After receiving Wan Yongkun's report, Chen Tianyu was even more worried. If Yege is really innocent, he is only related to Tong Yangyang's disappearance, and he is also the one who saved people, then there is a huge loophole in the previous reasoning, and they are also ill-considered for the red notice issued by Yege.

Now it seems that the suspect is once again locked on Liu Xiaoquan's body, Yege is not his accomplice, and he doesn't even know the other party, so is the entire series of murders done by Liu Xiaoquan alone?

According to Yege's testimony, on the morning of Tong Yangyang's disappearance, an outsider came to the Jinhaiyuan community, that is, Zheng Xing, who was followed by Yege. Before that, the Beiting Detective Agency didn't pay much attention to him, and it wasn't until he was asked to provide information about Liu Xiaoquan that he came to the Beiting Branch. Chen Tianyu still remembers the meeting scene that day, Zheng Xing's views on Liu Xiaoquan are very different from everyone else, which also aroused his doubts at the time, but he did not pay too much attention to it. But now that he appeared near the scene of Tong Yangyang's attack, if he was connected, he had to make people suspicious. The role played by Zheng Xing makes people look at the fog, it seems that he can be found more or less everywhere, but there is no evidence to prove that he is involved in the case, and Zheng Xing has not been found to have the slightest motive for committing the crime, and even took the initiative to clear the suspicion of Liu Xiaoquan, the biggest suspect in this case. Chen Tianyu did not guess, was this person really a blank sheet of paper, or was he a master of disguise? Chen Tianyu was determined to properly investigate the true situation of this Zheng Xing, so he immediately asked Guan Shao Xing to assist in handling this matter as soon as possible.

Li Yiting quickly brought all the information about Zheng Xing collected by the police back to the Beiting branch, and he searched with Chen Tianyu, which included Zheng Xing's background information, his education experience, and his work experience after graduation, plus some certificates such as no criminal record. The two of them carefully checked everything they had gotten, but the end result was very disappointing to everyone.

Zheng Xing was born in an ordinary family in a small county, without any criminal record, he was admitted to the same prestigious university as Liu Xiaoquan through his own efforts, the two are not the same major, but they are also alumni and familiar with each other in school. The whole person is diligent, down-to-earth, steady, and Liu Xiaoquan is completely different, even if he goes to college, Zheng Xing still persevers in struggle, in addition to the top grades in professional courses, English passed the sixth level and the oral test, and also minored in the second, the computer has also reached the third level, and there are many honors outside the classroom, and even published professional papers on well-known academic forums.

After graduating, due to his excellent grades and good reputation, Zheng Xing has become a hot talent in school recruitment, and finally after thousands of selections, he followed the crowd to work in a large company with a medium income. Zheng Xing worked diligently, was repeatedly praised and appreciated by the upper echelons, and it didn't take long for him to be promoted, and his welfare benefits also rose, which was considered a high level in the same class. Shortly after he was promoted, Liu Xiaoquan approached Zheng Xing, hoping that he could work part-time as his sister Liu Xu'er's tutor in his spare time.

Originally, Zheng Xing did not agree, because his work was still relatively busy at that time, and he was in the rising stage, and the future was promising, so he was a little lacking in skills. But the Liu family had heard about Zheng Xing's past and had great expectations for him, so they asked Liu Xiaoquan to make every effort to promote it, and also provided a very good remuneration. In this way, under the repeated requests of alumni, Zheng Xing really couldn't shirk it, and reluctantly started his part-time job.

For Yuan Hui'e, she is extremely concerned about her daughter's education, and Zheng Xing has not escaped her eyes with her words and deeds when she arrives at home. As a result, Yuan Hui'e found that this alumnus of the same class as Liu Xiaoquan was indeed extraordinary, not to mention rich knowledge, but also very patient, and the communication with Liu Xuer was also very smooth, and her daughter made great progress in a short period of time after his tutoring, all of which made Yuan Hui'e admire Zheng Xing even more. It's just that because Zheng Xing is very busy, the number of times he comes is relatively small, so she simply proposed to Zheng Xing and asked him to quit his job in the company and serve as Liu Xu'er's tutor full-time, and offered an extraordinary salary.

