When Wu Yong mentioned the first point in Xu Lang, he had already begun to realize that his thinking may have been misled by the murderer, and he preconceived that the murderer of Jin Enpei was the murderer of Xu Chan, so that when they solved the case, the focus would be on the common points of the two cases of Xu Chan case and Jin Enpei's murder case. This is also what the murderer deliberately did when he sent a package to Xu Lang and when he wrote the challenge, he just wanted to mislead the police's thinking of solving the case, so that he could lead the police by the nose and continue to walk according to his ideas.

When Ye Xuefei mentioned the challenge book and the word game, Wu Yong figured out what Xu Lang wanted to express.

Ten years ago, the reason why Xu Chan's murder case has passed so long and has not been solved is that it is limited by the technical conditions at the time, and second, the murderer did not leave any useful clues to solve the case at the scene, and third, the police have never been able to find the motive and tools of the murderer who killed Xu Chan, nor have they found the first crime scene, but Jin Enpei's case is different, although for the time being, the police have not found the exact location of Jin Enpei's murder, but when the murderer mailed two packages to Xu Lang, Leaving a lot of clues and flaws.

The word game is gradually known in recent years, and it is also known when computers began to popularize, and various games began to appear, which is a word often used among young people, if the murderer of Jin Enpei is the murderer who killed Xu Chan ten years ago, then this murderer is not too avant-garde.

Assuming that the murderer of Xu Chan was about the same age as Xu Lang, that is, about fifteen years old, then, ten years have passed, this murderer should be about twenty-five years old, but if this is the case, then the first question arises, can a fifteen-year-old child be proficient in tools such as scalpels? Can a fifteen-year-old child cut a corpse calmly and calmly after killing someone?

Even if it is a surgeon in some large hospitals, when they are doing surgery, it is impossible to do it without a few years or even more than ten years of practice, and it is impossible to accurately dismember Xu Chan's body into that shape, on Xu Chan's corpse, except for the knife wound where it was dismembered, there is no extra wound in other parts of Xu Chan's body, in addition, Xu Chan's corpse is dismembered by a very sophisticated and professional method, and it is impossible to do it without several years or even more than ten years of clinical experience, so the problem is, How is it possible for a teenager to do that?

The forensic doctor who performed the autopsy on Xu Chan's body once said that according to the wounds on the corpse, the murderer was at least a man in his thirties, so the murderer could not be a child who was only in his teens.

Whether it's a mobile phone or a computer, it has only begun to gradually become popular among the public in recent years, ten years ago, people were still using big brother, beeping machines and the like, it is impossible to know so much about games, even if that guy really mastered computers and mobile phones in this decade, a man in his forties, should grow older, rich social experience, become more calm, modern words like games, and the sharp and provocative words on the challenge book, It shouldn't come out of the mouth of people of this age, not to mention that the age judgment of the murderer of Xu Chan back then was between thirty-five and fifty years old, and thirty-five years old is just the lowest age value.

In the first challenge letter that Xu Lang received, although the murderer mentioned the case of Xu Lang's sister Xu Chan, so that the police thought that he was the murderer who killed Xu Chan ten years ago, but, in the second challenge letter, the murderer did not mention Xu Chan's case, but pointed directly at Jin Enpei's matter, in the second challenge letter, the murderer mentioned a person's name, Jin Kaize, Jin Kaize is Jin Enpei's father, and according to Zhao Hua's reaction to the investigation in Jin Enpei's hometown T City, Jin Kaize had died in a car accident seventeen years ago. Why did the murderer mention Jin Kaize? Could it be that the murderer has any relationship with Jin Kaize?

If the murderer is really the murderer who killed Xu Chan ten years ago, then he shot again after ten years and challenged Xu Lang in order to provoke Xu Lang, then he killed Jin Enpei just a random person who chose among the people Xu Lang knew, if this is really the case, then it doesn't matter whether he killed Jin Enpei or someone else, his main purpose in doing this is to provoke Xu Lang, provoke Xu Lang, and make Xu Lang lose his mind. There is no need for him to treat Jin Enpei so cruelly, as long as he kills Jin Enpei like he killed Xu Chan back then, after Jin Enpei's death, he directly dismembered Jin Enpei's body, mailed it to Xu Lang, or threw it in a place that was easy to be found by Xu Lang, there was no need to make such trouble, and there was no need to carry out such cruel means on Jin Enpei when Jin Enpei was alive.

In this way, the probability that the murderer of Jin Enpei and the murderer of Xu Chan are not the same person is becoming more and more reduced.

