clear difference between Xu Ping's murder case and several cases in the past twenty or thirty years, and the murderer's modus operandi has changed.

Third, it is clear that Xu Ping was tortured more before his death than the victims of several cases twenty or thirty years ago.

Fourth, the commonality of the so-called several cases, the most relevant thing that can connect several cases together is that the death knell was sounded inexplicably, but there was a long time between Xu Ping's murder and the death knell was sounded. Maybe the murderer twenty or thirty years ago deliberately did this after learning that Xu Ping was dead, but it is not known.

Fifth, and most importantly, if the murderer was the murderer of those cases twenty or thirty years ago, then today, this murderer is at least 50 years old, or even older, even if the rural people can keep up with their physical strength, but the wisdom of this crime is also advancing with the times? You must know that the police did not find the slightest clue at the scene of the crime where Xu Ping was killed.

If you look at it this way, it does tell you something. Zhang Qiang said: "After all, the time span is too long, and the differences in criminal methods are all problems, if you must say that it is not the same murderer, there is enough theoretical support, but what is the final result, it still depends on the evidence orientation." ”

In fact, it is not difficult to see from Zhang Qiang's words that he personally agrees with Wu Wei's opinion, but now there is no evidence to support the entire inference, and the theoretical establishment alone is still not enough in the process of handling the case, unless there is no clue at all, the theory can become the direction of the case, so he is a little cautious in his speech.

Of course, some people support it and some people oppose it, such as Wang Gang, who pondered for a moment and said, "This doesn't mean anything. Let's think about it another way, what if in the past few decades, the murderer has learned some criminal techniques through certain things? In these years, the development of the Internet has surpassed the resemblance of human beings, and people can learn a lot from television, books, and newspapers.

The most important thing is that in today's environment, with the blessing of science and technology, if you still want to do the simple and easy accident he did twenty or thirty years ago, it is obviously impossible, unless it is a natural and man-made disaster, but the person who can use natural and man-made disasters to achieve perfect crimes is definitely not an ordinary person, so it is completely reasonable for him to choose another way to commit murder now.

As for the so-called time span, in fact, this is not difficult to understand, after all, in the past twenty years, the murderer has indeed achieved his criminal purpose, and the sudden closeness of Xu Ping and Xu Laohan made him feel threatened, or rather, it was a blasphemy against his criminal purpose, so it is understandable that he committed the crime again. ”

Regarding Wang Gang's point of view, Shao Dong is in favor of it, and he also believes that it is not incomprehensible that the murderer has upgraded his criminal methods.

After all, it has been more than 20 years since the last crime, so it is normal for the murderer to learn something in the past 20 years or so, and he added at the moment: "In fact, if we carefully analyze this case, it is not difficult to find that the murderer has been a progressive process from the first time he committed the crime to the present, and he is constantly improving his criminal methods."

For example, in the first case, the victim was Xu Laohan's father, he begged for an accident, and used an uncommon poisonous snake, Mangshan soldering iron head, we temporarily analyze the reason why he chose this poisonous snake as a tool to commit the crime is because this poisonous snake is uncommon, and the antivenom serum was not studied at that time.

In fact, if you look at it now, his criminal methods are quite low-end, it can be said that it is full of loopholes, but people in that era were simple-minded, I heard that they were bitten by snakes, and subconsciously thought that it was an accident, if this is the case of people now, they will pursue at least two questions, first, what kind of snake, second, where did the snake come from.

However, as long as these two issues are investigated, there are doubts in this case, and once there are doubts, it will not be easily concluded that it is an accident.

Let's take a look at the second case, Xu Laohan's mother, who died when the wooden bridge suddenly broke and fell into the rising river.

It can be said that in this case, the murderer's modus operandi is much more clever, at least he used natural and man-made disasters to cleverly embed the case into the accident, which is much more clever than the previous case, even today, if there is no monitoring of these high-tech things to assist, it is difficult to find clues.

But if you really want to talk about it, there are still loopholes in this case. For example, why did the wooden bridge suddenly break, someone must have done something to do it, and if you really want to take the remnants of the wooden bridge back for inspection, you can still find some clues, or that sentence, the concept problem, the concept of that era is like this.

