In the rental house where Ding Jiayi was killed, the police did not give up the search, but carefully searched all the corners and items in the house, down to a single hair, and never let go of any traces of water. To be honest, with so many lessons from the past, it is not very likely that obvious traces will be found, so although everyone works hard, the expectations are not high. However, to everyone's surprise, they soon found out that there was a lot of murder evidence in this small rental house, and it seemed unbelievable, and the police immediately notified Xu Jingnan to come to review it for the sake of prudence.

After Xu Jingnan arrived, he learned about the situation in detail, and it turned out that several fingerprints were extracted from the switch of the gas stove on the gas pipeline, and after comparison, these fingerprints did not match Ding Jiayi, nor did they match Ji Zhuo's. According to the landlord, these things have not been used by them, and they are new equipment that Ding Jiayi replaced after moving in, so there is no possibility that the previous tenants encountered them. After an investigation of the landlord, this statement was also confirmed, and the fingerprints did not come from the landlord. On the ground of the rental house, a lot of footprints were also extracted, although they were not complete, but the size of the foot could be easily determined, and it would not be an adult man's, so that the landlord and Ji Zhuo were excluded again, and then compared with Ding Jiayi's feet through technical means, and it was not her footprints.

received the investigation report that Xu Jingnan finally got at the scene: the fingerprints and shoe prints were from outsiders, and they were probably left by the murderer. This made Li Yiting and Chen Tianyu very surprised, and they even couldn't believe that this would be left by the murderer. Because in the entire series of cases, the murderer can be said to be very clever, and he almost did not leave his own clues at the scene, otherwise it would not have made everyone guess that it was not artificial for a long time, but this time it is completely different, the murderer would easily make such a low-level mistake.

Li Yiting felt that this was an unlikely thing, judging by the caution of the murderer in the previous cases, this person was cautious in doing things, and the design was very ingenious, if it was a mistake, it was a bit far-fetched, not to mention that it could leave so many fingerprints and footprints down, this was not the murderer's style at all. If he had to explain, Li Yiting thought of a possibility.

So he told on the phone, "Jing Nan, could these clues be deliberately left by the murderer, pretending to be his own shoes and fingerprints?"

Xu Jingnan also thought of this layer, "Teacher, this possibility does exist, but it only needs scientific and technological means to identify it." ”

"Well, you immediately take these fingerprints and footprints to the technical department for identification, remember not to be led by the murderer's nose, so as to divert your attention, otherwise it will increase the difficulty of detection. Li Yiting reminded him.

"Okay, teacher, don't worry!" Xu Jingnan quickly brought back the footprints extracted from the scene, analyzed and compared them with professional instruments, and finally determined that these footprints came from a woman who was about 1.62 meters tall, weighed about 130 pounds, and had a foot size of about 36-38, and he immediately reported the results to the Beiting Detective Agency.

This data makes everyone very puzzled, the height is in line with Ding Jiayi, but the weight is obviously too different, Ding Jiayi is tall and tall, and she is not as heavy as one hundred and thirty pounds, so it is definitely not her footprints. In other words, at the scene of the crime, someone else really went in, and this person was a fat woman of more than 130 pounds. Judging from gender, whether it is Liu Xiaoquan, Yege, or Zheng Xing, they have all been directly excluded, and the appearance of this clue has made everyone even more dizzy, and it seems to have completely negated all previous judgments.

Who is this woman?

Li Yiting then asked Guan Shaoxing to assist and retrieved the surveillance near the rental house, but there are many people entering and leaving the nearby roads every day, and it is difficult to see who is suspicious for a while, even if you only look at women, the number is very large. Li Yiting asked Shen Mingyue and Liu Zichen to cooperate with the police to specially select eligible adult women, that is, fat adult women who are 1.62 meters tall and weigh more than 130 pounds, and let them go all out to find this person in the camera.

At the same time, the police made a breakthrough in the investigation near the scene, and several elderly people who exercised in the morning did see the face of a strange woman not far away when they went out for morning exercise in the early morning. Since it was not yet the rush hour at that point in time, there were very few young people who went out, and they were generally acquaintances who exercised in the morning, so the strangers who appeared under the blue bridge caught their attention. According to the descriptions of the elderly, the results of the comparison of body size, height and footprints were very similar, and the woman was looking for something, looking left and right, and did not seem to be very familiar with the local situation. After the woman noticed that someone noticed her, she lowered her head and quickly turned to the other side, but unfortunately, due to the distance and the eyes of the old people were not particularly good, they did not see the woman's face clearly, but from the outline and clothing analysis, it should be in her thirties and less than forty years old.