As for the fact that the murderer mentioned by Xu Lang and Jin Enpei should be familiar people, it can be seen from the previous investigation by the police, firstly, Jin Enpei bought a train ticket from T city to S city on March 1, and temporarily changed his mind, and the police saw Jin Enpei at the scene that he seemed to have met a familiar person at the train station, so he changed his mind, and secondly, the person who appeared at the bus station in S city with Jin Enpei, and Jin Enpei temporarily changed the place after getting into a taxi, Jin Enpei should be familiar with this person.

Wu Yong said the things he thought of one by one, Ning Yanran gradually understood at this time, after Xu Lang's reminder and Wu Yong's analysis, a conclusion can be drawn, that is, the murderer of Jin Enpei and the murderer of Xu Chan are not the same person, as for why the other party let Xu Lang and the police mistakenly think that he is the murderer of Xu Chan, this point has not been figured out by Xu Lang so far, however, Xu Lang has some vague guesses, but these speculations have no substantive evidence to prove.

Since the murderer of Jin Enpei was not the murderer of Xu Chan, then the murderer's purpose from the beginning was Jin Enpei, not Xu Lang, and the reason why he sent Jin Enpei's body to Xu Lang after brutally killing Jin Enpei must have a purpose.

When Xu Lang received the first challenge, he was still confused and couldn't think of a reason, but after Xu Lang saw the second challenge, he understood that the reason why the murderer sent the body to himself after killing Jin Enpei and wrote the challenge to provoke himself was to attract his own attention and let him follow the other party's guidance to investigate the car accident seventeen years ago, that is, the case of Jin Enpei's father Jin Kaize.

The mystery in front has been revealed, and everything seems to be much clearer, but what Xu Lang can't figure out is why the murderer asked him to investigate the car accident seventeen years ago? Could it be that the murderer has anything to do with Jin Kaize? Or rather, is there anything wrong with Jin Kaize's car accident? However, if this is the case, he can directly come to his detective office to find himself and let himself investigate the car accident back then, there is no need to go to great lengths to do this, and there is no need to kill people, is it because Jin Enpei works in his detective agency?

Xu Lang thinks about it and thinks it's unlikely, first, since the murderer knows the case of his sister Xu Chan being killed ten years ago and knows the murderer's modus operandi, then it means that the murderer who killed Jin Enpei must have a deep understanding of himself, since he knows himself so well, then he should know how not to contact himself through Jin Enpei, and second, it is the diary of Jin Enpei found by Shu Yue and Ziche Hexuan, who are the 'they' that Jin Enpei repeatedly mentioned in the diary? Could it be that 'they' also have something to do with the murderer?

Although Xu Lang has now discovered that the murderer of Jin Enpei and the murderer of his sister Xu Chan are not the same person according to various clues, Xu Lang not only did not feel happy, but became more and more worried, because he really couldn't figure out how the murderer of Jin Enpei knew the details of Xu Chan's case, especially the modus operandi of the murderer of Xu Chan, which was the question that Xu Lang was most concerned about.

There are many things that Xu Lang can't figure out, for example, why did Jin Enpei temporarily decide not to take the train and choose to take a car to S City? Why did she take a taxi to the suburbs after she arrived in S City, etc., Xu Lang couldn't figure it out, and she still needed to rely on the police to continue the investigation.

After Xu Lang and the others came to a new conclusion, Ning Yanran and Wu Yong immediately contacted Zhao Hua, who was still in T City, and asked them to contact the police in T City to investigate the accidental car accident case of Jin Enpei's father Jin Kaize seventeen years ago, and see if there was anything wrong with it, Ning Yanran They need to see the complete file file, maybe the clues of the murderer can be found from these file files, on the other hand, Ning Yanran also asked Zhao Hua to find a way to obtain the biological sample of Jin Enpei's mother Yu Duyun, They want to do a DNA comparison between Jin Enpei and Yu Duyun's DNA, which is a special request made by Xu Lang, because Xu Lang mentioned 'them' in Jin Enpei's diary, Jin Enpei has suspected that 'they' are his biological parents more than once, so that is to say, Jin Enpei is very likely not to be Jin Kaize and Yu Duyun's biological daughter, if this is the case, then there must be another hidden secret.

As for Xu Lang, he stayed in the dissection room with Ye Xuefei, and he also had to ask Ye Xuefei some questions about Jin Enpei's corpse.

According to Ye Xuefei's preliminary autopsy of Jin Enpei's head, Jin Enpei was killed three days ago, although this is a rough guess, however, the error should be within forty-eight hours, which also shows a problem, before Xu Lang received the first package, Jin Enpei was still alive.

As for the question Xu Lang wanted to ask, firstly, because Jin Enpei's head was also specially cleaned by the murderer, Jin Enpei's hair was taken care of by the murderer, and he also made a shape, and there were traces of makeup on his face, and secondly, Jin Enpei's head was also frozen.