Then, let's take a look at the death of Xu Laohan and his wife.

Xu Laohan and his wife died in childbirth, and died after giving birth to Xu Ping.

This case is much smarter, at least inside and out have revealed the accident, the irresistible meaning of manpower, if it weren't for the death knell of Xihe Village after the death of Xu Laohan's wife, I would believe that she really died of dystocia, but now it seems that it is very likely not, although it is not easy to do all this, it does not mean that there is no way.

Through this case, we can only prove that the murderer's methods are getting cleaner and neater.

Finally, let's take a look at Xu Ping's case, so far, as far as the crime scene is concerned, we have not found any clues worthy of attention, and to put it bluntly, we do not have any human and physical evidence except for some theoretical inferences.

It can be said that the murderer's crime this time is very beautiful, almost on the verge of a perfect crime.

Looking at the four cases, we can come to a conclusion that the murderer's modus operandi has actually been improving and improving.

In previous cases, he always found some experience, so that he was able to carry out crimes more and more perfectly.

Therefore, whether it is the time span or the difference in the murderer's modus operandi, it doesn't actually explain anything. If there is really one problem, then it can only be one problem, that is, the murderer's modus operandi has been improving, perfecting, and progressing, which is a very bad phenomenon.

If he commits the crime again, I'm sure he'll do even better, even so that we can't find any clues, including his motives.

As for the death knell being sounded, this question is easy to explain, because in the past three cases, it is not the death knell that rings immediately once the victim is killed, and I speculate that it is not a simple matter for the murderer to ring the death knell, after all, the death knell pavilion is guarded 24 hours a day all year round, and he must make some preparations to do it, which is not difficult to understand.

In the end, that is, the age of the murderer and the torture Xu Ping received before his death, in fact, it is also very easy to explain, first of all, the murderer actually did not use much strength to kill Xu Ping, except for knocking him out and tying him up, he really did nothing, secondly, Xu Ping was scared to death alive, in fact, this can also be seen as the murderer's lack of physical strength, so he made this decision, as for Xu Ping's torture, it is nothing more than a way for the murderer to commit murder, not to torture Xu Ping. ”

After speaking, Shao Dong felt a little melancholy, pondered for a moment, and said: "Now, what I am most worried about is that he is addicted to his criminal aesthetics, enjoying this progress, and his psychology is beginning to change, his previous crimes were just for revenge, but if he begins to indulge in crime, not just revenge, then he will bring more and more threats to this society." ”

Indeed, this is the problem that Shao Dong is most worried about at present, because the murderer obviously has some mental illness, in other words, the murderer's psychology is unhealthy and distorted, if he is simply obsessed with the process of killing, it will be terrible.

After killing so many people, he is no longer afraid of killing, no longer has the burden of mind, and even begins to enjoy the process, so it is really not far from the time when he kills people at will.

Once that day comes, the whole thing will get out of hand, and God knows who he will do next, and when?

After Shao Dong finished speaking, most of them fell into deep thought, but only Wu Wei said: "Actually, have you ever thought that if we ourselves were the murderer of twenty or thirty years ago, who had been at large for so many years, and who were now fifty or sixty years old, what would we want most now? Isn't it a stable old age? As long as I don't commit crimes now, others will not think of me, but once I commit a crime, it will be easy to implicate a few old cases twenty or thirty years ago, is it really necessary to do this?"

In fact, this is the main reason why Wu Wei holds this point of view, if he is the murderer more than 20 years ago, since he finally escaped the punishment of the law, and now he is also an old age, then now, he should enjoy life more than expose himself.

Besides, decades have passed, even if it is the hatred of taking a wife, I don't know how many times it has been annihilated in the long river of this world.

Of course, Shao Dong shook his head and said: "It's not that simple, first of all, I said that the murderer is a person who has experienced a broken family and suffered a psychological blow, which causes him to not think like a normal person."

Moreover, his character is too paranoid, and the things he decides must not be destroyed by others, for him, killing people is not important, what matters is the purpose he achieves by killing people.

As long as he can achieve this goal, he will not care about the problems that we normal people think about. ”

Since this kind of inference, Shao Dong has never thought about the murderer in the direction of a normal person, he knows that this kind of person either doesn't do anything, or he makes people collapse.