Chapter 153: Sweeping the Scene

Huang Qiangmin didn't go anywhere; he just followed Jiang Yuan, sweeping for trace evidence at the corpse scene, and then climbed upstairs to sweep for trace evidence at the fall scene.

He didn't do any work, nor did he speak; he just followed Jiang Yuan, watching Jiang Yuan work.

Old criminal police like Wu Jun watched Huang Qiangmin's figure, gradually feeling the pressure increasing.

Huang Qiangmin belongs to the criminal police with relatively high ideals.

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

If there were no ideals, the position of criminal police brigade captain would make people very painful.

Both mentally and physically.

Like at this moment, having obtained the mobile phone video, Huang Qiangmin could actually handle the case as a suicide first.

Because this is not just suspected suicide, there is already solid evidence proving it is a suicide case.

If there is evidence later proving it is homicide, just restart the case. In terms of legal principles, both are compliant.

If there is no ideal at all, simply considering worldly gains and losses, closing the case is the most normal decision.

And it is also the most favorable decision.

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

Regardless of which one, the difficulty of solving the case is high.

And if it cannot be solved, then the many cold cases solved this year, and the many jobs done for neighboring counties and cities, will all be in vain.

Fresh homicides cannot be solved, the 300 points are deducted, and then a qualified evaluation is given, which is considered the bureau opening a convenience door.

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

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

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

Homicide is still a very serious matter. Whether to file a case and whether to start it is not something that the criminal police brigade captain can decide alone.

And until now, if Huang Qiangmin doesn't make a decision, the Bureau Chief and the Deputy Bureau Chief in charge of criminal investigation should also appear.

High fall is defaulted to unnatural death. But if the situation is complicated, the Bureau Chief and Deputy Bureau Chief will also come as usual.

By then, Huang Qiangmin must make a decision and report to the Bureau Chief.

Huang Qiangmin naturally knows what the people below mean, but he looked at Jiang Yuan and only said: "You go to the opposite building, run to every office, and if there is a public rest area, get the surveillance video too. The same goes for Wanghe Building; you must run to all the high-level offices."

This still means treating it as a homicide.

The police officers below saw Huang Qiangmin's firm attitude and didn't talk nonsense, turning around to do things one by one.

Anyway, if the sky falls, there is a tall one to hold it up.

Huang Qiangmin took out his mobile phone again, sent several messages, and continued to follow Jiang Yuan's footsteps.

Ultimately, he still believes in Jiang Yuan.

In terms of the number of cases solved, the cold case homicides solved by Jiang Yuan alone are more than those of a squadron of police officers.

If the time node is set closer, the cold case homicides done by the Ningtai County Criminal Police Brigade in the last 10 years must be a little more, but the cold case homicides done in the last five years are not as many as those done by Jiang Yuan.

Jiang Yuan has such strength, others may still hesitate about his age and experience. Huang Qiangmin, however, has seen it all along.

He has experienced the DNA tide of 2003.

What was the result of the Ministry starting to promote DNA at that time?

Many police stations could solve a cold case homicide in a week. Rape cases like this are particularly easy to obtain DNA evidence, and an average of one case a day is not an exaggeration.

How many serial rapists were caught because of this.

The power displayed by technological innovation when it just broke out is enough to make anyone dumbfounded, only believing in the impact of reality.

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

If it is a suicide case encountered this time, then that's it.

If it is really some high-IQ crime, Huang Qiangmin believes that Jiang Yuan's strength can teach him how to be a human.

"Team Huang. The Bureau Chief is here." A police officer came to report.

Huang Qiangmin looked back at Jiang Yuan, seeing that he was still focused on sweeping the scene, and turned to the door.

Arriving at the place, Bureau Chief Director Guan Xi and the Deputy Bureau Chief in charge of criminal investigation had just arrived.

"What's the situation?" Director Guan Xi asked as soon as they met, first wanting to understand the situation at the scene.

"27-year-old male, named Li Jiangshu. High-fall death. According to the information collected so far, he worked in a travel company in Wanghe Building, a private enterprise employee..." Huang Qiangmin said quickly, but also relatively briefly.

