"The door has traces of being pried open." Fang Zhenyue was carefully observing the keyhole while unlocking it.

The door opened with a click. He pulled the door open while pointing to senior chemist Chen Guangyao: "Mr. Chen, look here, the metal scratches are very obvious, and the scratches are still very new."

After all, the wounds on the metal after being cut are bright. Judging from the color of the scratches on the keyhole, it can be basically confirmed that it was caused by the murderer.

When Fang Zhenyue was unlocking the door, he only used his special tools to poke and poke, and was careful not to touch the lock. At this time, he signaled Chen Guangyao to take pictures and collect fingerprints.

When Chen Guangyao came forward with tools to collect fingerprints, Fang Zhenyue led Jiayi back. As he watched, he couldn't help but say, "The murderer doesn't have much experience in unlocking doors. Although he can pry the door open, it will definitely make a noise. There are so many scratches. His technique is too poor."

His tone was simply a bit complacent: the murderer is not as skilled as Inspector Fang in prying doors.

Jiayi couldn't help but turn her head and glance at him, wondering whether to laugh or not.

Catching her gaze, Fang Zhenyue felt a little embarrassed. He touched his nose and looked away shyly.

"There are a lot of fingerprints. Go back and compare them with the deceased Miao Liqun's fingerprints to see if there are any left by the murderer here." Chen Guangyao finished collecting and finally stood up and pushed the door.

Now that it was basically confirmed that the murderer entered by prying the door open, the detectives could routinely eliminate the option of acquaintances entering.

As soon as the inner door was pushed open, the three people standing at the door were stunned.

The scene where the body was dumped, the elevators, corridors, and other places where the murderer might have pushed and dragged the victim's body were all relatively clean. Chen Guangyao walked all the way and only found a few drag marks and a small amount of blood stains. The contrast between the indoor scene and the outside was too great.

Chen Guangyao stood at the door and first picked up the camera and took pictures of everything he could see.

Fang Zhenyue and Jiayi stood behind him, looking at the messy bloodstains and dragging and trampling marks on the ground with sullen expressions.

He looked down at the stone floor at the door. There was naturally deposited dust and traces of human life on it. There was no blood stain nor any unnatural cleanliness or mud from washing.

"The murderer probably placed a long, clean and waterproof cloth bag outside the door, put the body on the bag at the door, and then helped it into the elevator." Fang Zhenyue measured at the door.

After he said this, Jiayi and Chen Guangyao looked at some wrinkled dust marks on the ground and understood how they were caused.

"The murderer should have been wearing dark clothes that day. Even if they were stained with blood, they couldn't be seen clearly at night." Jiayi imagined some possible details at the time, and while talking, she recorded Brother Yue and her own speculations in a notebook.

She ran up without seeing the body, just to see the crime scene without the flow image.

In the process, carefully deduce the murderer's behavior and some clues based on the traces at the scene, and then watch the flow image again to make a confirmation, so as to examine whether there are any mistakes in your observation. In the future,

you can also learn and improve in a targeted manner based on your own investigation and reasoning without the guidance of the flow image.

"The murderer should be very strong, otherwise the scene will be more chaotic. It is not easy to move the body of an adult man out of the door. If the strength is not strong, the process will be very chaotic, and the scene may be worse, or even out of control." Jiayi looked left and right at the traces left by the murderer and the victim on the door.

If the victim cannot be moved, the body may tip over when being dragged, and blood may splash everywhere.

Jiayi recalled the murderer she saw in the heart-flow image of the homeless man Liang Xiaofu. He was not very tall, but he did look very strong.

"Or maybe multiple people committed the crime." After listening to the story of the deceased Miao Liqun, Fang Zhenyue guessed that it was an act of revenge by his deceased wife's family. If a family committed the crime, it is possible that they worked together to ensure that the scene did not get out of control. "Sir Chen, were there traces of multiple footprints at the scene?"

Chen Guangyao carefully looked at the bloodstains and bloody footprints on the ground, analyzed it carefully for a while and then said:

"Yes, there were a lot of footprints, and the one with clear shoe prints was Miao Liqun's slippers.

"The other one without shoe prints should be the murderer's... He was wearing shoe covers or something, so the footprints are a bit blurry. However...

"It seems that there is only one size. Look at those clearer marks... Unless the height, weight and footprints of the murderers are similar, even if the footprints are not so clear, there should be some differences in pressure points, shapes, etc."

"It should be one person." Jiayi looked at the scene and suddenly said with some certainty.

"Why do you say that?" Fang Zhenyue turned his head and asked, wanting to hear if Jiayi had any deeper thoughts. Jiayi

looked up at Fang Zhenyue's eyes, and suddenly reached into her pocket and pulled out a stack of half-folded printed papers.

These papers were filled with handwriting that was either stroked or flying. Jiayi spread them out, found one, and handed it to Fang Zhenyue.

"Brother Yue, this is the profile I made before. This page records my analysis of the killer's body shape and strength." Jiayi pointed to a few points on the paper and described them one by one:

"The forensic officer had previously analyzed the killer's strength on the homeless man's wounds - judging from the club wounds and knife wounds, the killer must be a very strong person, otherwise the club wounds would not be so deep. Moreover, it is very tiring to cut open the belly of the corpse and damage the back. As we all know, surgeons are physically demanding, and dissecting and destroying corpses is certainly a physical job.

"Sir Xu judged that the killer was a tall man, but now seeing the footprints left at the scene..."

Jiayi pointed to the shoes of Fang Zhenyue and Chen Guangyao, and said:

"Mr. Fang's shoe size is obviously much larger than the murderer's. At the moment, unless the murderer has a pair of special small feet, he should be at least under 183cm. I guess he may not even be as tall as 180.

