Chapter 4 Chapter 3 Footprints of Old Cases

Detachment Technical Department, Forensic Medicine Department. The person who received Gu Feifei and Ai Xiaomei was a male forensic doctor who introduced himself as Wang.He is not tall, his hair is thin and sparse, mostly white hair, his face is shriveled and wrinkled, and he looks quite old. He probably participated in the whole case from beginning to end, but he doesn't know that he will be retiring this year and encounter the old case again. What kind of mood would an old forensic doctor repeat. The old forensic doctor was very professional, with a capable personality, and without much politeness, he took the two of them to the dissection room that integrated storage and autopsy, and then took out two drawers next to each other from a row of refrigerators. cabinet, pointing to the corpse inside, and introduced loudly:

"The previous victim was a full-time housewife, her husband and daughter both had normal jobs, and she was alone at home during the day. The murderer should have knocked on the door, cut off the common artery in her left neck, and died of hemorrhagic shock. All of the knife wounds were repaired after death, and the blade of the murder weapon was about 10 centimeters long, 2.5 centimeters wide, and no more than 0.4 centimeters thick, so it might be a jackknife in terms of specifications." "It's very convenient to carry, and it won't attract attention." Ai Xiaomei interjected softly.

"Yes." The old forensic doctor nodded, pointed to another corpse and continued, "This one worked as a room attendant in a star-rated hotel, her husband was a worker in a coal power plant, and her son was studying in a university in other places. He was just off the night shift when he was killed. He died. The reason is also the hemorrhage of the arteries, the knife wounds on the body, the distribution characteristics are very consistent with the previous case and the earlier case, each knife is deep to the handle of the knife, there is no overlap with each other, very calm, very cruel."

"Every cut is enjoyment, so he will remember it in his heart." Gu Feifei continued coldly with a serious face. "Well." The old forensic doctor smiled sadly and said, "In this last case, we found a pubic hair at the scene, which may have fallen off when the murderer was playing with the lower body in front of the corpse at the scene. You also know that pubic hair has follicles Yes, it is very simple to do a DNA test, and the comparison results are indeed in line with the previous case, so my opinion is to join the case.” Later, in the technical department, Gu Feifei saw the red cloth tied around the victim's neck.

A handsome female technical police officer introduced: "The method of tying the cloth strips is similar to the way women tie silk scarves. It reaches above the chest of the victim, and there are bloodstains on both sides. In addition, the cloth strips are new, but they were disposed of by the murderer." However, there are no fingerprints or other physical clues on it, and the incisions are neat and tight. It should be cut from a large piece of red cloth with scissors. The team is investigating the source of the red cloth, and the knife, we are also looking for a sale There are no clues yet.”

"Looking at it this way, the red cloth was brought to the scene by the murderer, and it is part of the fantasy." Gu Feifei concluded. "Should... yes. Could it be that he was stimulated when he saw the victim wearing a silk scarf?" The female policeman looked puzzled, and asked herself, "But according to the family members, although the victim wore a silk scarf in winter, I have the habit of wearing a silk scarf, but I have never worn a red one." "Imagination is not necessarily aimed at the victim himself. A perverted serial killer is basically an 'empathy' crime. Maybe it's a woman he hates or fantasizes about wearing a red silk scarf!" Tsukuru said deeply, and then looked at Gu Feifei solemnly.

Seeing that the little girl imitated Han Yin's style well, Gu Feifei laughed in her heart, but she still nodded heavily in response, and then asked the female police officer, "Who is the victim of the '98·7·30' case?" Strangled to death by a belt, that belt..." "Oh, the belt looks like this." The female police officer opened a photo of the evidence on the computer and said, "It belongs to the victim's family, and it has nothing to do with the murderer. Kuling will test it again for you." "No, I trust your work..." Almost every city in China has a "People's Road", and this road is often one of the high-end financial and commercial areas of the city, lined with high-rise buildings of various styles, each of which is more dazzling and towering than the other. It seems that only In this way, the prosperity of the city can be reflected.Smelting City is no exception. Han Yin and Du Yingxiong are walking on this wide and straight Renmin Road in the center of Xiangyang District.

