Chapter 152: Sweeping the Scene

Huang Qiangmin didn't go anywhere, just followed Jiang Yuan, sweeping up the trace evidence at the scene of the body, and then climbed up the stairs to sweep up the trace evidence at the scene of the fall.

He didn't work or talk, just followed Jiang Yuan and watched Jiang Yuan do things.

Old criminal police such as Wu Jun looked at Huang Qiangmin's figure and gradually felt the pressure doubled.

Huang Qiangmin is a criminal police with more ideals.

Although the word "ideal" is too hypocritical to describe a middle-aged man in his forties or fifties, this word is occasionally used in the police force.

If there is no ideal, the position of criminal police captain will make people very painful.

Both mentally and physically.

Like at this moment, after getting the mobile phone video, Huang Qiangmin can actually handle the case as suicide first.

Because this is not just a suspicion of suicide, there is already solid evidence to prove that it is a suicide case.

If there is evidence to prove that it is homicide in the future, it is nothing more than reopening the case. In terms of legal theory, both are compliant.

If there is no ideal at all, and simply considers the gains and losses of the world, closing the case is the most normal decision.

Moreover, it is also the most favorable decision.

Because this case, if it is not a suicide, is either a high IQ crime, or a case where the murderer is extremely lucky and the victim is extremely unlucky.

No matter which one it is, the difficulty of solving it is very high.

And if it cannot be solved, then all the backlog cases solved this year and all the work done for Lin County and Lin City will be in vain.

If the current murder case cannot be solved, 300 points will be deducted, and then a qualified evaluation will be given, which is considered to be a big convenience for the bureau.

However, Huang Qiangmin's ideal country does not allow him to do this.

Therefore, in the eyes of several experienced criminal police, Huang Qiangmin is almost reckless in waiting for Jiang Yuan to collect evidence.

"Captain Huang. Otherwise, let's go back and discuss it first?" A policeman came forward to suggest.

The murder case is still a very serious matter. Whether to file a case or not, whether to start it, is not something that the criminal police captain can decide alone.

And now, if Huang Qiangmin doesn't make a decision, the director and the deputy director in charge of criminal investigation should also show up.

Falling from a height is considered an abnormal death by default. But if the situation is complicated, the director and the deputy director will come as usual.

At that time, Huang Qiangmin will have to make a decision and report to the director.

Huang Qiangmin naturally knew what the following meant, but he looked at Jiang Yuan and said, "You go to the opposite building and run to all the offices, including those with public rest areas, and get the surveillance videos. The same is true for Wanghe Building. You must run to all the high-rise offices."

This still means that it must be treated as a murder case.

The police below saw Huang Qiangmin's firm attitude and stopped talking. They turned around and went to work one by one.

Anyway, there is someone taller to hold up the sky if it falls.

Huang Qiangmin took out his mobile phone again and sent several messages in a row, while continuing to follow Jiang Yuan's steps.

In the final analysis, he still believed in Jiang Yuan.

In terms of the number of cases solved, Jiang Yuan solved more unsolved homicide cases than a squadron of police officers.

If the time node is closer, the Ningtai County Criminal Police Brigade must have solved more unsolved homicide cases in the past 10 years, but the unsolved homicide cases in the past five years are not as many as Jiang Yuan.

Jiang Yuan has such strength, and other people may still hesitate because of his age and experience. Huang Qiangmin saw the whole process.

He experienced the DNA boom in 2003.

At that time, the ministries and commissions had just started to promote DNA. What was the result?

Many police stations could solve a homicide case in a week. DNA evidence such as rape cases is particularly easy to obtain, and it is not an exaggeration to say that an average of one case a day is solved.

How many serial rapists have been caught because of this.

When technological innovation just broke out, the power it showed was enough to make anyone dumbfounded, and they could only believe in the impact of reality.

In Huang Qiangmin's view, Jiang Yuan's technical strength, at least in Ningtai County, is explosive.

If this is a suicide case, then it's fine.

If it's really a high-IQ crime, Huang Qiangmin believes that Jiang Yuan's ability can teach him a lesson.

"Captain Huang. The chief is here." A policeman came to report.

Huang Qiangmin looked back at Jiang Yuan, and seeing that he was still scanning the scene without distraction, he turned and went to the door.

When he arrived at the place, the chief Guan Xi and the deputy chief in charge of criminal investigation had just arrived.

"What's the situation?" Guan Xi asked as soon as he met, and he had to understand the situation at the scene first.

"27-year-old male, named Li Jiangshu. Died from a high fall. According to the information collected so far, he worked in a travel company in Wanghe Building, an employee of a private company..." Huang Qiangmin spoke quickly, but also briefly.

Guan Xi listened carefully, and then asked: "What about the way of death?"