Li Yiting felt that this clue was very valuable, so he asked the police to ask the woman about the characteristics of her clothing, according to their recollection, the woman wore a hat and a coat, the color was relatively light, and the specific details could not be seen clearly. As for the shoes, no one is impressed. According to these descriptions, Li Yiting can imagine that since those old people have seen the clothes but have no impression of the shoes, it can only mean that the shoes are very inconspicuous, and they must not be the boots and high heels that middle-aged women like to wear, but should be very ordinary sneakers or flat shoes, so that they are not easy to attract attention when worn under their feet. He immediately asked Xu Jingnan to confirm that the footprints found at the scene of the crime, whether he could know what type of shoes they were, Xu Jingnan immediately responded that they were flat sneakers, because the veins were very clear, and there was absolutely no heel or anything like that.

From this, Li Yiting basically determined that the strange women seen by the old people should be the women who sneaked into the rental house and left footprints, and they are also very likely to be murderers. So he directly notified Shen Mingyue and Liu Zichen of this clue, and asked them to focus on finding the middle-aged fat woman who appeared between six and seven o'clock in the morning, wearing a hat, a light-colored coat, and sneakers. This range has been greatly reduced, and sure enough, Shen Mingyue's heart is bright, and she soon saw this person's shadow in the corner camera of a street next to the Blue Bridge. Shen Mingyue took a screenshot of the video and sent it to the police, and after asking the old people at the scene to confirm that it was correct, the true face of the suspect was finally about to surface.

However, to the disappointment of everyone in Beiting, although they found the trace of the fat woman who entered the rental house, due to the high position of the camera, and some fog in the early morning of the same day, the lens was not clear, and the appearance of the woman that could be shown was similar to what the old people described, all of which were very blurry, and could not intuitively show the specific appearance, so it was impossible to determine her true identity.

Now that the evidence has been conclusive, the pursuit must be launched, Beiting contacted the police, began to set up cards to intercept the city, and prepared to issue a wanted warrant and a reward warrant, and she must be arrested. However, to everyone's surprise, just when Beiting and the police were trying their best to track down this suspicious woman, she actually took the initiative to come and surrender!

What is even more unexpected is that this woman is not a mysterious person hiding in the shadows, and many people in the Beiting branch have also had contact with her. She is the wife of Tong Minghai, the second deceased in the Grim Reaper series of cases, Zhuang Cong!

At the beginning, the big guy didn't want to believe that she was the murderer, especially Liu Zichen, who had accompanied and protected Zhuang Cong alone for a period of time after the disappearance of Tong Minghai's girl Yangyang, and couldn't accept the conclusion that she was the murderer. But Zhuang Cong's dress is exactly the same as what he saw in the surveillance and the old people's descriptions, brown beanie, brown coat, gray sneakers, this is unbelievable, she is indeed an outsider who entered the rental house in the early morning and left footprints and fingerprints.

The interrogation immediately began, Zhuang Cong came to surrender, naturally she didn't plan to hide anything, and without waiting for Li Yiting to ask back, she took the initiative to explain the whole process of killing Ji Zhuo and Ding Jiayi.

It turned out that about the adultery between Tong Minghai and Ding Jiayi, not only Ji Jing found out, but even Zhuang Cong had known about it for a long time. The two of them were junior high school classmates and had always maintained a good relationship, but later maybe Ding Jiayi was abandoned by Ji Zhuo, and Tong Minghai took the opportunity to get involved with her. In fact, if Ji Zhuo maintains that abnormal relationship with Ding Jiayi in private, then Tong Minghai and Ding Jiayi are even more intimate, he is not like Ji Zhuo who has to take care of his status, so he is more casual and open-minded, relatively speaking, the degree of confidentiality is low, in fact, there are many people who know, but Zhuang Cong has also been reluctant for the sake of his daughter Yangyang's young age.

