In Beijing in spring, the sky often appears to be a clear light gray, and the haze covers the sky like a dry dark yarn.

Ji Bai sat leisurely on the white lounge chair in his home yard, with a pot of tea in his hand, and in front of him was a quiet pool. The peach trees beside the water were full of flowers. Scattered petals fell on the grass, and the faint fragrance came from it.

He sipped the tea and closed his eyes. There was only Xu Xu's voice in his ears. The sound was as quiet as water, which made the night before him look even quieter.

On the other hand, Xu Xu was inspired by Ji Bai's words "I'll give you two minutes", which aroused some competitive spirit. He answered lightly "Okay", and secretly brewed, entering a state of concentration of fighting.

"First of all, according to statistics, in the past ten years, 989 criminals who endanger public safety in my country have been male and 966 high school or below, so it can basically be determined that criminals are male and have a low level of education."

"Yeah." Ji Bai turned his head and lit a cigarette, "Continue."

“Secondly, the criminal’s goal is clear.

If he wanted to retaliate against ordinary people, there were three parks with larger area and higher traffic. In these parks, it would be more difficult for us to investigate. However, the criminals did not choose these parks, but took greater risks and chose several parks closer to CBD to commit crimes.

These parks were planned by the government and donated by some financial groups of CBD. There are also some ordinary citizens, but most tourists are residents near the CBD, either rich or noble. In the hearts of citizens, these parks are symbols of CBD.

This can reflect two points: First, the criminal is familiar with this area and is likely to work and live in this area; second, he is within a specific range, hurting random objects, and the feelings he wants to vent is also obvious, revenge on high-income people in this city, and even revenge on CBD."

Ji Bai smiled silently, but his tone was faint: "Then why aren't he unemployed vagrants? The white-collar worker in the company who was fired? Must be a security guard?"

Xu Xu replied: "One of the unemployed vagrants, there may be some who hate the entire society, but they will not only hate CBD, and they do not have the opportunity to understand in depth. You will not hate things that you hardly understand or even out of reach. Moreover, there are very few unemployed vagrants in CBD;

A white-collar worker in a company who was fired is more likely to retaliate against the company or someone he works for, but he will not hate this class because he is originally this class, how can he hate himself?

What is most in line with the criminals’ description are those who are out of reach for the prosperity and wealth of CBD, that is, low-income workers working in CBD.

It must be that a major setback in work in recent days has enhanced his sense of frustration and hatred of CBD wealth, so he began to commit crimes.

Moreover, for a young boy who is unwilling to accept it, security guards are relatively decent in all low-income jobs.

In addition, the criminal's time for committing crimes is very scattered, which means that his working hours are also irregular. The working hours of the CBD security guard are working three shifts."

Ji Bai asked: "So you infer that he didn't go to work on Saturday morning, which is based on the time of the crime?"

Xu Xu replied: "Yes. There was an injury case on Saturday afternoon. Because there was a large flow of people on weekends, the blade could not have been buried on Friday, but could only be buried on Saturday morning or at noon."

Ji Bai did not say she was right or wrong. Instead, he frowned and read another line of words on the report: "I have a more irritable personality. I should have committed illegal and irregular behaviors when I was young, at least I was seriously punished by the school. I had experienced major changes when I was young, such as family deterioration and parents divorced; I had no, or only had superficial relationships... What are these messy things?"

"It is the basic characteristic of a criminal with an antisocial personality." She looked up at several photos of blades on the white version and said slowly: "As for the criminals, there is no relationship... because I have a feeling, although he has good observation and judgment, and is a little clever, his mentality is not mature... Cutting a paper knife to form a five-pointed star, pouring it on river water, and even pouring it on spicy hot soup, it is more like the revenge of a depressed and unsuccessful boy. He is not smart and more impulsive."

Both of them were silent for a while, and Ji Bai spoke first: "Have you finished speaking?"

"I'm done." Xu Xu glanced at his watch and added, "1 minute and 58 seconds."

Although her tone was calm and a little arrogant, her breathing was significantly worsened.

