If there were only one scene with such strange traces, it would not necessarily attract the attention of others, but after walking through the next few scenes, it was found that almost all the murder scenes had the same traces.

This is a bit unbelievable, after all, the layout on the ground is not the same in the four scenes, but in the end, it is almost in the same position, leaving exactly the same traces.

Almost the same modus operandi, the four bodies all died in the same way, and the knots tied to the hands and feet were also exactly the same, and now even the scene showed exactly the same traces, and it was basically confirmed that it was a serial murder case.

These cases have not been fully linked before, and now it seems that there are no doubts in this regard.

On the contrary, it is now necessary to investigate the social background of these people, and it is best to find out what connections these people had before, so that they can also follow their original connections to find out the cause of the case.

Once none of these people have any contact, I'm afraid things are a bit tricky.

Because if these people don't have any connection, it is enough to prove that the murderer should kill people randomly, and there is no reason for killing these people, and the killing has no purpose, or no direction, just want to kill, and kill people casually.

Such murderers are even more dangerous, because they kill people, but when there is not enough, unless they arrest him, the murder will hardly stop.

In addition to the corpse found today, Ding Fan also ran to three other homes, and the last place of the crime was the deceased who Qin Lu had called and asked before.

You must know that this deceased is the only one who is different from several other deceased, and the cause of death is also excessive bleeding and death, but the murder weapon is completely different.

In the four homicide cases, three of the deceased were killed by people who pierced the chest or heart with a sharp weapon, and only this one, the murderer did not use any murder weapon, but used his teeth to bite through the victim's aorta, resulting in excessive bleeding and death.

When Ding Fan arrived at the scene, in addition to finding the trace on the ground, he also glanced at the blood stains on the ground at the scene, but after reading it, he frowned silently.

And Qin Lu seemed to understand what he meant, from the very beginning she had already noticed that there was something wrong with the blood stains on the ground.

After all, although the deceased's figure was not tall, he was wide and fat, and after biting the aorta, the blood on the ground was obviously not up to the amount of blood of a normal person.

So where did the rest of the blood go?

A detailed autopsy has been done on the body, which proves that the deceased's body did not have any symptoms or signs of poisoning before being killed, and there were no extra wounds on the body, but the blood was evaporated from the world.

It was precisely because of this that Qin Lu called Ding Fan and wanted to ask if this kind of vampire-like modus operandi had any relevant records before.

Unexpectedly, Ding Fan had really seen it when he was abroad before, but this situation had not happened in China.

Moreover, after this case was discovered, Qin Lu had already found someone to investigate, and there was no record of the disease of the disease in the entire Jin'an and even the entire Sanjin region.

The prevalence of this disease itself is very small, and if there is no such disease in 20 years, then even if there is, it will already be sick and dead at this time, and it should not be out to kill.

After thinking about it, there are really a lot of doubts in this case, but I don't have time to think about it now.

It had been a while since the three of them left the police station, and the preliminary report of the forensic doctor over there had already come out, and Director Lu was already waiting for them to have a meeting.

The trio had to re-cordon off the scene and return to the police station.

By the time the three of them returned to the police station, the entire conference room of the police station was already busy, and Meng Huan was also among them.

Ding Fan didn't alarm others, found a corner position, and quietly watched them busy in front.

Zhou Feng originally wanted to say hello to Meng Huan, but seeing Ding Fan sitting on the side without saying a word, he also sat beside him very quietly, took a cigarette and handed it to him.

The two sat in the corner, listening to their conversation, but they whispered to each other.

"The identity of the deceased, we have investigated the results here!" Meng Huan's young man said: "I investigated with the deceased's neighbor before, the deceased's name is Ma Qi, fifty-two years old this year, three years ago, the old wife is no longer there, just a son, has been working abroad, rarely come back these years, this house has always been lived by himself, but he doesn't live here, this old house has been planned to be rebuilt, and there is no one around." ”

"I've also investigated the informant here!" The former one just finished speaking, and then another middle-aged man spoke: "The house was left by the old man of the March family, he hasn't been back for many years, usually he lives in the house near Bi Fangyuan, it's strange to say, the upstairs of his house is an old neighbor, saying that his family was poor in the past, and then it was very happy to buy a house, since that time, few people have seen him, and when he came back this time, I didn't notice!"