Freezing the head, Xu Lang guessed that it might be to prevent the corpse from decomposing, although it is already early spring, the weather is still very cold, but the cold weather does not mean that the corpse will not rot, in the case of cold weather, the corpse will also rot and stink, but the decay is relatively slow, but Xu Lang can't figure out why the murderer wants to treat Jin Enpei's hair and face.

Since he cut off Jin Enpei's head, there is no need to pay attention to the makeup of the deceased, but the murderer did it, not only did he do it, but he also did it perfectly, not only did he style the deceased's hair, but also meticulously made up the deceased's face, the murderer was a psychopath, which was revealed from the beginning, but the perversion of ordinary murderers is reflected in the modus operandi, followed by the disposal of the deceased's body, Few murderers would be interested in the deceased's other places.

What is the purpose of styling the deceased's hair and applying makeup to his face? Is it to prevent the corpse from decomposing? Impossible, any kind of cosmetics is harmful to the skin of the human body, no matter how expensive cosmetics are, when Xu Lang saw these, the first thing that came to mind was the mortuary, the profession of the mortuary is generally the work of making up the dead, they do not make up the living, and serve the dead, however, this profession has only begun to rise in recent years, and few people know and engage in it.

Could it be that the murderer is an undertaker? Xu Lang thought about it and did not rule out this suspicion, but this still can't explain why he did this, from the previous indications, whether it is from the modus operandi or the disposal of the corpse, all of them reveal the murderer's resentment and hatred towards Jin Enpei, a pervert who cut off the palm of the other party and cut off the other party's head when the person is still alive, he doesn't need to do this, is it because of guilt?

Xu Lang thinks it's ridiculous when he thinks about it, a murderer who can use that method to kill people will feel guilty? And judging from the makeup and styling, these are all the dresses that Jin Enpei often does on weekdays, is it to humiliate Jin Enpei? Xu Lang couldn't figure it out.

Also, why did the murderer freeze Jin Enpei's body? Now this season, even if it is not frozen, it will take a certain amount of time for the corpse to decompose and stink, this is summer again, the corpse is not so fast to decay, Xu Lang can't figure it out, and Ye Xuefei can't figure out the reason.

Xu Lang returned to the second criminal investigation team with the challenge letter full of doubts, Xu Lang looked at the challenge book, Jin Kaize's name fell into deep thought, he was very curious, what kind of person is Jin Enpei's father, and is Jin Enpei's family really as simple as the police investigated? Now these are unknown, everything has to wait until Zhao Hua, who is still investigating in T City, and they can only send news, what Xu Lang can do now is to wait patiently.

————

In the house opposite Xu Lang's house, a man shrouded in darkness stood in a dark room, looking at the blackboard in front of him, on which were the photos and names of Xu Lang and the people around him.

The man stood in front of the blackboard for a long, long time, enough to make one think that he or she was a statue, and if it weren't for his slightly heaving chest and the occasional blinking of his eyes, it would have been easy to suspect that he was dead.

I don't know how long later, the person came to the direction of the balcony, lifted the corner of the curtain, it was already dark outside, the lights were on, the street lamps on the street emitted this orange light, not many pedestrians on the street hurriedly walked by, everyone either walked with their heads down, or laughed with the people around them, or played with their mobile phones, no one noticed the room on this floor with heavy curtains.

The man lifted the curtain and looked at the opposite side, it was Xu Lang's home, it was dark inside, there was no light, obviously, Xu Lang did not go home, this person was a little disappointed, just when he was about to put down the curtains, suddenly, Xu Lang's house was lit up, this person immediately stopped the movement in his hand, he quickly picked up the telescope placed aside, and observed every move on the opposite side.

Xu Lang's house first turned on the lights, and then, a figure appeared on the balcony, the curtains of the balcony were opened, and the person saw the person in Xu Lang's house through the telescope, she was not Xu Lang, but Shu Yue.

After Shu Yue opened the curtains, she pushed open the glass of the balcony to ventilate the room, and after Shu Yue did all this, she went to the kitchen.

That person can clearly see Shu Yue's every move in Xu Lang's house in the telescope, at this moment, Shu Yue is standing in front of the refrigerator at the kitchen door with two bags, the refrigerator door is open, Shu Yue is taking out some vegetables and other things from the bag and putting them in the refrigerator, after Shu Yue has done all this, he went to Xu Lang's bedroom, and after a while, Shu Yue walked into the bathroom with a bunch of clothes in his hand.

After the man saw this, he put down the binoculars and did not continue to monitor, he put down the curtains and returned to the living room, sat in the living room, looked at the blackboard opposite, a pair of cold eyes without the slightest emotion stared at the corners of Xu Lang's eyes in the photo, the corners of his mouth flashed a sneer, and muttered to himself: "Jin Enpei's death is just the beginning, the next is the point, Xu Lang, are you ready?" ”