Walking on the street in dry and cold weather is really uncomfortable. Du Yingxiong shrank his neck, folded his arms tightly, and put the leather hood on his head, with a helpless expression on his face.Ever since Han Yin said that he was going out for a stroll in the morning, he has been wondering. After walking for a while, he didn't see what Han Yin was going to do, so he finally couldn't hold back anymore. He took the weather as an excuse and tentatively said: "It's March. It's the middle of the month, why is the smelting mine still so cold, I should have brought more clothes. Teacher Han, where are you going, why don't we take a taxi? It can be warmer."

Han Yin, who was walking a little ahead, turned his head to look at himself, then at the leather jacket on Du Yingxiong, smiled gently and said, "We are dressed similarly, why don't I feel cold, you can't bear it." Temper?" "No...no, no..." Du Yingxiong hurriedly denied, with a flattering smile on his face, and then tentatively said, "I know you brought me here, you must have a purpose, so just tell me?" "Heh, well. Do you know what are the most appropriate attributes of criminal profiling as an application of psychology? I personally agree with FBI profiling expert Robert Ressler as an art , and art needs subtle intuition and creativity! These two things, the theories in books and the cases I showed you can’t give you, you need the accumulation of real life, experience and practice, which is also common and The difference between excellent criminal profilers." Han Yin didn't solve Du Yingxiong's doubts, but he talked a lot to himself, which seemed to be irrelevant to the case. Of course, this was just a foreshadowing, and then he waved his hands forward He waved, gesturing to look like a road, and said, "Looking at the facts of the case, there are more or less differences in the criminal methods and criminal marks of the first eight cases. The only thing in common is this Renmin Road. Take a closer look. If you look at the azimuth map, you will find that the eight cases are all based on this road as the central axis."

"Oh, then you are going to walk in the footsteps of the murderer?" Du Yingxiong finally got a little enlightened. Han Yin nodded, and said earnestly: "To be honest, this mining trip is probably the most difficult case we have ever dealt with. I don't know very well. I really need to walk the path of the murderer so that I can see clearly. What the hell does he want?" "Hehe, I didn't have the nerve to say it just now, but I'm actually a little self-indulgent in my heart," Du Yingxiong laughed at himself naively, "I thought you came here specifically to train me."

