These words should not be said. Director Deng felt a little regretful when he said it. He immediately reminded him in a very serious tone: "Don't think about it elsewhere. Comrade Yue Guozhi is also a criminal policeman. He has handled no fewer major cases than you, Cheng Crazy. It's just that the case is different from the case. He is not very good at investigating murder cases like 3.29. Moreover, he has not only been able to solve the case, but also served as deputy director and acting director of the Nangang Public Security Bureau. He has worked in management positions for so many years and has leadership skills."

"Director Deng, I understand, I won't think about it elsewhere."

"Actually, I wanted to talk to you about it. You are a first-class hero and model, and you must take the lead. I know what kind of person you, Crazy Cheng, are, you will not form cliques or intrigues, but your every word and action, every move can affect many people. It can be said that many police officers of the detachment follow you and Comrade Zhou Suying. If you take the lead and take the lead in respecting the leaders, Comrade Yue Guozhi will be able to gain a foothold as soon as possible and establish prestige."

Han Bo also got up very early. Although he only slept for more than four hours, he had nothing to do in the past few days and was not sleepy at all.

After getting up, I was not idle. My wife urged her three children to have breakfast together. After dinner, I took them to school. On the way back, I went to the vegetable market. After buying vegetables, I chatted with several old men.

We talked until 10:30, and received the call, and met our old comrade-in-arms apprentice Zhong Xiaoming.

"Mr. Han is early, sister-in-law is early. These fruits are not my business, but Director Wang is leading them." This is the first time Zhong Xiaoming has seen the legendary Bureau Han, but not the first time he has seen Li Xiaolei. Although he is very excited, he is not particularly nervous.

The young man is very capable, no wonder Cheng Wenming trained him carefully.

He said he was sent to the grassroots level, but he was stuffed to Wang Jiefang.

Han Bo took the initiative to reach out and snatch it. He was about to get in the car with him. Li Xiaolei, who had just handed the fruit to Han’s mother, suddenly said: “Han Bo, Xiao Zhong, I’ll go with you.”

"Go together?" Han Bo was ridiculous.

Li Xiaolei subconsciously looked down at the sneakers he had put on when she came back, and said excitedly: "Anyway, I'm fine, I'm idle, so I'm idle, so why not go out with you."

If you were in Shenzheng, it would obviously not be a good effect to take her to handle the case.

But this is Nangang, not Shenzheng, but just helping his old comrades, and it is not even worthy of helping.

She had a rare interest in solving the case. Han Bo didn't want to disappoint her, so he opened the car door: "Okay, get in the car."

"Xiao Zhong, is it okay?"

"Sister-in-law, why do you ask this question? We can't even invite a distinguished guest like you."

"Okay, let's go!"

Li Xiaolei was so excited that she was raped and murderer who was able to catch even the little girl with her husband.

Han Bo's heart was not completely on the case. The car had just driven less than two kilometers away. He suddenly asked: "Xiao Zhong, when was Yue Zhi transferred to Nangang? What position had he held before he was transferred to the captain of the Criminal Police Detachment?"

Why would the leader ask this question?

Zhong Xiaoming was stunned for a moment and hurriedly said, "Yuezhi is from Dongzhou. He was transferred here four years ago. At that time, Nangang had been engaged in old city renovation and built construction everywhere. Several gangs bullied the market and monopolized the supply of building materials and earthwork projects. Secretary Wang of the Municipal Party Committee felt that the Nangang Municipal Bureau was not cracking down effectively, so he found a way to transfer Yuezhi from Dongzhou."

Nangang is a county-level city between Nanzhou District and Sigang County. The secretary of the municipal party committee is generally a member of the Standing Committee of the Nangang Municipal Party Committee or the deputy mayor of Nangang Municipality. The secretary of the municipal party committee is not satisfied with the public security situation under his rule, so it is normal to adjust the director of the public security bureau.

Han Bo pondered: "So Secretary Wang was also transferred from Dongzhou?"

"Yes, Secretary Wang is from Hai Harbor, but he has been working in Dongzhou."

Zhong Xiaoming paused and then said, "I heard from the master that Yue Zhi was a technical engineer at the beginning. Now he is a senior engineer with the qualification of secondary technical appraisal. He is also a provincial criminal investigation expert. He has published many articles. I am not very clear about my previous resume. I only know that after being transferred, I will serve as the deputy director and acting director of the Nangang Municipal Public Security Bureau. Maybe Secretary Wang was transferred later and failed to be promoted."

It turns out that the foundation is unstable, no wonder even Li Jiaqi was not convinced when she mentioned this detachment captain.

Criminal investigation is not about other tasks. If you don’t have the support of your leader and cannot solve several major cases, it will be difficult to establish prestige. If you meet a few senior subordinates, it will be even more difficult to open up the situation.

One of the two deputy detachments is a first-class hero and model in the national public security system, and the other enjoyed the treatment of deputy division-level eight years ago. They must have education, qualifications, qualifications, and ability. As a well-established "***", Zhou Suying has connections that others do not have. The commander of the military sub-district in the Standing Committee of the Municipal Party Committee cannot treat her differently.

Han Bo really sympathized with the new captain of the old unit, and at the same time he felt that it would be bad if this continued.