Although Tong Minghai is sorry for himself, he loves his daughter very much, especially when it comes to going to school, Tong Minghai can be said to be heartbroken. This point, Zhuang Cong saw in his eyes, and it was also the main reason why she did not have a quarrel with Tong Ming, as long as her daughter can be happy, she can endure more grievances as a mother. Because of the age problem, Tong Yangyang would have to wait one more year if he wanted to go to school, and their whole family was unwilling to waste time, so Tong Minghai thought of a lot of ways, especially several times to ask Ji Zhuo, who was in an important position, hoping that he could help him.

But it backfired, and before the matter of her daughter's school was settled, her husband died for no apparent reason. Zhuang Cong was very sad and thought that the culprit was Ding Jiayi, and she felt that if it weren't for this woman who had an inappropriate relationship with Tong Minghai and Ji Zhuo, her husband might not have suffered this catastrophe. And she also heard about the situation at the scene, it was Ding Jiayi who saved Ji Zhuo, which led to the subsequent incident, Zhuang Cong thought that Ding Jiayi indirectly killed Tong Minghai, and at the same time angered Ji Zhuo. In the case that the murderer is unknown, her daughter Yangyang disappeared and was almost murdered, Zhuang Cong, who endured great suffering, couldn't think about it for a while, she couldn't hold it anymore, and was determined to let the adulterer ** go to Huangquan together regardless of the consequences.

The process of committing the crime, as speculated by Li Yiting and others, was not complicated. First of all, she used the matter of Tong Yangyang going to school again, asked Ji Zhuo to meet at home, and poured a relatively small dose of cyanide into the coffee poured to him, a trace amount of poison will not immediately cause the other party to die, but after a long time, it is not necessarily, she definitely can't let Ji Zhuo die in her own home. In addition, Zhuang Cong was merciful at that time, and he also had the last glimmer of hope, if Ji Zhuo could really agree to arrange for Tong Yangyang to go to school, then she could also give up her revenge plan for the sake of her daughter.

Ji Zhuo didn't realize that he was in a crisis, he still showed his usual style, and treated Zhuang Cong perfunctorily like Tong Minghai, which completely angered Zhuang Cong and made her give up her last hope.

After Ji Zhuo left, Zhuang Cong secretly followed not far behind, followed all the way, followed Ji Zhuo from his own home in the city, and finally found that he went to the rental house near the Blue Bridge, and saw Ding Jiayi inside through the window, she finally found Ji Zhuo's whereabouts, which happened to be with Ding Jiayi, so she decided to start.

After returning home, Zhuang Cong first cleaned up the cup and raw materials contaminated with poison and sealed them under the bed. I waited at home until the middle of the night, and I guessed that there would be no more people on the street, so I went out and rushed to the rental house next to the Blue Bridge. Zhuang Cong brought demolition tools and was ready to forcibly break the wooden door of the room that he did not know in the rental room, but he was worried about the noisy people sleeping in the house, so he did not dare to use a lot of strength in his hands, and his movements were relatively gentle, which also led to a long time before he successfully knocked on the door lock. Walking inside, she went straight to the kitchen, opened the gas valve, and then lit the gas stove, and immediately extinguished the open flame on the gas stove with water, so that the gas kept leaking out. Zhuang Cong then left, and changed the door lock to a new one to confuse the view.

After she came out, it was already dawn, and she was bumped into by the group of old people who were exercising in the morning. As for Ji Zhuo's words, he may have sensed the danger and fled quickly, but due to inhaling carbon monoxide and poisoning the coffee, he died on the Blue Bridge.

Zhuang Cong unreservedly revealed his motive for committing the crime and the entire process of committing the crime in great detail, and asked Beiting to send someone to his house to dig out the poison residue under the bed, which can prove that she is the murderer. If someone can say so realistically and can't find anything unreasonable, and can also provide physical evidence of the murder by himself, this can only be done by the real murderer, Zhuang Cong poisoned Ding Jiayi and Ji Zhuo, the physical evidence is sufficient, and I have pleaded guilty, this case is undisputed and can be qualified.

But for the five previous murders, Zhuang Cong denied all of them, and Beiting had no evidence to testify against her. What's more, she took the initiative to recruit people to kill two people, and there was no need to hide other crimes.

This sudden change has made everyone fall into a tangle, is there no connection between these murders? The murderers of Ji Zhuo and Ding Jiayi's deaths are almost certainly not the same person as the previous ones, so will the murderers in those cases also be committed by different people?