When Fang Zhenyue crossed his legs and the detectives stared at him, Jiayi had already written down several points on the whiteboard. They corresponded to the six items written by Tannen on the far left of the whiteboard:
1. Ordinary appearance, a common face that is not easily noticed by others, no disability or obvious defects, easy to hide in the crowd;
2. Single;
3. Around 40 years old;
4. Enjoy hurting others, but not bad tempered, on the contrary, very good at restraining and hiding himself;
5. Education level below college;
6. Taxi driver;
7. Height is about 5 feet 2.8 inches;
if everyone really believed the profile of Inspector T and went to find the murderer according to that method, and the murderer stopped in time, neither burying the body nor sneaking into Gu Xiaolan's house, they would not be able to catch the murderer by staking out, and they would never be able to catch a murderer with "special physical characteristics".
Jiayi listed the real information of the murderer, but in the eyes of others, her profile had more and more detailed items than Tannen, an expert who studied abroad.
Sanfu crossed his arms and felt relieved when he saw that Agent Yi Jiayi, who had challenged him before, was now challenging the overseas expert on the whiteboard. It was always
more fun to watch others arguing than to argue with others, not to mention that Shiyi was arguing with Inspector T, whom he did not agree with.
Tannen held down the notebook with his hand, watching Yi Jiayi imitate him and write down the details on the whiteboard. He looked at Yi Jiayi like a child learning how an adult speaks.
He smiled tolerantly and asked her,
"Agent Yi Jiayi, what is your basis?"
Although agents may inadvertently use profiling when working on a case,
it's just like someone who has never learned to paint can draw a matchstick figure. That is absolutely different from the "Mona Lisa's Smile" painted by a master painter.
However, he agrees with the atmosphere of open discussion of everything among the agents of Group B. This is very similar to the academic environment he is familiar with. Whether it is a mentor or a student, as long as they have their own opinions and ideas, they can put them forward without worrying about being embarrassed if they say something wrong.
Jiayi turned her head and looked at Tannen without fear, returning the same smile:
"My basis is the latest criminal psychology research literature in the United States, research and analysis of local cases and murderers, and... a large amount of evidence and clues."
Murong Fu's martial arts in Mr. Jin Yong's "Demi-Gods and Semi-Devils" is "returning a person's love in their own way", which is undoubtedly the most suitable method for Inspector T.
Therefore, British criminal psychology still has to compete with American criminal psychology.
When Tannen looked at her in confusion, Jiayi nodded calmly and then began to explain her own profile point by point:
"First of all, in the papers of all profiling masters, a person who is bullied because of his appearance must have extremely low self-esteem and extremely sensitive traits. He will be very neurotic and easily angered.
"In the criminal psychology portraits, all such murderers have revealed their violent tendencies at a very early age. They will attack their classmates, beat up their parents and family members, and cannot get along well with their neighbors.
"A person with this characteristic would not be able to spy on a woman for two years, secretly writing love letters and sneaking into her home without doing more drastic and aggressive behavior.
"Their personality traits are that they are easily influenced by the environment, they are emotional, they express emotions strongly, and they have poor self-control, etc.
"Such a person, if he was deeply in love with Gu Xiaolan and mentally believed that he and Gu Xiaolan were in a romantic relationship, he would have rushed to Gu Xiaolan a long time ago.
"It is impossible for such a person with a special appearance and strange behavior not to be discovered by Gu Xiaolan. If she was discovered by Gu Xiaolan, she would not have kept silent when we were taking a statement from her because she was eager to catch the pervert. "
Last night she read a lot of criminal psychology and psychology books that she had on hand.
In this era, the research on "psychology" has just started, let alone "criminal psychology".
The information she wanted to find was actually very little. Jiayi read books until her eyes were almost blinded, and she finally found some relevant words and sentences.
What she said was based on the well-made and knowledgeable dramas she watched in later generations.
After she finished speaking, she paused for a few seconds, drank a sip of water, and carefully observed Tannen's expression.
She found that he was just frowning and taking notes while thinking about her words, and did not show a sneer. Jiayi finally felt relieved.
So she continued:
"Next, there is another very reliable evidence that can prove that my description of the murderer's personality traits is correct.
"That is the body of the deceased Zhao Dongsheng.
"A person who loved Gu Xiaolan for two years and was obsessed with her to the point that after being provoked by Zhao Dongsheng, he wanted to kill Zhao Dongsheng for his lover. The murderer must have killed with very strong jealousy and hatred.
"But on Zhao Dongsheng's body, apart from the necessary fighting wounds and fatal wounds, there are no other retaliatory wounds.
"If the murderer is as described by Inspector T, he will definitely carry out retaliatory destruction on Zhao Dongsheng's body. This is also consistent with the murderer's profile mentioned in Chapter 9 of the book "Criminal Psychology" about "strong violent tendencies", "bad temper", and "murderers for love".