"Of course, this is a good learning and training opportunity for both of us." Han Yin said modestly, thought for a while, and then asked, "Then test you, remember the case about Yang Xinhai I showed you?" ?” "Remember, it was Yang Xinhai who went to the four provinces of Henan, Hebei, Shandong, and Anhui, killing 67 people and raping 23 people!" "Do you still remember the characteristics of the criminal geographical profile of the case?" "Well..." Du Yingxiong recalled a little, and said slowly, "He never committed crimes in the city, all the crimes happened in the suburbs, or more remote rural areas, but he would use the stolen money to spend and have fun in the city , it should be because he thinks he is more familiar with the rural environment?" "Familiarity with the environment is of course one aspect, but in fact there is also a problem of self-confidence." Han Yin explained deeply, "Yang Xinhai was born in poverty, lived in a difficult life, and had relatively poor external conditions. He always had a deep sense of inferiority subconsciously. In fact, he has a typical anti-social personality, which leads him to feel resentment and inferiority towards the city, so the countryside is his psychological comfort zone for committing crimes, while staying in the city, spending extravagantly, and finding escorts are, in his view, a This kind of conquest and revenge." After a pause, Han Yin said back to the topic of the trip: "Let's talk about that case, standing in such a strong urban atmosphere, what did you see?" Du Yingxiong was silent, looking at the endlessly flowing road. Those well-dressed office workers were all in a hurry. It seemed that under the oppression of the surrounding luxurious giant reinforced concrete buildings, the pace was slower and the clothes were sloppier. The place is out of place. It must have been more than ten or twenty years ago, even if it was not so prosperous, the atmosphere was relatively the same.After contemplating for a moment, Du Yingxiong said: "The murderer has repeatedly committed crimes near Renmin Road for more than 20 years. Confidently blending into the atmosphere here, he must have lived or worked here for a long time..." "It's just not enough, I think he should be 'born here and raised here'!" Han Yin added emphatically. "But why did he go to Fuping District to commit crimes again, because the focus of life and work has shifted there?" Du Yingxiong asked. "Maybe, I can only say that the possibility is relatively high." Han Yin replied ambiguously. "That...Mr. Han, I have a feeling, don't be angry if you say something wrong." Seeing that Han Yin's words were vague, Du Yingxiong asked hesitantly, "I rarely see you like this, why do you always feel that you are A little careless about the latter two cases?" "Also—no—yes—la!" Han Yin dragged his voice deliberately, as if to emphasize that there was no preference for one another, "Although the previous case is relatively old, I think it better reflects the personality of the murderer." "Okay, where do we start now?" Seeing that Han Yin was avoiding the question consciously, Du Yingxiong obediently changed the subject at the right time. "I saw the crime scene yesterday. Today I mainly observe the environment around the scene to see if I can find out the fixed pattern of the murderer looking for and tracking the target." Han Yin took out a tablet from his backpack, pressed the power button and quickly Then he called up a map of where the crime occurred, "Since all crimes revolve around Renmin Road, if the usual method is followed, it may be related to this road. Let's walk casually on Renmin Road first." Renmin Road is a north-south main road, from Lantian Road in the south to Yejin Road in the north, with a total length of about 2.5 kilometers. Han Yin and Du Yingxiong walked on this road holding their tablet computers.Every time they come to an area where Renmin Road intersects with the crime scene, the two will stop and investigate carefully: first, they will use measuring tools to mark the precise straight-line distance on the electronic map, and then they will observe the surrounding public facilities and buildings, such as buses. systems, residential areas, governments, enterprises, institutions, or commercial office buildings, etc., trying to determine the intersection of multiple crime areas; at the same time, we consulted the historical data of the smelting and mining area and the external evidence photos of the crime scene in those years. Make some comparisons, so as to avoid the deviation in understanding due to the re-planning of the urban area and the excessive transformation of the surrounding environment.Of course, during this period, the two will also conduct some discussions in combination with the geographical features and the facts of the case... At this time, standing in front of the original site of the Huichun Hotel again, Du Yingxiong said emotionally: "To be honest, we always say 'a wise man is always worried, but he will make a mistake' or 'there is no perfect crime' or something. In this case, there were a total of ten cases before and after, and the murderer did not make any mistakes, and there were no spoilers or witnesses. Moreover, with the way he committed the crime, it was impossible for his clothes not to be stained with blood, but he was never discovered. I have to say that the whole process of committing the crime was really perfect, and luck is great!" "There is no need to be so exaggerated, I can only say that the murderer's patience and caution are beyond imagination!" Han Yin smiled and said lightly, "The point you just made is just our intuitive feeling when we see all the case records at once. As long as the murderer establishes a target, he can always succeed easily. However, if you analyze it deeply, you will find that the previous few cases