Zheng Xing was finally moved, and when his career was on the rise, he resolutely resigned, signed a two-year contract with Yuan Hui'e, and then devoted himself to the education of Liu Xu'er. Do the math, so far, the part-time time to go to the Liu family is nearly three years, and the full-time time is less than a year. In such a long period of time, Liu Xu'er's academic performance and all aspects have improved by leaps and bounds, so that the people of the Liu family are very satisfied, Yuan Hui'e once said that her daughter's achievements also have a credit to Zheng Xing, so the people of their family are respectful to Zheng Xing.

With such a perfect resume, he really can't find any fault, let alone the need to commit murder. Zheng Xing has excellent intelligence, a good salary, a good reputation, no negative press, and everything seems to be impeccable. He and Ji Jing are alumni of the university, but they are not familiar with each other, in addition, everyone in the Ji family and the Tong family, Zheng Xing has no intersection, how can he kill those people?

As for the Liu family, not to mention, the relationship with Liu Xiaoquan has always been good, and he is the tutor of Liu Xiaoquan, and he has been working for four years. He has an ordinary employment relationship with the Liu family, and Yuan Hui'e, as an employer, has always been very good with Zheng Xing, and has taken special care of him both materially and spiritually, and has not found any contradictions at all. In this case, if Zheng Xing is the murderer, then his behavior seems to be harmful to himself and not beneficial, it is completely harmful to others and not beneficial to himself, I believe that any normal person would not do such a stupid thing, let alone a person like Zheng Xing who has both talent and morality.

Regarding Zheng Xing's resume and behavior, Chen Tianyu and Li Yiting met in private several times, but they did not find any flaws, and they all agreed that Zheng Xing did not have a reason to become a murderer, so they did not treat him as an important suspect. Now it seems that everything about Zheng Xing is excellent to the extreme, and if you have to find a problem, it seems to be too perfect and flawless.

Things are back to square one, and they once again turn their attention to the biggest suspect at present, Liu Xiaoquan, who is suspected of having a split personality. If all the motives are attributed to illness, it seems to make sense that his six relatives did not recognize him, and even killed his own father. Chen Tianyu hopes to deduce from the beginning, using a rarely used method of inference of guilt, assuming that Liu Xiaoquan is the murderer and has no helpers, so how did he kill so many people?

The first deceased, regardless of the old man in Binjiang Park, this case did not find any suspicion whether it was the scene or the autopsy, and he did not have the slightest connection with the other deceased.

The second deceased, Tong Minghai in the Musical Fountain Square, needs to remember a premise, that is, the damned person here may not necessarily be him. After the broken car started, it was Ji Zhuo who rushed first, and it could not be ruled out that the murderer himself was targeting him, but due to the appearance of Ding Jiayi, this step was interrupted, causing the vehicle to continue to move forward and knock down Tong Minghai not far away. If Liu Xiaoquan is the murderer, he needs to break the car first, and then create chaos and let the forklift drive towards Ji Zhuo. But the problem is that if there is no Ding Jiayi, then Ji Zhuo may have been hit and killed by a forklift, then he will not go to the fountain again, and he will not need to turn on the switch. There seems to be a loophole here, does Liu Xiaoquan want to kill Ji Zuo or Tong Minghai? If he kills Ji Zhuo, it will be a superfluous move to open the fountain in the future; if he kills Tong Minghai, then Ji Zhuo's appearance will be an accident, but if there is no Ding Jiayi, wouldn't he kill Ji Zhuo by mistake halfway. Once Ji Zhuo died, the forklift would not crash forward into Tong Minghai, so Tong Minghai would not die. The appearance of the two of them contradicts each other, and they don't seem to be able to justify themselves, and they don't know what Liu Xiaoquan's true purpose is.

The third deceased, Hou Hong in the vegetable market, her situation was relatively simple. If Liu Xiaoquan is the murderer, then the roast duck oven that caused Hou Hong's death was specially arranged by him, the market is full of people every day, and no one will be too concerned with a person dragging the roast duck oven, maybe he placed it in a very early position, and the angle and height of the hook are completely tailored to Hou Hong's height. As for other factors, such as the water on the ground, the broken fan hanging on, and the scales at the corner of the seasoning area, these things have always been in the market, and Liu Xiaoquan could have stepped on it a long time ago and controlled it through precise calculations. Even if Hou Hong was not choked by the chili powder, he may have been affected by other arrangements, so he walked outside in a hurry.

