At Zhang Yufei's home, Zhang Yufei's mother told us everything that happened before and after Zhang Yufei's disappearance, and she tried her best not to miss a single detail under our constant questioning.

For half a year, the eldest mother has been struggling to find her daughter, and has issued a missing person notice through all channels. And she cleans her daughter's bedroom once a day, and everything in the bedroom remains as it is.

She's doing it this way, waiting for her daughter to come back.

Because she always firmly believes that her daughter will definitely come back.

"Okay lady, if we need anything from you, we will come back to you. In the meantime, if you remember something, be sure to contact our police. I nodded, and ended the inquiry.

When the eldest lady heard my words, she was obviously stunned for a moment, and then murmured in a low voice: "Okay, okay." ”

I believe that my aunt has heard this sentence countless times, and almost every time the police come to investigate, she will say the last sentence.

Therefore, I left the next sentence on my lips: "As soon as Zhang Yufei has news, we will notify you immediately." ”

Returning to the office of the Jianglin City Criminal Police Team, Li Meng and I analyzed and summarized the clues of this case, and about an hour later, Lin Zifan and Xue Hang also returned from the investigation of Zhang Yufei's company.

As written in the dossier, they did not investigate any other valuable clues in Zhang Yufei's company.

After a few more hours, the other investigation teams returned, and again, they did not find any breakthrough clues in the case.

Everyone gathered clues and continued to discuss the case.

At this moment, Ling Gufeng sent a message to Li Meng, the content of the message was: "If you can't find something in common, then find a difference." ”

I glanced at it and saw the message on Li Meng's phone.

It seems that Ling Gufeng has always been very concerned about this serial disappearance case.

Li Meng didn't tell me the news sent by Ling Gufeng, so I pretended not to know.

However, Ling Gufeng's news provided me with a hint of inspiration, in serial murder cases, the target chosen by the murderer must have his own rules. But who says that this law is the same as that of the victim?

This is like a patient with difficulty in choosing a product, when faced with different types of goods, unable to choose, the easiest way to solve is to buy one for each type of product.

Again, this has its own rules, but there is no common ground between commodities.

If this line of thinking is followed, the 18 cases can be investigated together.

After each investigation team reported their own investigation clues this time, Li Meng spoke first: "We can't just look for common ground through the victims of eighteen cases, the target chosen by the murderer is likely to pursue different personalities and choose different victims." ”

This sentence provides a different way of thinking for everyone. But if you can't find the same now, it means that all of them are different.

This direction of investigation is very much like a nonsense, but it is not a nonsense.

But at this time, I had my own thoughts, and just as everyone was thinking, I said: "Now, if the murderer in the eighteen cases is the same person, then how does this murderer know and understand so many victims?" None of the 18 victims knew each other, and their identities and social relationships were very different, so how did the killer find them? This question is very critical. ”

"I suddenly thought of a serial murder case abroad, where there was no common ground between the identities and social relationships of multiple deceased. But after the case was solved, it was found that the murderer was a doctor in a hospital, and all the victims had gone to this hospital for medical examinations, so that the murderer had the victim's information. Lei Ji said suddenly.

"That's right, that's exactly what I'm trying to say, how the killer found them, and whether they all went to a common place to get acquainted with the killer." I said seriously.

"Judging from the identity information of these 18 victims, they have a wide range of ages and occupations. What kind of common ground will they go to? Lin Zifan thought about it and began to analyze.

"In other words, the eighteen of them have different lifestyles and living habits, what needs do they have in common?" Xue Hang followed Lin Zifan's words and said.

"Eat! Whether you have money or not, you will go to eat! Maybe they all went to the same restaurant, and the murderer ate at that restaurant, or maybe they were the staff at that restaurant! Thus locking them up and committing a crime! Jiang Tingbai immediately spoke.

When he analyzes the facts of the case, he always starts thinking from eating.

After everyone's discussion, everyone's thinking was completely stimulated, and the whole case analysis meeting fell into a brainstorming.

Instead of looking for clues about their identities and social relationships, everyone is looking for clues about whether they have common needs.

Eating, going to the doctor, playing, shopping, and so on, is everyone's need. It is possible that all eighteen victims traveled to a place at different times, and that place was the same place where the killer stayed for a long time.

The killer discovers them, learns about them, and finally kidnaps them.

Immediately after that, I suddenly thought of a very crucial question: "If the eighteen cases were all committed by the same murderer, then where are the eighteen missing people now?" If the murderer imprisoned them, then the place where eighteen people could be imprisoned at the same time must be very large. Then the murderer must have an accomplice, because once eighteen people join forces to resist, the murderer will definitely not be able to parry. Then there are the living conditions of 18 people, they need a lot of daily necessities and food, and the consumption is very large, and we can investigate from this point. ”

I paused, and then said, "If all eighteen people have been killed, where is the murderer's body hidden?" For two years, no one has found the body of the missing person, indicating that the body must be hidden in a place where it will not be found. Did the murderer have his own private yard? Or a private garden? Or is it a private basement? ”

"Thinking about it this way, the murderer's psychological endurance is really strong enough, and he is accompanied by corpses every day, what kind of psychological quality is this." Lei Ji took a deep breath and said with a long sigh.

"Without a strong psychological quality, will you complete such a huge series of cases?" I paused and said in a deep voice.

"The next direction of case detection is to investigate the movement of eighteen people."