"But how could such a murderer calmly restrain his desire for violence and only do necessary work such as killing and burying bodies without any other unnecessary behavior?"
Uncle Jiu sat up straight and nodded with relief. Yes, the evil Eleven is back again.
Even those who had studied abroad couldn't defeat Jiayi when it came to understanding the deceased.
Tannen frowned and shook his head, saying,
"Chapter 9 of Criminal Psychology? That's taking it out of context. The rational and extremely restrained murderers mentioned in the chapter you mentioned often drink alcohol before killing someone to increase their courage and reduce their fear. But the murderer drove Zhao Dongsheng away from the villa at No. 6 Sze Hom Road. The car engine showed that the car was driving very smoothly and there were no signs of drunk driving."
Tannen looked at the item about the murderer's occupation written on the whiteboard by Yi Jiayi and retorted,
"If the murderer was a taxi driver, how could he have drunk alcohol?"
As far as he knew, drunk driving was strictly checked in Hong Kong.
Jiayi pursed her lips and smiled, "Whether the murderer was drunk or not, none of us knows. For the time being, we cannot rule out the possibility that the murderer did drink before the murder. Your theory that refutes me is not sound, T sir."
Tannen's cheeks were slightly hot unconsciously. After a moment of silence, he simply signaled Yi Jiayi to continue:
"We have no objection to the second point of being unmarried, what about the third point?"
"No, sir."
Jiayi shook her head, correcting Inspector T's not-so-serious statement.
"The second point is a bit controversial.
"It is possible for a person who is extremely restrained to have a seemingly normal marriage and love relationship.
"The reason why I still think he is unmarried is different from Inspector T's thinking. My argument is that a married person does not have the time to implement long-term and intensive tracking operations on Gu Xiaolan. But a short-term romantic relationship is still possible."
Jiayi stopped talking and pointed to the third point:
"The reason why I think he is 40 years old, older than the age identified by Inspector T, is because of the murderer's love letter."
"Love letter?" Tannen didn't understand.
Jiayi derived the age range of the murderer based on the judgment made by Rick, the forensic officer of the Central Police Station.
But you can't tell everyone that you saw the murderer and then asked the chief forensic officer how old he is.
So in order to find a solid theoretical basis for her words, Jiayi took great pains to search, and finally found clues in the love letter.
Last night, she thought of digging out some clues from the love letter, so she faxed a copy of the love letter to the police handwriting identification expert. The other party faxed it back very efficiently this morning and issued a very detailed report for her:
[1. The paper used by the author for the love letter is Caoxue Xuanxin paper, which is sold in many stationery shops;
2. The author's handwriting is large and the strokes are tight, showing that he has a conceited character. The sharp edges of the strokes show that he is domineering, vengeful, and possessive.
3. When the author wrote Gu Xiaolan's name, the pen strokes became softer, showing that his feelings for the recipient are precious and deep.
4. The author has a serious habit of writing with the pen upside down, and may not have received formal calligraphy learning and training.
Jiayi nodded to Tannen, then smiled and pointed to Uncle Jiu.
"I found that the stroke sequence, writing style, and paper used in the love letter are different from those commonly used by young people today.
"I took this love letter to find a handwriting identification expert, and he gave me some information.
"With this information, I discussed it with Uncle Jiu again. Uncle Jiu reminded me that the author's serious habit of writing with a pen upside down might not be because he had not received formal calligraphy training, but might also be because he was influenced by some incorrect cursive writing habits of the older generation.
"Moreover, Uncle Jiu also pointed out that the Caoxue Xuan letter paper used by the murderer was more popular in Uncle Jiu's era, but when Uncle Jiu was in school, people mostly used brushes to write letters on Xuan paper.
"But the murderer used a fountain pen, so it is judged that his age must be much younger than Uncle Jiu.
" Combining all the clues, the murderer's age was determined to be around 40 years old. "
After saying this, Jiayi let out a long sigh. During her tight mission at the Jinshan corpse dumping site, she squeezed out time to study these theoretical knowledge, which squeezed out her own sleeping time.
It was not easy.
But fortunately, she finally managed to make the logic come together, and she can safely show this information to everyone.
"..." Tannen couldn't help but slightly open his lips and stare when listening to Jiayi saying this.
He stared at Jiayi's face, his brain working rapidly, constantly analyzing her logic and thinking about her behavior.
Jiayi blinked at him, wanting to get some feedback from him.
Tannen looked at her for a while, not only did he not respond, but he suddenly lowered his head and started to write down on the notebook.
Everyone waited for him for a long time before he finished writing.
When he raised his head again, he frowned slightly and turned to look at Agent Lin Wangjiu.
Uncle Jiu had been waiting for this moment for a long time. Facing Tannen's inquiring gaze, he nodded proudly. That calm and fearless reserved smile actually had a bit of master style.
Yes, it was him, Lin Wangjiu!