The police in the north moved to the north very strongly, and under Zhao Yu's greeting, they immediately summoned the police officers from the various sub-bureaus of the north to participate, and the number of people reached hundreds of people, and the momentum was huge.

Zhao Yu divided the police into 10 teams on average, 9 of which were responsible for one-on-one investigation of the deceased in the demon case. Zhao Yu asked them to do it in accordance with the highest specifications, to re-investigate the situation of each deceased person before his death, not a single detail can be missed, and the more information they get, the better.

As for the group that was left behind, it was mainly responsible for restoring Han Kuan's movement trajectory back then, and investigating Han Kuan's situation when he moved north.

After Zhao Yu assigned the task, Director Xu Yihua also emphasized discipline in public, and announced the reward and punishment system, requiring the police officers to perform their duties conscientiously and work overtime to complete the task as soon as possible. Those who are able to obtain important clues will be rewarded for their meritorious deeds; and if it is found that the investigation is not serious and the discipline is lax, they will be punished and severely punished!

When the director spoke, the police officers naturally did not dare to slack off, and after receiving the order to leave, they immediately devoted themselves to the investigation.

After that, Zhao Yu called Wu Xiumin again, asking the gold police not to be idle, they must immediately increase the police force, and then re-investigate everything related to Han Kuan to see if it is possible to find new clues?

Of course, the same is true for Yaoming's side, and all the tasks over there are handed over to Wang Can.

In this way, under the call of Zhao Yu, a huge investigation was launched in three cities at the same time.

Although the influence of the demon case is not as good as that of the headless female corpse case, it is one of the five unsolved cases after all. When the police in various places were ordered to understand that they were investigating the famous demon case, they naturally went all out and worked hard.

In just a few days after that, all kinds of information were collected in the office of the special investigation team located in the Beiqian Police Station, and when the materials were printed, they could be described as a mountain.

However, even though there is so much information, Zhao Yu still has to look at everything one by one!

In the past few days, Zhao Yu has really worked hard! He can't untie his clothes, almost all of his food and accommodation are in the office, and he carefully checks every piece of information, and does not let go of any detail!

For Zhao Yu's tireless work attitude and forgetting to sleep and eat, the local police officers, even the colleagues of the special investigation team were impressed by him, and they were amazed. Although, they all know that Zhao Yu is stubborn, but it is really rare to be stubborn to such an awe-inspiring degree!

Especially Miao Ying, who has been with Zhao Yu all the way, is even more surprised by Zhao Yu's qualitative transformation that is difficult to describe in words. She never imagined that the dissolute, arrogant and unruly stinky rascal in the past would have such a persistent and tenacious side.

Whether it is gratification or admiration, all in all, Zhao Yu's spirit of never admitting defeat flowing in his bones deeply moved Miao Ying and made Miao Ying more sure that she didn't choose the wrong person in the first place!

Seeing Zhao Yu's performance like this, the morale of the team members also increased greatly, and they were not to be left behind, and in the past few days, they worked together to consult a lot of information and analyze a large number of clues. Although no conclusive evidence has been found so far, the speculation that the murderer is Han Kuan is becoming more and more clear and clear.

Sometimes, solving a case is like a layer of window paper, once it is pierced, it is clear at a glance.

In a few days, Zhao Yu carefully browsed what Han Kuan had published in chronological order, and was shocked to find that in fact, the answers they had been looking for before had already been reflected in Han Kuan's book.

Although Han Kuan's is not very famous, if you read it carefully, you will find that his logic is very strong. Moreover, the more he writes in the later period, the more he focuses on the psychological aspect, and he can accurately grasp the psychological state of each character, whether he is a criminal or a law enforcer.

Therefore, when Zhao Yu finished reading the whole article, he finally realized a shocking fact: Han Kuan not only continued to grow in creation, but also underwent a qualitative transformation, and he was already an out-and-out psychological expert!

