In the entire conference room, you said a word to him, and it was very lively, only Ding Fan and Zhou Feng sat on the side, listening without saying a word, as if he was not involved in this case.

It wasn't until the meeting on the analysis of the case was coming to an end, and it was already dark outside, that Meng Huan remembered that Ding Fan was here today.

A group of people are analyzing this case here, and there is no progress, why don't you ask Ding Fan to see him?

You must know that Ding Fan's brain circuit is completely different from that of a normal person, plus he has experienced more things than everyone else in these years abroad, and the case files he has seen are even more unimaginable to everyone.

Maybe he'll be able to see something!

It was only when Meng Huan thought of Ding Fan that she realized that it seemed that during the whole meeting, she had already forgotten the existence of this person, and she didn't even know if he was here.

After looking for a long time, in the most inconspicuous position in the crowd, I saw Ding Fan who was sitting with Zhou Feng smoking a cigarette, and hurriedly stood up and stepped forward to pull him out.

"Master, why don't you make a noise when you're here!" As long as Meng Huan saw Ding Fan present, the whole person seemed to have been beaten with chicken blood, and he had a bottom in his heart: "I heard that you walked around the scene of the crime, you must have found something!"

Since Meng Huan joined the special case team, there have been a lot of cases in her hands, and every time it has been very smooth, these people under her have their own skills, and they can help her a lot in case analysis, it can be said that the previous cases have always been difficult to detect, even if some clues are a little difficult to find, but in the end, the case was basically solved without danger.

It's the first time that a case like this one has been so troublesome and confusing.

It can be said that this case, the pressure on her is really not ordinary, but fortunately, Ding Fan has come over, which can somewhat relax her heart.

Originally, Ding Fan didn't want to stand in front of everyone, after all, this case belonged to Meng Huan's team, and he just came over to help a little, although he also had a little clue in his hand, he didn't think about saying it in front of everyone, he just hoped to quietly tell Meng Huan about the news.

Who knows, Meng Huan directly pulled him out of the crowd, and it won't work if he doesn't say it now.

I had to walk to Meng Huan's position, reached out and took out a rope from my pocket, put it on the table and said: "I don't know if you have noticed this knot before, the four crime scenes, the most direct connection should be this, the special way to tie the knot of the mountaineering rope, has this direction been investigated?"

"Checked!" Hu Yizhou saw the rope taken out of Ding Fan's hand, and immediately opened the book and said: "I didn't know what kind of knot this was before, so it took a little time to investigate, and then I asked when I visited the local area, and I learned that it is a knot used in mountaineering, and I also contacted several local more famous mountaineering clubs, but not everyone knows this kind of knot, it is too cumbersome, and few people will use it!"

Ding Fan nodded, took the rope in his hand, untied the knot in a few clicks, and then pulled Meng Huan, wrapped the rope around her wrist, and turned his fingers quickly, before and after, in less than thirty seconds, the knot was completed.

"The way to tie the knot is actually not difficult, and if you are proficient, this kind of knot is actually very convenient, and it is not easy to break free!" Ding Fan gave everyone an experiment, signaled Meng Huan, and asked her to try to break free.

The result is self-evident, and this knot is simply difficult to break free.

And Ding Fan opened the knot casually, and then used another knot on Meng Huan's hand, and quickly tied the rope, but the knot used this time was completely different from before.

Meng Huan also tried, this knot doesn't look as cumbersome as before, but it's not easy to break free, at least a little tool is needed to break free.

"This knot is called the Fisherman's Knot, it's very easy, even an old boatman, you can complete it with one hand!" Ding Fan said as he untied the rope and continued: "There are two kinds of knots, one is simple and the other is cumbersome, the use is very different, and the effect is almost the same when it can be used to tie people, but the murderer used a more cumbersome one, have you ever thought about why?"

It's true, after Ding Fan's question, everyone reacted.

I used to spend all my attention on the knot, and I really didn't care much about the time of the knot, and so on.

"Don't talk about March, the location where he lives is relatively remote, and where does Xue Xiang live?" After Ding Fan raised this question, he was silent for a while, and continued: "Xue Xiang lives in the center of the city, which can be said to be the most prosperous area, and there are people living next door, so the knot must be fast, but the murderer did not use a simple fisherman's knot, but used this cumbersome Proshock knot, does he have a lot of time?"

"Could it be because this murderer himself won't use other knots?"

"I think this murderer is very quick to tie knots and is very confident in his own methods, so there is no need for him to choose a simple, but a more cumbersome knotting method to prove his ability, which is like a demonstration!"

……

Ding Fan's question was raised, and the atmosphere in the entire office was instantly brought up, and everyone had everything to say.

Only Meng Huan stood aside and thought quietly for a long time before he spoke: "Will it be ...... The murderer had been prepared early in the morning, knowing that during that time period, even if there were many people in the neighborhood where Xue Xiang lived, no one would find out what he had done.

