"I think there is more than one suspect in this case." While everyone was discussing it passionately, I interjected.

Wen Ning asked everyone to be quiet, he said that he has been a little confused these days, let me analyze for him what I mean by this. I pointed to the sacks on the floor that contained the books and said that there was a very important clue that had been overlooked.

In the grave where the fourth body was found, in addition to the stumps of the other three deceased, the pens that caused the corpses to be mutilated, and the pencils and paper used to copy the tombstones, there was another important piece of evidence, the bag for the stumps and pens.

When Wen Ning and I saw the bag of pens and stumps, there were two layers of bags, the outer layer was the identification bag used by the police, and when the stump and pen were found, they were packed on the inner layer of bags, and the bag had the number of the police academy, so it was certain that it was a special identification bag for the police academy identification center.

The four girls, all of whom are trace studies students, often attend classes at the police academy's forensic center, and it is understandable that they are exposed to these cases, but the question is why they are taking these bags out. The bag was relatively large, and it was not convenient to fold it and put it on the body, and no backpacks were found at the farmhouse except for the clothes and pants of the three girls and the shoes they were wearing.

Assuming that the two identification bags were brought to the scene by the deceased themselves, what was their purpose, to hold so many pens they had bought? This assumption is obviously not quite in line with common sense, I think that so many pens were not brought to the scene by the four female students, because the books they read, whether they painted corpse mud, or copied tombstones, or asked pen fairies, did not need so many pens.

Moreover, if you buy more than a dozen pens in a stationery store, the stationery store will definitely have a bag, and there is no need for the four girls to use the identification bag, and there are no ordinary bags that will be delivered by any store at the scene. Of course, this is just a possibility that is speculated according to common sense, and it is also possible that so many pens were indeed purchased by four girls for some purpose, but it is unlikely that so many pens want to be hidden on their bodies, and if they carry them in their hands, the owner of the farmhouse, Geng Fufu, must also have an impression.

Wen Ning asked if it would be the fourth girl who brought her to the scene, so Geng Fufu didn't find out. Geng Fufu didn't know that the fourth girl also went, because when he rented the farmhouse from Geng Fufu, there were only three girls who died in the farmhouse, and the fourth girl went later.

Wen Ning's conjecture also made me negate, according to the current evidence, it can be shown that the first three girls went empty-handed, they probably put the paper and pencil used to invite the pen fairy on their bodies for convenience, as for the candlestick, as well as the fruits they ate, they were all provided by Geng Fufu for a fee. Upon questioning, Geng Fufu denied that the fruit knife used for amputation was his.

Wen Ning assumed that the first three girls left empty-handed, and the other things were brought by the fourth girl later, but the problem was still not solved, and there was no need for the fourth girl to take it to the scene in a special bag from the police academy. Wen Ning's statement is based on the assumption that the fourth girl is the murderer, and if the fourth girl is the murderer, she has no intention of hiding the traces of the scene at all, so she will not throw away the ordinary bag used for the fruit knife and pen so that the police cannot find it.

The case progressed to this point, coupled with the clues of the source of the ghost book, Wen Ning finally gradually put aside the assumption that the fourth girl was the murderer and committed suicide in fear of crime. He nodded, thinking that what I had said made sense, and told me to continue analyzing.

In my opinion, so many things were not brought to the scene of the murder by the four deceased at all, but by the real murderer. In this way, the problem of the identification bag of the police academy can also be reasonably explained, the murderer has created the illusion that the fourth girl is the murderer and committed suicide in fear of crime, and the special identification bag of the police academy is also what the murderer wants everyone to think that the fourth girl is the murderer and stayed at the scene, because only the insiders of the police academy can contact the special identification bag of the police academy.

The police academy is closed, and it is very difficult for ordinary people to enter, let alone enter the identification center and steal the special identification bag, I made a very bold assumption that there were at least two murderers, one of whom was a person from inside the police academy, and it was a person who had access to the identification center, a student, or a lecturer.

Wen Ning asked me why I thought there were at least two murderers.

Although I don't know who the person who sells ghost books will be, it is almost certain that he is a man. Whether the man had anything to do with the crime is unknown. But through his eagerness to buy those books at a low price, and the vendors sold to the neighborhood of the police academy, these places are the places where police academy students are most likely to go when they can leave the school, and this case is related to psychic games such as inviting pen fairies, it can be temporarily presumed that the guy who sells ghost books is a suspect.

The tragic death of the four girls and the involvement of ghosts and spirits is obvious, this is a premeditated crime, not a crime unpremeditated by a psychopathic killer. Therefore, it is likely that the four girls were deliberately led to buy by the young man after the young man bought them from the vendor on the flyover, otherwise it would not have been such a coincidence.

After the four girls bought the books, the murderer wanted to use the method related to the pen fairy to kill the four girls, and he had to control the psychological movements of the four girls at all times.

But the murderer succeeded, which shows that it is someone who is always around to pay attention to the psychological movements of the four girls and understand whether they really believe in this thing, and the murderer's plan will be successfully implemented. Because of the strict management of the school, the four girls did not often have contact with male students, and before the crime, almost no boys knew that the four girls played with the pen fairy, so I think that one of the murderers was a person who was relatively easy to contact the four deceased and easy to understand the psychological movements of the four girls, and such a person is more likely to be a girl.

Wen Ning suddenly realized when he heard this, I smiled slightly, and said that my hypothesis is only preliminary, there are many loopholes, and there is not much evidence to support it, the police can try it according to this clue, but they can't give up other clues.

My analysis is very complicated, but everyone has thought about it carefully and can understand it. Wen Ning nodded, and he continued to analyze according to my assumptions. According to me, this case was a premeditated joint crime, and it is likely that one of the people was someone from within the police academy. The murderer inside the police academy has been identified with many characteristics: he has frequent contact with four girls, most likely girls, and he has access to the identification center and a special identification bag.

In the end, according to some clues, the police simulated the whole process of the development of a case: the murderer inside the police academy led the four deceased to the stalls where the guy bought the ghost books in advance, and made the deceased interested in the ghost books, and then persuaded the four girls to play the game of inviting the pen fairy, and the reason for the persuasion was likely to be to ask the pen fairy about his future and marriage. Subsequently, the murderers inside the police academy teamed up with a young man who sold ghost books to murder four girls, and created the illusion that the fourth girl committed suicide in fear of crime.

Wen Ning felt that such a simulation was very possible, but there were many questions that followed, such as how the murderer killed the four girls without struggling and fighting. I haven't figured this question through for the time being, so I asked Wen Ning to first lock up the suspects inside the police academy according to the inference we just made.

Wen Ning nodded, assigned the task, and he shifted the distribution of the police force. Wen Ning focused on the inside of the police academy, and as for the others, he continued to investigate other possibilities so as not to slip through the net. Wen Ning called the leader of the police academy, and after listening to the possibility of my analysis, the leader's face turned pale with fright.

He asked me if I wanted to make it clear, it is a very trivial matter for people inside the police academy to commit crimes, and if it is not done well, the reputation of the police academy will be affected. I nodded and said that I had figured it out, and that all possibilities had to be investigated, otherwise the case would not be solved.

I just solve the case, I don't think too much, Wen Ning thinks more than me, before he has substantive evidence, he will still investigate in secret, and it will not cause panic. The scope of Wen Ning's investigation is relatively small, and those who can contact the criminal suspects and the identification center are nothing more than students or lecturers in majors related to identification, such as trace science and forensic science, especially those students around the girls' dormitory.

I asked the leaders to be mentally prepared because I felt that the case would be solved soon......