Of all the animals, humans are the only murderous, the only ones that are sadistic because of pleasure. ———— Mark Twain

Time always passes from the fingers unconsciously, and will not stay at all because people can keep it, from ancient times to the present, there are many people who try to keep time whimsically, however, they all ended in failure, in the blink of an eye, the time came to November 5th, two days have passed since the murder of Tan Boheng's family.

In the past two days, the news of various media in S City have been frantically reporting about the murder of Tan Boheng's family, and the murder of Tan Boheng has made headlines on the front page of various media for a while, and the headlines are also very eye-catching.

"The family of a famous university professor was tragically destroyed, is it a vendetta or a love killing?"

"The teacher's family has been wiped out, who will speak up for the teaching profession?"

"The murder of Tan Boheng's family is suspected to be a bloody case caused by Tan Boheng's affair with a female student."

"Tan Boheng's murder is suspected to have been caused by an affair between Tan Shihao and a minor high school girl."

“”

There are countless similar headlines, and these media reporters began to dig deep into all the deeds of Tan Boheng's family over the years, from how Tan Boheng became the vice president of S University, how he became a professor, and how he and Fan Ziyao came together to form a family, these things that were already buried in the dust of history were dug up by these pervasive reporters and how they were widely reported.

Compared with the hype of media reporters, what is even more chilling is that many people who saw this news on the Internet began to leave comments and complain.

"Every teacher is a good thing, they often use various names to ask the parents of the students for money, and if the parents don't give money, the children start to fail, I was the one back then."

"Tan Boheng's old family died well, I hope all the teachers are dead, so that we don't have to take exams in the future."

"Are Tan Boheng's family dead? Isn't there another survivor? Why didn't he die? Did he kill his own family? ”

"The news said that Tan Boheng's family was killed because Tan Boheng had an affair with a female student at S University, which caused the female student to become pregnant, and the female student wanted Tan Boheng to be responsible, but Tan Boheng refused, and the female student was angry for a while, so she killed Tan Boheng's family, is this really the case? Hey, the so-called teachers now, are like this, and an old professor like Tan Boheng is not exempt from vulgarity after all. ”

“”

Xu Lang sat in the office area of the second criminal investigation team, gently moving the mouse with his right hand, looking at the overwhelming comments, complaining and cursing on the Internet, Xu Lang's face was very calm, he was no stranger to this kind of keyboard warrior thing.

Whenever something happens, those people who don't know the truth always like to express their opinions on the Internet, as for whether these views have a factual basis, whether there is evidence to prove whether these vicious words will bring pain to the deceased and their families, they don't care, as long as their heads and mouths are happy, they don't care about these things, anyway, it's not themselves who die, let alone their relatives.

Yes, when something that has nothing to do with them happens, people pay more attention to these things with the attitude of watching a play, anyway, it didn't happen to themselves, everything doesn't matter, just like the Tan Boheng case, many people on the Internet don't really pay attention to the truth about the murder of Tan Boheng's family, compared to the truth, what they care more about is which lace news made up by media reporters, what Tan Boheng had an affair with a female college student, what Tan Shihao has an improper relationship with a minor female high school student, What Liu Yun is jealous of a certain female teacher and so on.

Of course, under these news, not all of them are malicious speculations, there are still many people who really pay attention to the truth about the murder of Tan Boheng's family, they hope that the police can catch the murderer as soon as possible and give the deceased an explanation, but these words were quickly drowned in the discussion of lace news, and few people really cared about this.

Lu Xing sat next to Xu Lang, he also saw these news, at this time Lu Xing, his face was gloomy like water, his expression was very embarrassed, he looked at the extremely vicious comments and speculations on the computer screen, he said viciously: "What do these people know, just coax there, do they know Professor Tan Boheng?" Do they know what kind of contribution Tan Boheng's family has made to education? What qualifications do they have, where do they twitter? ”

Lu Xing is still too young after all, he is not very old this year, and he sits in the office for a long time, rarely has intimate contact with the outside world, in the face of this situation, he will naturally show righteous indignation.

Xu Lang patted Lu Xing's shoulder and said with relief: "What are you angry with these keyboard warriors, it's not worth it." ”

Hearing Xu Lang say this, Lu Xing still felt very uncomfortable in his heart, as if he had blocked a big stone, which made people very uncomfortable, and he still said indignantly: "If I let me know who these people are, I will already invite them to the Public Security Bureau to drink tea, and let him say these words in front of me." ”

Hearing this, Xu Lang shook his head helplessly, Lu Xing is still too young after all, and this young man's temperament, not to mention that the police don't know who these people who leave comments on the Internet are, even if they know, in the face of so many commenters, can the police really arrest them all? And even if they are caught, on what basis will they be arrested? They didn't kill people and set fires, nor did they do anything to break the law and discipline, so Xu Lang said: "Okay, don't sulk here, or think about how to hurry up and solve the case, finding the murderer is the key, as long as we find the truth, these rumors will be self-defeating, isn't this much better than you sulking here?" ”

After Lu Xing finished complaining, he gradually calmed down, he nodded, and began to do things.

"Gather all of us, let's have a case discussion."