When Ding Fan heard this, a little smile finally appeared on his face, he took out a photo from his arms and put it on the table and said: "When I investigated several scenes, I found that there was a very strange mark outside the door of the deceased's house, which looked like a composite symbol of the letter A and a Ω, a bit similar to the personal mark left by the thief after stepping on the spot!"

As soon as Ding Fan finished speaking, Zhou Feng seemed to think of something, grabbed his Mediterranean head and said: "It's true, when I was in the arrest team before, I caught some thieves, and those people have their own symbols, and generally after stepping on the outside, they will leave a mark, as long as there is a mark at the door, other thieves will not worry about this family." ”

Although this Zhou Feng is not in the field service group, no matter what, he is a veteran police officer who has worked in the police station for 30 years, and everyone has to think carefully about what he says, maybe any sentence will be pointed to the key position.

But this time Zhou Feng really didn't understand it, from the beginning he felt that it was a murderer who killed people, and it was very likely that he was making money, and now when he sees this kind of common method used by thieves at the door, he will inevitably think of the previous speculation.

But Ding Fan didn't mean this, this sign can only prove that the murderer had done a lot of detailed investigations before the deceased was killed.

The murderer knows more about the habits of the deceased than the police, and if they want to investigate the murderer's motives, the police are obviously in a vulnerable position.

"I'm just saying that this method is a bit similar to a thief's stepping point!" Ding Fan smiled at Zhou Feng and said: "Old Zhou, do me a favor, I think you know the most about the local thieves, help find a few back, and see if any of their peers have seen this symbol!"

Since Zhou Feng has said that these thieves are the most commonly used symbols, it is better to ask him to catch a few thieves and help identify the symbols.

And Zhou Feng didn't think much about it, nodded and went out first, thinking that he was in Jin'an's generation, and he still had this face.

As for the rest of the people, they still put their curious eyes on the photos that Ding Fan took out.

Speaking of which, the few photos that Ding Fan brought back this time really brought them a lot of inspiration, but at the same time, they also added new questions.

One symbol, two concepts, one in English and one in mathematics, these two things are put together, and there is really no sense of disobedience.

"Master, have you ever seen this symbol?" Meng Huan looked at it for a long time, but he didn't see what this thing meant, so he could only ask Ding Fan this question.

It's just that Ding Fan hasn't seen this thing either, it's hand-drawn, or on the wall, it's very scribbled, it's out of shape, and it's already good to be able to see the approximate shape.

"I haven't seen it, but this symbol, which appeared in four crime locations at the same time, is obviously not drawn by the murderer at random!" Ding Fan sighed, shook his head and said: "In addition to these two points, the rest is the common point on the four deceased, just now Forensic Doctor Qin has made it very clear, the deceased has wounds left by the same type of sharp weapon on his body, which makes me feel more like a vendetta, do you have any opinions?"

Everyone in the room looked at each other and nodded to each other, apparently no one objected to this.

"Then the next direction of the investigation, in fact, I still think that you can find the deceased's neighbors or friends to investigate!" Ding Fan stood up straight, moved his arm a little sore, and said: " Since the murderer has appeared at the scene of the crime many times, then it is impossible that no one has seen him, more or less there will always be people who have seen him, I think he should not show his face, it is very likely that he is covered with his face, this season will be covered tightly, it is estimated that it is easy to be remembered, and ask the cleaner or something, the murderer will prepare in advance, and he has already begun to step on the spot in the early morning. ”

Meng Huan listened to it for a long time, and he already had a rough plan in his mind, but he needed some detailed things, and he would soon be able to prepare the whole plan.

At the same time, she did not forget another question: "Master, do we still need to investigate the social relations and background information of the deceased?"

When Ding Fan heard this, he suddenly remembered Zhou Feng's words before, nodded and said: "Of course we have to investigate, not only to investigate, but also to investigate a lot, find out all the information of the four victims in the past thirty years, and make all the timelines of their thirty years ago, so that their intersection will become very obvious, if the murderer is not a random crime, then these four people should be connected......

As soon as he said this, Ding Fan suddenly paused, and everyone in the entire conference room was stunned, looking at him in surprise.

After all, he was obviously only halfway through what he had just said, and suddenly paused, thinking that he had thought of something.

But no one dared to ask about specific things, and he didn't dare to bother at this time, for fear of interrupting his train of thought and affecting his analysis.

But no one expected that Ding Fan would pause for nearly ten minutes before continuing: "Director Lu, help contact the police stations in the surrounding areas, and check whether there have been similar cases in the past year, I suspect that the actual location of this case may not be in Jin'an, since the first case, this murderer's methods are very skilled, every time the knife goes down, the wound is very neat and just right, this is not like the first crime!"

As soon as these words came out, everyone gasped.

It's not because of how surprising Ding Fan's analysis is, but because of this possibility, it is very likely that the victims are not just four.