spanned as long as 14 years. Except for the relatively intensive one in 1998, the rest of them took at least a year to appear. , which will definitely dissipate the tense atmosphere in the city, as well as the people's vigilance and attention. Moreover, the murderer's targets will never be the only victims we saw, probably out of caution and committing crimes Conditional constraints and other factors, he has given up far more than ten times or even dozens of times the number of victims. Of course, his luck is indeed too good, especially the case of the power supply bureau and the hotel, no one has paid attention to it Seeing him is indeed a bit unbelievable.” "That's right, it's amazing, so I think those three cases are of great reference value for determining the identity of the murderer." Du Yingxiong was obviously worried, and when Han Yin mentioned this, he immediately rushed to say, "Just As you said earlier, in the two cases of the power supply bureau, two factors must be met—the murderer can enter the power supply bureau in a familiar and unobtrusive manner, and he must fully grasp the daily routine of the victim and his companions or family members. "For example: First, he knew that one of them lived in the room at the end of the corridor on the second floor of the dormitory, and the other lived in Room 414 on the fourth floor of the office building of the Metrology Institute. Then, he knew that the previous victim worked in the cafeteria, which was different from normal work. The work and rest time are different, so I showed up in the dormitory at around two o'clock in the afternoon, and everyone in the surrounding dormitory was at work at that time. The most obvious is the case of the little girl, her mother was on duty at the dispatch center, Dad is out of the meter field, and the time to get home after work is a little later. In addition, the meter building where the little girl lives is mostly office departments, and there are many people at work. At around 6 o'clock in the evening, when the crime was committed, the off-duty people should have finished walking at that time, and the little girl's father was on his way back from work. With such an accurate calculation, he should know more about the little girl's parents and the situation in the building. ?So I think the two cases of the Power Supply Bureau were not stalking crimes, but full premeditation. "I have read the file and know that the metallurgical and mining police have taken fingerprints of all the male employees of the power supply bureau. It seems that internal crimes can be ruled out. However, I also learned that there were more than 2,000 employees in the bureau at that time, and men accounted for one third of them. Second, such a huge amount of data, it is inevitable that there will be omissions in the collection process. Some leaders and people around the leaders may have special situations. In terms of employees’ family members, people who have business contacts and often go to and from the power supply bureau, and In fact, the residents around the power supply bureau cannot be ruled out. In short, I think the murderer must have some kind of connection with the power supply bureau, and I think you almost think so, so Team Liu was asked to provide detailed information about the family building." Du Yingxiong stopped talking, looked at Han Yin, saw him nodding, and gave a soft "hmm". He didn't know whether he agreed with Du Yingxiong's point of view, or he admired his detailed and in-depth research. Encouraged, he continued confidently: "The murderer of the Huichun Hotel must have had an understanding of the interior of the hotel in advance. We all know that most serial killers are actually penniless guys. Back then, the hotel was good or bad. It is also considered a mid-to-high-end place, and the murderer may not be able to afford it personally, so the insider should be listed as the primary suspect, and then consider the residents at the time and the guests who spent money on the bathing, karaoke and other floors. "To sum up: the murderer may be a family member of the power supply bureau or a nearby resident, but also works in the Huichun Hotel; or on the contrary, lives near the Huichun Hotel and works in the power supply bureau; or he works in the power supply bureau and occasionally Because the unit is related to the consumption of Huichun Hotel..." Du Yingxiong was talking, and suddenly stopped, and after a moment of deliberation, he concluded, "In fact, I agree with the murderer in my heart. Get into the car quickly, so that it is difficult to be found even if there is a little blood on his body. Therefore, if the scope is narrowed down, I boldly speculate that he may be the driver of the power supply bureau. This is in line with the time when he committed the crime Mostly during the day, and always on weekdays, because the car is his good concealment, and he may need to return the car to the unit on rest days. Oh, I checked. Although the hotel incident happened on a Saturday, it is approaching During the Spring Festival, the country has a unified holiday, and that day is also a working day." Du Yingxiong finally added deliberately. "That's a good idea. Team Liu can investigate the drivers of the power supply bureau, but I actually have a little disagreement." Han Yin looked relieved, because he really felt that Xiao Du's comeback was indeed much more sophisticated than before, but he I have already had a relatively mature view on the Huichun Hotel case, "Xiao Du, I don't know if you have found out. In the entire case, including the hotel case, there are several cases where the murderer's fingerprints were not extracted. Take a closer look at the case." If you send the time, you will find that they all happened in winter, which means that it is not because the murderer has become