"Compared with Brother Da Guangming's shoe size, it is still small. So the murderer should be under 175cm. Am I right, Brother Da Guangming?"

"..." Chen Guangyao looked at the stack of documents in Yi Jiayi's hand, and then at the paper held in Fang Zhenyue's hand. Why did Jiayi suddenly take out a bunch of notes? And she looked well prepared and had expected it?!

“Yes, judging from the size…”

Chen Guangyao tried his best to avoid the bloodstains while wearing shoe covers. He measured the length of the footprints, observed the pressure marks left by the footprints, roughly estimated the weight of the victim, and said:

“If the size of the murderer’s hands and feet are normal, his height should be between 171cm and 174cm, and his weight should not be too heavy.”

Fang Zhenyue withdrew his gaze from Chen Guangyao and looked at the document recorded by Jiayi in his hand. There were countless reasoning arrows on it, supplemented with countless clues and details. One could almost see from the paper how seriously she thought and worked.

When Jiayi nodded to Chen Guangyao, Fang Zhenyue looked at her with bright eyes.

The murderer Jiayi had seen was indeed of normal height, half a finger taller than the homeless man, which happened to be about 172cm. Although he was wearing loose clothes that night, it was still obvious that he was not very muscular, which was consistent with Chen Guangyao's conclusion.

She smiled and nodded to Chen Guangyao, praising him generously: "Brother Da Guangming is so sharp."

After getting the paper back from Brother Yue, she could finally write down the specific height [about 172cm] on the paper.

After taking note, she turned to Fang Zhenyue and said,

"But we infer that he is a very strong man. If it is not a group crime, and he is not a very tall and strong man, then why would a person who is not that tall be so strong?"

Jiayi deduced and guessed,

"Could he be a manual worker? Or at least his arms are often used."

But in her mind flow image, she also saw the string on the murderer's middle finger, which was left by excessive writing. A manual worker who has been writing for many years...

She really couldn't think of what kind of job would have such contradictory and comprehensive characteristics.

"After we see the information and confessions that Sanfu and his team have found, we can discuss it together to see if there are any people in the victim's social network who fit your profile."

Fang Zhenyue said, and pointed to the documents in Yi Jiayi's hand, and asked:

"Are they all your profiles of the murderer?"

Jiayi picked up the set of documents and nodded, "I have done it these days. Although there is no suspect for me to screen and compare, but..."

She smiled and raised her eyebrows.

Fang Zhenyue saw what she meant. She had always felt that the murderer might be a serial killer and might not stop with the next case.

He had this guess at first, but as time went on, he could not find any new clues and no new cases occurred. He gradually became careless and began to think that it might be just like the murder of the homeless man in the past, and it would be left unresolved.

But... this time, Yi Jiayi was still right.

She once again proved that no matter how strong the trust in her was, it was not excessive.

"Anything else?" Fang Zhenyue stretched out his hand to see her profile.

Jiayi handed it to Brother Yue. During these days, she repeatedly watched the flow images, observing and analyzing the murderer.

Although she could not see the murderer's face, he had already become his "old friend". The

one who knows you best is often your opponent.

"The murderer must be a very cautious person. He killed cats and dogs to test the effect of rat poison. Before committing the crime, he was very wary of the police. But after the cats and dogs were killed, the reaction of the uniformed police made him feel safe. Then the crime escalated, and he observed our reaction to the death of the homeless. Neither public opinion nor the police showed a reaction that made him nervous and scared. When a British person was killed in Hong Kong, the police dispatched 800 people to search the mountains and catch the murderer. If we took such a big fight, maybe the murderer would be afraid."

But it was impossible that day, Jiayi said helplessly:

"The murderer has a quick observation and learning ability, and it can be seen that he has a strong logical ability. In a short period of time, he figured out the police's working mode and intensity, but the murderer did not take on a new case until the homeless murders gradually died down and he was sure that the police would not launch a second wave of particularly terrifying investigations.

"This part of the psychological profiling also confused me very much. Would a manual worker have the opportunity to train his brain to be so agile?

"What kind of work or what kind of living environment can make a person have extraordinary physical strength, intelligence and ability to work?"

She has already done a lot of murderer profiling, and next she will have to look for more clues from new cases to add or subtract to her profiling.

"..." Fang Zhenyue was also stumped by her question. He had just accepted Miao Liqun's case, and a lot of information was missing. He couldn't answer her questions yet. It was not until she asked that he began to realize the existence of these problems.

Looking at her with pursed lips, Fang Zhenyue suddenly smiled meaningfully, rubbed the papers with his fingers holding the documents, and couldn't help but sighed, but his eyes became hotter.

Unknowingly, even he, who was called the strongest front-line detective with comprehensive strength by the West Kowloon Serious Crime Unit, was led by her nose.

It turns out that Yi Jiayi has become so powerful that even he can't catch up with her. How amazing! Tsk tsk!

"Perhaps, the person who carried out the murder was one person, but behind him, there was a 'Moriarti' who instigated him to commit the murder and taught him how to commit the murder." Fang Zhenyue held the document and stood there for a long time before guessing.

"..." Jiayi was stunned. She had not thought of this.

Could it be that there is such a terrible behind-the-scenes boss and crime expert in Hong Kong?

Frowning, she recalled the man in the mind flow image. At that time, there were no Bluetooth headsets, so it was definitely impossible to do one command and one action. But it cannot be ruled out that the murderer had received a very perfect plan provided by someone before coming to kill.

But... trying hard to recall the murderer she saw in the previous mind flow image, she shook her nails and her eyes flickered.

Could he just be an excellent executor?

Or is it really as Brother Yue said, that somewhere beyond her mind flow image, a real killer appeared who would never be captured by her supernatural power?