Nervous? Ji Bai closed his eyes and took a sip of cigarette.

These days, the two of them have been calling each other over several phone calls. Xu Xu gave him the impression that he is an excellent female nerd, an apprentice and subordinate worthy of decorating. That's all.

But at this moment, with the clear breathing sound in her ears, her image suddenly became vivid: her short hair, a small face, pale skin, and a serious expression. She was undoubtedly smart, arrogant and stubborn, but there was also the tenderness of young girls that had not faded.

Yes, for the criminal police profession who often faces the decadent human nature and blood, this girl is too talented, but also too immature.

So Ji Bai began to formally attack her without hesitation: "Xu Xu, are you used to being so imaginative and guessing to handle cases based on your so-called "feeling"?"

Xu Xu frowned immediately and replied hard: "If you understand behavioral analysis as 'guess', then I have nothing to say."

Ji Bai sneered: "You are not convinced?"

"Sorry, I'm not convinced."

"Then why didn't the suspect be caught?" Ji Bai asked coldly.

Xu Xu couldn't answer.

Neither of them spoke, only the other party breathed faintly on the phone. After a while, Xu Xu asked lightly: "Is there anything else? I'm not hung up."

Ji Bai: "What are you anxious about?"

A very rare feeling of anxiety suddenly arose in Xu Xu's heart.

But I heard him say, "Why can't I find the suspect? It's very simple. Assuming that your conclusion is correct, it is natural that something went wrong in the investigation process and some unpredictable deviation occurred, allowing the criminal to escape our search."

Xu Xu was stunned and continued, "Listen: Let Zhao Han take you to check again tomorrow. You can go see it yourself, check it, and meet everyone. You must do it yourself, instead of hiding in the office to analyze it.

The criminal must be among the people you have met. Since you know him so well, even if there is no evidence, when he stands in front of you, you have to recognize him.

I will go back to Lin City tomorrow afternoon. The morning after tomorrow, I will hear your new report."

Xu Xu was stunned for a rare moment.

It was not until now that she confirmed that Ji Bai actually supported her.

His words "Even if there is no evidence, you can recognize him when he stands in front of you." This surprised her.

Because of similar words, Xu Xu's mentor, Cui Yihua, a nationally renowned professor of criminal psychology, also said to her privately: "A truly excellent criminal psychological portrait can see through the suspect even if he has not found direct evidence." But the professor will never say such words publicly because they will appear too absolute, too subjective, and almost ideal. Even the professor cannot guarantee that he can do it.

As a policeman who graduated from non-criminal psychology, Ji Bai was able to say the same thing after listening to her report, which only shows that his insight and understanding are amazing. He really understands what she is doing.

For someone like Xu Xu who likes to analyze and think, the ideological resonance is more intense than substantial rewards. So although Ji Bai was aggressive before, she has always been nervous and would not care too much. On the contrary, his profound understanding of criminal psychology and his extremely bold trust made her faintly excited and moved.

"Thank you." She paused, "I..."

Ji Bai could hear the moving feeling in her voice, thinking that she wanted to say something to thank him for his appreciation, but she silent for a moment, and then repeated two words solemnly and monotonically: "Thank you."

He is really not good at speaking... Ji Bai laughed silently: "Okay. I'm dead, go to bed early."

The next morning, Xu Xu arrived at the police station and asked Zhao Han to prepare for construction. At this time, the two received a text message from Ji Bai, asking them to start the investigation from the staff of the CBD Park, because the nature of the work of the park was similar to that of the security guards, and they also worked in three shifts.

Xu Xu disagrees with this instruction: the working environment between park security guards and CBD office security guards are very different. They will not be frequently stimulated by the gap between the rich and the poor in front of them.

Zhao Han also said that he had investigated the security guards in the park where the crime was happening at the beginning and no suspect was found.

But Ji Bai insisted. He only said one thing: "The criminal committed a crime four times, and he was not photographed by a probe once."

The implication is that criminals should be very familiar with the park's security system. The four parks are all planned and built in a unified manner.