At this moment, Ning Yanran walked out of the office and said to everyone.

After everyone heard this, they all put down their work and gathered around with a notepad, and Xu Lang also moved his chair and came to the crowd.

Most of the members of the second criminal investigation team were in the office area, and Ning Yanran did not have a meeting immediately after they gathered, but was waiting for something.

Xu Lang thought at first that Ning Yanran was waiting for the new director Tian Yongchun, after all, Tan Boheng's case Tian Yongchun was highly concerned, however, to Xu Lang's expectations, the person Ning Yanran was waiting for was not Tian Yongchun, but forensic Ye Xuefei.

When Ye Xuefei came to the second criminal investigation team with a thick folder and sat down next to Xu Lang, Ning Yanran said: "After two days of visits and investigations, let's talk about the situation we have in detail." ”

When everyone heard this, they all looked at each other, and no one chose to be the first to speak, and Ning Yanran, who saw this scene, immediately frowned.

Just when Ning Yanran was about to take the roll call, Ye Xuefei, who was sitting next to Xu Lang, spoke: "There is still a lot of work in the forensic office, so let me talk about it first." ”

Ning Yanran looked at Ye Xuefei and nodded, and motioned for Ye Xuefei to speak first.

"The bodies of the five victims in the 113 case have all been autopsied, and the autopsy results have come out, this is the autopsy report, you can take a look."

After Ye Xuefei finished speaking, she handed the document in her hand directly to Xu Lang.

After Xu Lang took it, he looked at it seriously.

The autopsy report placed at the top is the autopsy report of Fan Ziyao, the No. 1 corpse.

Fan Ziyao, female, 62 years old, the cause of death was that the heart was punctured by a sharp weapon, resulting in cardiac arrest and death, in addition to an obvious wound on the deceased's body, a strangulation mark was found in the position of his neck, that is, a restraint injury, according to the autopsy, it should be the murderer who strangled the deceased's neck with his right hand from behind when he was sitting on the sofa watching TV, so that he could not call for help, and then held a knife in his left hand, and stabbed the deceased's heart with a knife, instantly killing him, according to the location of the body found in the living room, The deceased did not have time to make much of a struggle before he died, and other than that, there were no other external injuries on the deceased's body.

After Xu Lang saw this, what he noticed was not the cause of death of the deceased, but that the murderer strangled the deceased's neck with his right hand instead of his left hand, seeing this, Xu Lang raised his head and looked at Ye Xuefei and asked, "Are you sure that this is the murderer who imprisoned the deceased with his right hand and held a knife in his left hand?" ”

Ye Xuefei nodded and said: "Sure, the murder weapon taken from the No. 1 corpse, according to the perspective of the murder weapon piercing the human body, is a knife held in the left hand, and in addition, we found a mutilated bloody handprint on the murder weapon, which was left by the left hand." ”

Xu Lang raised his eyebrows and said, "The murderer is a left-hander? ”

Ye Xuefei hesitated for a moment and said, "Judging from the way the No. 1 corpse died and the bloody handprints on the murder weapon, the murderer should be a left-hander. ”

Hearing Ye Xuefei say this, Xu Lang just nodded slightly, handed the autopsy report on Fan Ziyao in his hand to Ning Yanran and them, and he picked up the second autopsy report and looked at it.

The second autopsy report was the autopsy report of the No. 2 corpse, Tan Boheng.

Tan Boheng, male, 68 years old, the cause of death was that he had taken coffee containing hydrogen cyanide, to be precise, hydrocyanic acid, and the deceased had no external injuries on his body, so he died of hydrogen cyanide poisoning.

Xu Lang frowned when he saw this and asked, "Hydrogen cyanide poisoning?" ”

Ye Xuefei nodded and said, "The No. 2 corpse, Tan Boheng, and the No. 3 corpse, Tan Shihao, both died of taking this poison. ”

"This poison can kill people instantly?" Xu Lang asked with a frown.

"Yes, Tan Boheng and Tan Shihao immediately fell into a coma and stopped breathing after drinking coffee containing hydrogen cyanide, and died suddenly within a few minutes, obvious symptoms of redness and swelling were found in the mouth and throat of the deceased, the deceased's mouth smelled of almonds, the deceased's skin and mucous membranes were bright red, and the deceased's venous blood was also bright red." Ye Xuefei explained.

"It can kill people in a few minutes, is this chemical easy to get?" Xu Lang asked.

Ye Xuefei shook her head and said: "Hydrogen cyanide is a highly toxic chemical drug, which cannot be bought on the market, and is only used more in some electroplating and mining industries. ”

"Is there anywhere else I can get it?"

"Hydrogen cyanide is also used in industries such as the manufacture of resin tree vinegar, and in addition, hydrogen cyanide is only used in some strictly regulated chemical laboratories, and because hydrogen cyanide is highly toxic, chemical laboratories are very strict in controlling such bottles." Ye Xuefei said.