smarter, but because the weather is too cold and he needs to keep warm. In this way, the murderer should have come from outside the hotel at that time, as you said The 'identity of the driver' is worth exploring." Originally, Du Yingxiong was still a little proud of the hearty analysis just now, but he didn't expect Han Yin to almost overthrow his inference with just one tiny detail, and those things are clearly recorded in the file , he never noticed.He really had to admire Han Yin's study of the details of the case, and once again deeply realized that he was still far, far away, so he was stunned for a while. Seeing that Du Yingxiong was standing still, Han Yin hurriedly explained: "The more you argue, the clearer the truth. It will only benefit the case if you speak out your ideas and discuss it together. Small mistakes are also normal. Discuss like this often!" "Okay! Okay!" Du Yingxiong came back to his senses, as if he was motivated enough, "Then let me ask the previous question again: If the murderer didn't drive himself to commit the crime, how did he leave the scene calmly? The traces of committing crimes were not found on the body? It should be impossible to take a bus or take a taxi, could it be riding a bicycle?" "It shouldn't be difficult to do this. He can follow Yang Xinhai's example and choose to walk away from the scene after committing the crime." Han Yin replied. "Yes, if he really lives near Renmin Road, then his residence is not too far from all the crime scenes, about an hour is enough!" Du Yingxiong suddenly came to his senses, thought for a while, and then asked, "Actually As far as skillful criminal methods are concerned, I originally had an assumption—the murderer has been clean and neat since the beginning of the crime, and has never missed a hand. Does he have a criminal record or military service experience? Especially There are many military enterprises in the mining city, will he hide in those enterprises after retiring or changing jobs, so it is difficult to track down?" "I don't think so. It can't be ruled out that he committed some other crimes, but he must have never been caught, otherwise the metallurgical police would have connected the evidence over the years. Besides, he doesn't need professional training. I have said many times, never question the talent and ability of a perverted killer to use a murder weapon! Just like the 'BTK killer', his first crime was to kill a family of four without delay..." Han Yin said. In the afternoon, the situation changed suddenly. The sky was covered with dark clouds in an instant, and it was raining in an instant, but the small town of Mining and Mining did not feel refreshed because of this. Instead, it cast the shadow of the murder case again. This time, the murderer fled back to Chaoyang District. The scene of the crime was Room 301, Building 144, Xiangruijiayuan (Cotton Textile Factory Affiliated Court), No. 309 Gongnong Road, Xiangyang District. It was less than one kilometer away from Renmin Road, so he was nearby When Han Yin and Du Yingxiong arrived after receiving the news, Team Liu, Gu Feifei and others were still on the way. In the wet and cold weather, the room was particularly dull, and the smell of blood became even more pungent.The house is oriented north-south. A young girl in her twenties lay in a pool of blood in the middle of the living room. The big bloodshot eyes, trying to open, stared at the ceiling, the eyes were innocent and surprised! "According to the reporter, the victim's brother-in-law, the victim's name is Liu Yanjie, a 28-year-old worker in a cotton spinning company. The child, the two old people went to take care of the confinement, so the victim lived alone for the time being." The police from the police station who arrived at the scene earlier walked away after introducing the victim. Han Yin nodded and said hard, then walked around the room, then walked to the corpse, squatted down, and stared at the victim's neck , take a closer look... Not long after, Team Liu, Gu Feifei, the forensic doctor, Ai Xiaomei and others also arrived.Han Yin looked at Gu Feifei with a flat face, got up and stepped aside, Gu Feifei and the forensic doctor started a series of on-site preliminary examinations. The cause of death was simple and clear: the large blood vessels in the victim's neck were severed, severe blood loss, spot-like blood spots appeared in both eyes, and the surrounding blood stains were mostly splattered. It was preliminarily judged that a large amount of internal bleeding formed a hematoma, which compressed the trachea and caused suffocation. In addition, the liver temperature showed that the time of death was around 9:30 in the morning, and there were no scratches on the arms... On-site investigators extracted several fingerprints in the room, which may have been left by the victim and family members from the location. To be compared, other than that, there is no physical evidence about the murderer found... As soon as Gu Feifei entered the room, she noticed Han Yin's eyes at that time. She followed the eyes and put her gaze on the red cloth strip tied around the victim's neck.After a while she had the answer, she stood up and frowned and said to Han Yin, "The red cloth strips are tied in a different way, that is, two knots are simply crossed." Han Yin nodded slightly and smiled: "Leave it to Team Liu, let's stop wasting time, it's an imitation crime!" "Don't, don't, don't! Why did you imitate the crime?" Dui Liu hurriedly grabbed Han Yin and said with surprise, "The modus operandi is very similar, the time period of the crime is similar to the previous one, and the gender and age of the victim It is consistent with the previous years, especially the act of tying the red cloth, which can explain the problem better - in the previous case, the details of the case were kept