The fourth deceased, Liu Changshou in the beach barbecue garden, this is a case that opens up the situation, and it is precisely because of Xu Jingnan's repeated investigation of this place that he discovered the first physical evidence in the Grim Reaper series of cases, the steel thorn that should not have appeared, thus helping Beiting characterize the case as artificial. Assuming that Liu Xiaoquan is the real murderer, then he is eating barbecue in that place, which is very convenient to operate, as long as he mixes in the murder weapon that has been prepared a long time ago while people are not paying attention. And Liu Xu'er went to the beach to play and fell into the water, obviously an accident, if Liu Changshou failed to save her and drowned, maybe there would be no need for follow-up. After Liu Changshou returned safely, Liu Xiaoquan continued his plan and aimed the steel thorn at the door when his father went to change clothes. But there are two questions here, first of all, after Liu Xu'er and Liu Changshou went to change clothes, their barbecue grill caught fire, Liu Xiaoquan went to extinguish the fire with Yuan Hui'e, at that time he had no way to go to the changing room, and after the fire was extinguished, Liu Changshou came out and was poked to death, this time Liu Xiaoquan was still in everyone's sight, so he had no way to assassinate Liu Changshou on the spot; secondly, according to Xu Jingnan's speculation, the steel thorn was not thrown by hand, it should be a bow or a spring or something like that, so Liu Xiaoquan can indeed prepare the launching mechanism first, and arrange it in secret, and shoot it automatically after Liu Changshou comes out of the men's changing roomHowever, the transmitter does not have the timing function, let alone the ability to identify the human body, how can it know that it must be Liu Changshou who comes out at that time? It may also be Liu Xu'er or other people who come to change clothes, I am afraid that there is no way to distinguish so accurately by tools!

The death of the fifth deceased, who was in a suburban alley on the second day, was very clear. After chasing the little girl inside, Liu Xiaoquan, Fat Man, and Yege all appeared there, but Erri didn't realize that he had appeared in the eyes of so many people. Subsequently, the little girl bravely escaped, at this time Erri stayed in the dead end, Liu Xiaoquan, who had been secretly ambushed for a long time, climbed to the wall in time, and took advantage of the little girl to attract attention on the second day, threw the brick from above, and hit Erri's forehead.

Taking 10,000 steps back, if there are still theoretical possibilities and reluctantly said calls before, then when it comes to the sixth and seventh deceased Ji Zhuo and Ding Jiayi, Liu Xiaoquan's words as a murderer have absolutely no chance to do it, which is also what makes Chen Tianyu completely confused.

Ding Jiayi and Ji Zhuo died by the garbage can on the Blue Bridge, and the other died in a rental house near the Blue Bridge. According to the forensic report, they all died of poisoning, and they should have been killed together, as for why Ji Zhuo was able to leave the rental house to the Blue Bridge, there must be another hidden reason. But the death of the two of them does not need to consider the problem of the way of committing the crime, anyone can do the poisoning thing, there are many ways to mix it in the water, inject venom while sleeping, etc. It is not difficult to enter the house and turn on the gas, like Liu Xiaoquan, Yege, and Wan Yongkun, they can all sneak into the house quietly, and then turn on the gas, create the illusion of turning it on and leave.

But the problem is that according to the results of the forensic examination, the time of Ding Jiayi's death was 7 o'clock in the morning of the same day, so Liu Xiaoquan could not go to Lanqiao at all. Because at the same time, he was obviously with Shen Mingyue in his distant and remote hometown, and that morning, Liu Xiaoquan personally sent food to Shen Mingyue. According to Mingyue's statement, Liu Xiaoquan's daily life is very regular, and every morning he brings himself breakfast between seven and seven twenty, there is no doubt that in just twenty minutes, he will never have time to rush to the Blue Bridge dozens of miles away from such a distance to kill people. Therefore, if the deaths of Ding Jiayi and Ji Zuo can be regarded as a continuation of the Grim Reaper series of cases, then Liu Xiaoquan's inference as a murderer has been drawn with a big question mark.