Therefore, he has every strength to deceive the police, and even let Zhao Yu fall in love with him!

In addition, in addition, Zeng Ke also found a major problem with Han Kuan in a video material.

It was an earlier police interrogation video, in which Han Kuan was crying bitterly because of his wife's death, but the words he uttered in his mouth attracted Zeng Ke's attention.

During the interrogation at that time, Han Kuan said with tears in his eyes: "You say you understand me, but who of you can know what it's like to lie in your wife's blood?"

At first glance, this sentence seems to be fine, but if you analyze it carefully, it has to make people feel strange.

For this reason, Zeng Ke specially asked Ba Chen to verify the matter, and according to Ba Chen's recollection and verification, he also felt that it was unreasonable for Han Kuan to speak like this.

Because, after the police arrived at the scene of Zhang Jingru's death, because Han Kuan was holding a knife in his hand, the police naturally thought that he wanted to commit suicide by martyrdom, so they sent him to the hospital for rescue as soon as possible.

At that time, Han Kuan's clothes were covered in blood, and the hospital had to take off his bloody clothes, clean him up, and change into a hospital gown.

Because it was related to the murder, the bloody clothes were naturally accepted as evidence by the police and sent to the forensic department for examination.

According to the doctor's test report, Han Kuan was in a severe coma at the time, and he didn't gradually wake up until more than eight o'clock in the morning, so it was impossible for him to know what happened last night?

Moreover, Ba Chen remembered it clearly, until the police took Han Kuan as a suspect in killing his wife and escorted him from the hospital to the police station, he didn't even know the news that Zhang Jingru had died.

After that, although the police showed him photos of the crime scene for interrogation, but after thinking about it carefully, Han Kuan's words were still unreasonable. Even if he knew that he had been lying in a pool of his wife's blood, how could he feel?

This sentence obviously betrayed him, because he was the murderer who killed Zhang Jingru! Before he fell unconscious, he was already lying in a pool of Zhang Jingru's blood......

In addition to the above two things, they also have a new harvest in the investigation of the deceased in the demon case. Among them, the police officers who were responsible for investigating the old lady in her 60s finally found the old lady's old neighbor through unremitting efforts.

According to one of the neighbors, the old lady had been rumored to have tortured and killed small animals before her death. Moreover, the neighbor is also very sure that this rumor came from the Internet.

After getting this clue, the police immediately launched an investigation around the network, and finally found the root cause.

It turned out that in the year of the demon case, chat software such as QQ had not yet been widely popularized, and local young people who wanted to chat online could only choose a chat forum called Youyuan. It is an open chat platform, similar to today's chat group, where people can talk and make friends after they enter, which is very popular.

However, this kind of chat platform has certain regional restrictions, and it is limited to a certain city, or a certain region.

It is said that rumors about the old lady abusing and killing small animals spread from this chat platform. It is conceivable that the reason why the old lady attracted the attention of the murderous demon is probably also due to this!

Therefore, Zhao Yu and the others finally understood how Han Kuan was able to get the news so quickly and find the target!

He must have obtained it through this chat platform. At that time, the forum did not require a real-name system, and the management was not strict, he only needed to start casually in it, and a large group of people would provide clues for him.

However, after all these years, the data is no longer available. Besides, even if Han Kuan's chat history can really be found, it will not play any role.

Therefore, although the direction of the investigation has been very clear, all Zhao Yu and the others have obtained are soft evidence, which is invalid.

To prove Han Kuan's guilt, they must find more conclusive evidence. But...... Zhao Yu has been opening hexagrams for several days, but still not a single "Gen" hexagram has been opened, is it ...... Is the Demon Case really an unsolvable unsolved case?

No!

Zhao Yu's answer was extremely resolute!

As the investigation deepened, as Zhao Yu's understanding of Han Kuan became more and more profound, he felt more and more that although Han Kuan was clever, he was not a god, and if a person had committed such a heinous crime, there must be loopholes!