I was wondering if I would like to remind Bureau Deng that cadres cannot be appointed like this. If they should be adjusted, they should be moved. If they should be moved, they should be moved. I cannot just work in the Nangang Municipal Bureau. Chang Yuanjian served as deputy director of the Nangang Municipal Bureau for many years, so he was confused about creating a "Liangzhuang Gang". Zhong Xiaoming said again: "Yuezhi hired another criminal investigation expert, a criminal psychology expert, and my master went to the airport to pick him up, so he couldn't come today."

“Where did you ask?”

"I don't know, but people came from Beijing." Zhong Xiaoming felt that he was dying and went to the doctor for trouble, and said with some disdain: "What are the psychological close-ups and psychological portrayals? When this is filming a TV series, I still read the mental detective. Anyway, I think it's not reliable."

It is normal for a young man to think so, and it can be said to be a common phenomenon.

But in many cases, whether it is the traditional criminal investigation model or the current modern investigation model that relies more and more on technology, it often exposes a disadvantage, that is, there is no way to start with the scope of criminal suspects, or simply determine the space or physical scope of the criminal person through the positioning of surveillance and various technical investigation methods.

Once there is no surveillance and the use of technical investigation methods is difficult, just like the March 29th case, the investigators can only use traditional investigation methods like headless flies, checking one by one, and trying their luck one by one. Fortunately, they can master the suspect's DNA information and allow investigators to bet to see if they can compare with someone's DNA. It would be fine if they succeed. If the investigation is completed, the murder case may really become a accumulated case.

As long as the case can be solved, is it important to use what means? As long as it is legal!

Han Bo looked back at Li Xiaolei who wanted to speak but stopped and said lightly: "The analysis and reconstruction of criminal behavior and psychology is not a science at present. In China, it is still at the embarrassing level of excessive deification among the people and excessive disdain for the investigation department. Many investigators at the grassroots criminal investigation department often asked, can you portray the suspect clearly? Can you clearly describe the image and location of the suspect and who is the murderer? Those who ask these questions are obviously because they have watched too many movies and TV series. Those who can do the above are charlatans, not policemen engaged in criminal psychology analysis."

"Then what can they do?" Li Xiaolei asked curiously.

"It may be simple, or even very important, but it is not an easy task. It requires professional training and rich experience. For example, when restoring the crime scene with technicians, technicians are responsible for restoring the externalized actions of the suspect, and what they are responsible for is inner dynamics, which includes mental state and mental state. To put it simply, it is to figure out why the suspect is committing a crime; secondly, it can help the investigators determine the scope and determine the direction of the investigation."

Han Bo paused and added: "Xiao Zhong, your master thinks that the murderer knows the murderer and the murdered girl. This is an acquaintance who commits the crime. In fact, it is also a psychological portrayal. But he doesn't know that, you don't think so."

"Mr. Han, my master's experience."

"This is called knowing the truth but not the reason. You cannot learn from him, at least you cannot learn from him completely. You must accumulate experience through case handling and learn more theoretical knowledge."

"yes!"

As we were chatting, the phone rang.

Han Bo pressed the call button and raised his phone and asked, "Su Ying, is there any news from Fang Hailong?"

"Director Han, your method is so good. Fang Hailong and his team successfully detected sperm on half of the leaf after a night of screening experiments! Now it is basically confirmed that Lao Cheng's inference is valid. The small park is the first scene, and the murderer raped the little girl in the small park and killed him."

It is not that easy to kidnap the victim's girl to a small park in broad daylight. The children are so smart nowadays, let alone the victim's girl was born in such a family.

There is a high possibility that an acquaintance commits a crime, and there are very likely omissions in previous investigations.

Before Han Bo could speak, Zhou Suying said excitedly again: "They used the sperm detection method. Although the sperm spots are already trace and the number of sperm is not very satisfactory, after repeated experiments, they chose a high concentration of infusion solution and appropriate dyeing solution to improve the sperm detection rate. The staining method is used. Generally, just by finding a complete typical sperm, they can confirm the sperm spots, but they were lucky enough to find four!

If they are not careful, they will have problems in the impregnation and treatment of old sperm spots, resulting in the sperm tail falling off and can only detect the sperm head. Then they need to identify trichomonas, yeast, etc., which will not be so fast and will definitely delay a long time."

He is worthy of being the deputy captain in charge of criminal science and technology, and he is very familiar with the experimental methods.

The old comrade-in-arms became more and more professional. Han Bo was very pleased and couldn't help but smile and asked, "Is there any comparison?"

"I've compared it. Fang Hailong just compared it until five minutes ago, and was sleeping soundly on the table."

After working for dozens of hours in a row, you can imagine how tired or sleepy Fang Hailong is.

But this is not a trivial matter. Han Bo pondered: "Suying, genetic markers are the key. The genetic markers in individuals should be the same as those in their own blood or saliva, so as to allow the comparison of the samples in different tissues and organs, but you only have the residual marks taken from the victim's vagina."

"Director Han, Hailong was taught step by step back then. It was very rigorous and would not easily issue an appraisal report without 100% sure. He carefully compared the two test materials and confirmed that it was left by the same person. It was also of type O blood, and the DNA test results were consistent."
Chapter completed!