Director Guan Xi listened carefully and then asked: "Manner of death?"

"Not quite sure yet." Huang Qiangmin answered and said: "There is a video showing that Li Jiangshu jumped from the window upstairs alone. But we think there are still suspicious points."

"What suspicious points?" Director Guan Xi asked directly.

Huang Qiangmin was silent for two seconds and said: "I am also waiting for the report."

"Hmm..." Director Guan Xi actually had his own sources of information. Seeing Huang Qiangmin not saying anything, he couldn't help but smile and ask: "Jiang Yuan proposed it?"

"Yes."

"You really believe in him."

"I have to believe." Huang Qiangmin instead showed a wry smile.

Director Guan Xi was stunned and laughed out loud.

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

In fact, translating it, it is a very simple scene.

Huang Qiangmin is a Chinese teacher, invigilating a math exam. At this time, the strongest top student in the class suggests that the third question on the math paper is wrong, and none of the four options ABCD are correct.

Although it is a small probability event, can you not report it?

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

"Then handle it as a homicide." Bureau Chief Director Guan Xi's pressure is actually smaller than Huang Qiangmin's.

Huang Qiangmin is responsible for all criminal cases in the county. The solving of fresh homicides is his responsibility, the eight major serious cases are his responsibility, and the solving rate of all cases in the county is also his responsibility.

But for the Bureau Chief, his most important responsibility is actually maintaining stability.

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

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

Excluding whether it is suicide or homicide, this case is just a high fall.

For high-fall cases, even if they are homicides, everyone has done a lot.

The police officers of the criminal police brigade acted quickly.

Those who should be inquired were inquired, those who should be recorded were recorded, and those who couldn't be done in time were also noted with mobile phone numbers, photos taken, and done later.

Three squadrons were scattered, facing four buildings and a circle of podium buildings, and also disappeared without a trace quickly.

Jiang Yuan didn't hear anything outside the window, just focused on collecting physical evidence.

He actually didn't know what he had collected. Modern technology hasn't developed to the point where there are various trace evidence detection instruments on his body.

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

So-called high-IQ crimes actually rarely appear in the domestic criminal investigation environment.

Guys like Tan Yong are already very meticulous criminals.

And for guys like the Bai Yin case, the complexity of the case is at most 60 or 70 points. He is the type with many flaws, but he just can't be caught.

But looking at it from another angle, if a person premeditates a crime, they must be thinking about it and preparing well.

Although most criminals think ridiculously, so they are caught in the rookie stage.

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

Perhaps, rarely catching such people is the real problem.

Jiang Yuan has no criminal investigation experience.

If he were to evaluate his own criminal investigation skills, LV0.5 is already a very high evaluation.

If you count the arrest ability and case-handling level, LV0.3 is not much more. In this regard, he is basically useless.

But Jiang Yuan knows that any criminal, even a truly high-IQ criminal, wants to clean up the scene, which is very difficult.

Especially in this public place. If you spend more time, you leave more information.

The classic Locard's principle says exactly this: the crime process is actually a process of material exchange. As a material entity, the perpetrator always has contact and exchange relationships with various material entities during the process of committing the crime...

Crime will inevitably produce physical evidence. In crime scene investigation, if no traces or physical evidence left by the perpetrator are found, it only means that no traces or physical evidence were found, and it cannot be said that there are no traces or physical evidence at the scene.

Jiang Yuan's crime scene investigation ability is extremely strong, and precisely because of this, he is more willing to use 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, soon lowering his head until his cervical spine was ischemic.

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

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

Wu Jun coughed twice and had to find a stronger police officer from Huang Qiangmin to leave together.

Jiang Yuan wiped until dark, and waited until the people in the building were almost gone before leaving the scene.

When leaving, Jiang Yuan and the accompanying police officer walked into the elevator. Because there was no one in the corridor, the lights went out one by one, only the yellow lights in the fire escape were on, looking quite creepy.

--- Off-topic ---

Wrote until the early hours again, the schedule collapsed, meow. ===== CHAPTER 154 =====