Therefore, Xu Xu's behavioral analysis conflicted with Ji Bai's logical reasoning. The result naturally needs to be followed by Captain Ji's opinion first.

Although Xu Xu disagreed with Ji Bai's idea, he was meticulous in executing the order. By the evening of that day, Xu Xu and Zhao Han had already met all the security guards in the three crime parks, but still no suspect was found.

Finally, they arrived at the "Ruiying Park", where the first incident occurred. This place is the farthest from CBD, so it was also the last investigation.

At sunset, Xu Xu and Zhao Han sat in the security captain's office. The office was in a row of bungalows, with more than 40 surveillance TVs installed on a wall.

The security captain is named Ding, a medium-sized person, over 40 years old, with a kind face and a very mature and sophisticated conversation. He cooperated very well and brought all the employee resumes.

The result is still not.

There are 30 security guards in the park, and there are 18 people who are not on duty last Saturday morning, and 8 of them meet the age and education requirements. However, none of these people have been severely punished recently.

Xu Xu asked to meet everyone, but Captain Ding was in trouble: "There are only those on duty now, and others may go where to play. Can you see if you can see tomorrow morning? I will notify everyone to come."

Xu Xu and Zhao Han walked out of the captain's office. It was already dark by this time, and the stars were like broken jade, quietly embellishing the night sky. The two of them sat on the bench in the park, quite tired.

"Let's start checking the CBD security guard tomorrow." Zhao Han said, "Team Ji is here to come to work tomorrow."

Xu Xu didn't say anything. She kept thinking about Ji Bai's words last night in her mind.

He said: Some unpredictable deviation occurred, allowing the criminals to escape our search.

If the criminal really conceals the real information in some way, wouldn’t the screening conditions she originally set be unreliable?

Ji Bai also said: Even if there is no evidence, when he stands in front of you, you have to recognize him.

There is no evidence, no standards. There is only the appearance of that person...

Xu Xu stood up and rushed to the captain's office. Zhao Han followed behind: "Xu Xu, what are you doing?"

Xu Xu did not answer, but pushed open the door and walked to the captain. Captain Ding was very surprised to see them coming back: "Is there anything else, police officer?"

Xu Xu nodded, pondered for a moment, and said, "The person we are looking for is not tall, thin, and has a medium-to-high appearance.

He pays great attention to his clothes and looks and spends a lot of money to buy clothes. But his dressing always makes people feel inexplicably uncomfortable;

He likes to show off, but what he says always makes people feel unrealistic;

He is not very sociable and no colleague is close to him;

He has a bad temper and will suddenly get angry and cannot accept criticism. He cannot understand others' words well. He always feels like "he can't listen" when speaking to him;

He would show off to his colleagues that his family environment was once very good…”

Captain Ding was stunned at first, but when he heard it, his face gradually changed.

Xu Xu looked at his expression, and his heart was filled with joy, but his face became even more solemn: "Who is it?"

Although Zhao Han didn't quite understand, he realized his reaction when he saw the expressions of the two people and picked up the resume on the table to read them.

"Yang Yu?" The captain was very surprised, "Do you know Yang Yu?"

Zhao Han immediately flipped into his resume and frowned: "But his resume said that he was awarded last month for his outstanding work performance and received a bonus of 500 yuan. And he was on duty last Saturday morning."

Xu Xu took Yang Yu's resume, glanced at him, and looked up: "What did he receive the reward for?"

Captain Ding also became nervous: "Commendation... is the blade case you investigated. A tourist was scratched by a blade on the bench. He was the first to discover that he helped treat... In fact, his usual work performance was very average, but because of this, the principal praised him..."

Xu Xu and Zhao Han's faces changed, and Xu Xu interrupted him: "Has he changed shifts with someone last Saturday?"

Captain Ding: "Wait...I'll ask." After saying that, he called a phone number, asked a few words, and hesitated: "He has changed shifts with people, and has changed to evening shifts."

"Xu Xu." Zhao Han couldn't help but feel excited and pointed to the line on his resume, "He worked as a security guard in an investment bank in CBD four months ago."
To be continued...