strictly confidential. The outside world only knew that the murderer had come out to commit crimes again, but they did not know that the red cloth The existence of the article and the difference in the law may be because it was too hasty at the time?" Han Yin didn't respond in a hurry, looked at Du Yingxiong opposite, took out the tablet from his bag, called up the case record and handed it over, then raised his chin lightly, and said calmly: "What do you think? Tell me! " Du Yingxiong took the tablet and understood that it was a reminder from Han Yin, so he quickly flicked the screen to look it up, and his brain quickly sorted out his thoughts, and then said: "Suppose this case was also committed by the previous murderer. , then looking at the entire series of cases, there are four cases without fingerprints and physical evidence, namely: the third case of '98·1·13', the fourth case of '98·1·19', the ninth case of this year'1· 20', and the case in front of me. Mr. Han Yin had given me a hint earlier, which may be because they all happened in winter when the temperature was low, and the murderer wore gloves. However, the first three cases all showed obvious signs Behaviors, such as the deliberate positioning of body positions, the exposure of breasts and lower body, the act of stabbing the corpse with additional sharp objects, especially the method of mutilating the corpse, almost ran through the entire case. That is to say, only this case now has no Any fingerprints, physical evidence, and criminal marks..." At this point, Du Yingxiong raised his hand when Liu Dui wanted to refute, and rushed to say, "I know that the red cloth strip you want to mention is also a criminal mark, of course, But you also said that it felt like the red cloth was fastened in a hurry, but in fact it was perfunctory to be precise. He couldn’t understand the meaning of this behavior at all. This is actually a very patient ritual with pleasure in every link... ..." "Wait..." Liu Dui lowered his head and pondered for a moment, his eyes flickered quickly, and then he raised his head and said, "No, I remember that in the case of the little girl and Huichun Hotel, the murderer never mutilated the body." "That, that..." Du Yingxiong was momentarily at a loss for words. "But in those two cases there were corpse rapes, which is probably more intense than the pleasure brought to the murderer by destroying corpses." Seeing that the hero was dumbfounded by Liu Dui's rebuttal, Han Yin said immediately, "You just mentioned The two cases reported by the Ministry of Public Security and the other case of the Power Supply Bureau, from the point of view of criminal markers, were indeed insufficiently enforced. The reason for this is that in the entire series of cases, only these three cases did not occur in the victim's private residence. , but a relatively public area, so it is understandable that the murderer has some scruples... Also, don't you think that the crime time of this case was almost at the same time as the previous case, is it a bit too deliberate?" Han Yin finally I specifically emphasized one sentence. "Well, I admit that my old ideas can't keep up with the thinking of young people like you, but if it's really imitation, it's easy, and we have to interpret the situation at the scene from a different angle!" Team Liu said himself The concept is always just modesty. How can a person who can take the position of the detachment leader be an idler? After a little advice from Han Yin, he immediately clearly grasped the direction of the next investigation, "There is no trace of breaking the door, and the blood is concentrated. In the middle of the living room, the victim did not resist or restrain himself, indicating that an acquaintance committed the crime, and this "acquaintance" knew the situation of the previous case very well, so he either came from within us, or had contact with the family members of the victim in the previous case. The former It can be ruled out for the time being. Deliberately keeping the time of committing the two cases at the same time seems to be too lacking in anti-investigation awareness. Therefore, the murderer in this case should be hidden in the victim's social interaction. There is an intersection, is that what you mean?" "Yes!" Han Yin smiled and nodded vigorously to show his approval. Team Liu regained his carefree look, waved his hand at Gu Feifei and said, "This case is considered particularly bad, but it's far worse than the serial cases we handled. Teacher Han is right, you don't need to waste your energy here." , or sort out the serial cases according to your rhythm as soon as possible, and let me just keep an eye on it!" "Okay, let's divide the work here, and communicate if there are any problems!" Gu Feifei responded. The four of them left the scene, got into the car, and did not drive away immediately. Instead, they roughly exchanged ideas about their respective investigations in the morning.After that, Gu Feifei, who was holding the steering wheel, asked what was the next arrangement. Han Yin thought for a while and asked Gu Feifei to put him and Du Yingxiong down on Renmin Road. Ai Xiaomei went back and searched Weibo and blogs, as well as some popular online forums, to see if she could find posts and remarks that paid special attention to the serial rape and murder case in the metallurgical mine recently. Of course, if there were only the first eight cases, Han Yin would not have contacted the Internet, but now it is different, and the personality of the murderer has changed drastically. ways to communicate with the outside world.If he is really found on the Internet, perhaps the area where he hides or is often active can be directly traced through the IP address. Communication method - the important thing is that he doesn't know who he is communicating with.