"Not sure yet." Huang Qiangmin replied, and then said: "There is a video showing that Li Jiangshu jumped from the upstairs window alone. But we think there are still doubts."

"What doubts?" Guan Xi asked directly.

Huang Qiangmin was silent for two seconds, and said, "I'm waiting for the report too."

"Well..." Guan Xi actually had his own source of information. Seeing that Huang Qiangmin didn't say anything, he smiled and asked, "Did Jiang Yuan bring it up?"

"Yes."

"You believe him quite a bit."

"I have to believe it." Huang Qiangmin smiled bitterly instead.

Guan Xi was stunned and laughed too.

He himself was a leader, and suddenly he understood Huang Qiangmin's mentality.

Actually, if you translate it, it's a very simple scene.

Huang Qiangmin is a Chinese teacher, invigilating a math test. At this time, the strongest student in the class said that there was an error in the third question on the math test paper, and none of the four options ABCD were correct.

Although it is also a very low probability event, can you not report it?

If you can't understand it yourself, don't you have to wait for the student, or for more information from above?

"Then treat it as a murder case." Director Guan Xi's pressure is actually less than Huang Qiangmin's.

Huang Qiangmin is responsible for criminal cases in the entire county. It is his responsibility to solve the current murder case, the eight major types of serious cases, and the cracking rate of cases in the entire county.

But for the director, his most important responsibility is actually to maintain stability.

Since Huang Qiangmin decided to support Jiang Yuan, Guan Xi also accepted it and helped him to further sort out the relationship.

Huang Qiangmin was indeed grateful, and said, "Then let's expand the investigation first. If we can confirm that it is a murder case, we will file a case..."

Apart from the judgment of suicide or homicide, this case is just a high fall.

As for high fall cases, even if it is a murder case, everyone has done a lot.

The police officers of the Criminal Police Brigade acted quickly.

Those who should be questioned asked questions, those who should take notes took notes, and those who didn't have time to do it also wrote down the mobile phone number and took photos, and did it later.

The three squadrons spread out, facing four buildings and a circle of podium buildings, and quickly disappeared without a trace.

Jiang Yuan turned a deaf ear to what was happening outside the window and focused on collecting physical evidence.

In fact, he didn't know what he had collected, and modern technology had not developed to the point where he had various trace evidence detection instruments on hand.

However, like Huang Qiangmin, he also realized that what he was facing might be a windmill, or it was really a strong enemy with complete armor.

The so-called high-IQ crime is actually rare in the domestic criminal investigation environment.

Guys like Tan Yong are already very meticulous criminals.

And the case of the guy in the Baiyin case is only about 60 or 70 points complicated at most. He is the type with many loopholes, but he can't be caught.

But from another perspective, if a person premeditates a crime, he must think about it and be well prepared.

Although most criminals think ridiculously, they are arrested at the rookie stage.

But is there anyone who escaped in the first or second premeditated crime, thus gaining experience and continuing to commit crimes?

Perhaps, the real problem is that such people are rarely caught.

Jiang Yuan has no criminal investigation experience.

If you want to evaluate his own criminal investigation skills, 5 is already a very high evaluation.

If you take into account the ability to capture and the level of case handling, 3 can't be more. In this regard, he is basically useless.

But Jiang Yuan knows that it is very difficult for any criminal, even a really high-IQ criminal, to clean up the scene.

Especially in such public places. The more time you spend, the more information you leave behind.

The classic Locard principle talks about this: the crime process is actually a process of material exchange. As a material entity, the perpetrator always contacts and exchanges with various material entities in the process of committing crimes...

Crime will inevitably produce physical evidence. If no trace evidence left by the perpetrator is found during the crime scene investigation, it can only mean that no trace evidence is found, but it cannot be said that there is no trace evidence at the scene.

Jiang Yuan's crime scene investigation ability is very strong, and because of this, he is more willing to use a comprehensive inspection to prove the nature of the case.

Rather than making a conclusion on this.

Wu Jun finished his work and followed Jiang Yuan. He soon bowed his head and his cervical spine was ischemic.

Seeing Jiang Yuan wiping the scene of the fall, Wu Jun said: "Why don't I send the body to the funeral home first."

"Okay, I'll go later." Jiang Yuan only responded and buried his head in wiping.

Wu Jun coughed twice and had to ask Huang Qiangmin for a stronger policeman to leave with him.

Jiang Yuan wiped the floor like this until dark, and only left the scene when most people in the building had left.

When leaving, Jiang Yuan and the accompanying police officer walked into the elevator. Because there was no one in the corridor, the lights were turned off one by one. Only the yellow light in the fire escape was on, which was quite creepy.

－－－－－－－Off topic－－－－－－

I'm writing until the early morning again. My work and rest schedule has collapsed. Meow