After listening to the reports of several of his subordinates, Meng Huan nodded silently, and reached out to write the words 'suddenly rich' on the prompt board.

Judging from the information that we have in hand now, this deceased March does mean that he is a little rich, and he was idle before, but suddenly he has money in his hands, and it was twenty years ago.

At that time, the families lived very close, and suddenly there was money in his hands, it was indeed not easy to hide it, and he bought a house outside, so the change was indeed a bit big.

"Have you checked what he did before he became rich, or where he went before!" Meng Huan quickly flipped through the information in his hand, frowned and asked: "It is impossible for a person to make a fortune for no reason, there must be some root cause in this, ask someone to check the past of this March, can make him earn a lot of money in a short time, enough for him to buy a house and send his children abroad, this money must not be a small amount!"

Not to mention, Meng Huan's way of thinking is still very similar to Ding Fan, if it were Ding Fan, he would also investigate this, but it was necessary to check it anyway, and it was best to check the other three people by the way.

Since he is a serial killer, it is very likely that the purpose of the killing is due to revenge.

Unless they didn't have any relationship before, and the murderer was just looking for a random target, that's a different story.

"I've already investigated this!" Meng Huan finished speaking, and a very handsome young man sitting next to him spoke, Ding Fan still had a little impression of this person, he had seen it a few times in the training base before, and it seemed that his name was Hu Yizhou:" The deceased used to be a small business, at first just walking the streets, and then saved some money, bought a half-used truck retired from the production team, and did some delivery work outside, that time he almost spent all the money in the family, at that time his parents also had a big fight with him, that is, after a few months, I heard that he sent it, and after coming back, he bought a house, found a woman outside to get married, and the neighbors around him knew that he made a lot of money outside, but no one knew how he earned this money!"

Twenty years ago, it would have been nice to have a big car at home.

Ordinary people can afford to raise a tractor is not ordinary, to say that this March has a bit of a business brain, but think about a car, a few months, want to earn a house back, it doesn't seem realistic!

Even if he digs gold, he can't make so much money in a short period of time!

Not to mention that Ding Fan didn't believe it, even Zhou Feng, who was sitting next to him, didn't believe it a little, and shook his head vigorously.

"If you're done, then I'll tell you about the news from my side!" Qin Lu came back with Ding Fan, but she didn't sit in the last position, but sat directly at the conference table, listening to everyone's analysis, and finally spoke: " The corpse has now done a simple autopsy, but there are not many things from him, for the time being, I just know that there are many wounds on the deceased's body, although they are not fatal, but many of the wounds are deep to the bone, and there is a hard wound on the back of the deceased's head, the time is not very long, about three days, but these are not fatal injuries, the fatal wound is in his chest, and the cause of death is excessive blood loss!"

These clues are all on the bright side, even if they are not forensics, they can be seen to some extent.

It is said that the analysis of the facts of the case by these things cannot completely analyze anything direct.

"But there's one thing that's a little strange!" Qin Lu said, putting a photo on the table and saying: "The wounds on the four victims' bodies are basically the same, and we have compared the wounds on everyone's bodies, and at the same time, I also found a problem, most of the wounds on the victim's body are not fatal, and even the wounds seem to have been specially designed, even if the bones are deep, there is not much blood flowing." ”

This clue really made everyone's eyes light up, Meng Huan immediately thought of something, and hurriedly asked: "Could it be that the murderer has a certain medical foundation, so he is very familiar with human body dissection?"

Qin Lu glanced in Ding Fan's direction and nodded slightly, but he was not completely sure and said: "It's hard to say, I don't know if I have medical expertise, at least I must be very familiar with the structure of the human body." ”

Don't say it, if Qin Lu didn't say so, Ding Fan would really want to go to the doctor's side.

Now after he said this, Ding Fan really thought of some other professions, but these people are probably not easy to find.

Moreover, the scope of the search and investigation may have expanded a lot, and it is not possible to find out in a short period of time.

It seems that this case needs to be prepared for a long battle.

Then it is very likely that it will be time to test the patience, and whoever is not patient enough will lose this round first!