After listening to Ye Xuefei's introduction, Xu Lang's brows furrowed into the word Sichuan, hydrogen cyanide is a highly toxic chemical drug, it is impossible to circulate on the market, the state has very strict control over this kind of highly toxic thing, basically few people use hydrogen cyanide to kill people, this kind of drug is not good, except for Ye Xuefei said that the electroplating industry and the mining industry and the industry that manufactures resin tree vinegar will use these things, basically only the chemical laboratory will use it when doing experiments.

Tan Boheng's family are all teachers, they are not engaged in the electroplating industry, and it is unlikely that they will have contact with people engaged in this area, which can basically be ruled out, as for the mining industry, S City is a coastal city, not the northwest zone, there is no mining here to mine, even if there is, it is just some small mining industry, Tan Boheng's family are teachers, they are responsible for teaching in the school, and they are not engaged in mineral carbon exploration work, they should not be in contact, however, Tan Boheng is a professor and vice president of S University, He has taken countless students, as for whether any of these students are engaged in the mining industry, further investigation is needed, as for the people who manufacture resin and tree vinegar industry, Xu Lang has almost never heard of it, there will be no one in S City, Xu Lang has not considered these for the time being.

What Xu Lang cares about the most is the last chemistry laboratory, whether it is the university where Tan Boheng and Fan Ziyao are located, or the high school where Tan Shihao and Liu Yun are located, there will be chemistry classes, and naturally there will be chemistry laboratories, and it is normal to have this kind of thing in the chemistry laboratory, but it should be a very small dose, if the murderer is killing people with hydrogen cyanide, then the easiest and fastest way is to take these things from the school laboratory.

Thinking of this, Xu Lang opened his mouth and asked, "Is the basic detailed investigation of Tan Boheng's family clear?" Which of the four of them taught chemistry? ”

Zhu Xumei, who was in charge of the investigation of the visit, immediately said after hearing Xu Lang's question: "Among Tan Boheng, Fan Ziyao, Tan Shihao and Liu Yun, only Liu Yun taught chemistry in high school, and she used to be a graduate student in chemistry at S University. ”

Xu Lang raised his eyebrows, and immediately thought of something, he said directly: "Immediately conduct a detailed investigation of Liu Yun's school and interpersonal relationships, and see if her school has lost the chemical hydrogen cyanide." ”

Ning Yanran nodded, she knew that this kind of investigation was the most correct direction.

After reading Tan Boheng's autopsy report, Xu Lang looked at Tan Shihao's autopsy report again, the cause of death of the two is the same, both died of hydrogen cyanide poisoning, there are no obvious external injuries on the body, and there are no traces of scuffling and fighting, after looking at the autopsy report of Tan Boheng and Tan Shihao, Xu Lang picked up the autopsy report of the little girl Tan Jingjing of the No. 5 corpse.

Tan Jingjing, female, seven years old, the cause of death was mechanical suffocation caused by the neck strangled by a pillow, the little girl suffered from a cold before she died, and the ingredients of cold medicine were found in her stomach, because general cold medicine contains sleeping ingredients, which are easy to make people sleepy, so the little girl should still be in a coma before she died, and the little girl's corpse had no other injuries except for obvious strangulation marks found on the neck.

When Xu Lang was looking at this autopsy report, he suddenly remembered one thing, that is, when he went to the murder scene on the day of the crime, when he saw the little girl's body, he found that the little girl's face was covered by her own skirt, which made Xu Lang a little puzzled, he remembered that when Shu Yue was there, he had inadvertently mentioned to himself a kind of guilt and awe of a murderer.

To put it simply, in many homicides, the victims are basically adults, followed by the elderly, and the least number of victims is children, no matter how cruel a murderer is, when they face children, they will have compassion, and they can't bear to kill children, unless they will do so as a last resort, of course, it is not excluded that those murderers who have pedophilia or are extremely psychopathic, and after killing children, cover the children's faces with something to cover the face of the deceased, In fact, it's not to cover up anything, it's just a sense of guilt and awe at work, often in this case, it is generally an acquaintance who commits the crime, and the deceased knows the murderer, so after the murderer kills someone, in order not to look at the face of the deceased, he will cover something on the deceased's face in one more move.

Thinking of this, Xu Lang asked, "What is the relationship between Tan Jingjing and her mother Liu Yun?" ”

Zhu Xumei thought for a while and said: "The relationship is very good, Tan Jingjing's favorite is Liu Yun." ”

Hearing Zhu Xumei say this, Xu Lang nodded, in this world, children like their parents and relatives the most, and among these people, almost most of the children like their mothers.

After reading Tan Jingjing's autopsy report, Xu Lang finally looked at Liu Yun's autopsy report, compared to the autopsy report of the previous four people, Liu Yun's autopsy report was much thicker.

Liu Yun, female, forty-two years old, the cause of death was a stab in the chest, although the knife did not directly stab the heart, however, it also pierced the new house, resulting in the deceased's death due to excessive blood loss, shock death, in addition, the deceased's right hand was fractured, of which the middle finger, index finger and ring finger were broken by external force, secondly, the deceased's scalp was torn off, the deceased had a large amount of hair torn down, and the deceased's waist was trampled on many times, resulting in the displacement of the spine, and the most surprising thing for Xu Lang was that Liu Yun once had sex-behavior.

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