Chapter 529 The Disappearing Murderer (Big Update Please Vote!)

At the scene, Chen Yan had not yet completely completed the investigation.

Because there has been no movement of personnel for a long time, the cement factory's internal facilities have aged, and the yard has long been overgrown with weeds. Even on the cement road, there are many weeds emerging from the cracks in the cracks.

The place where the taxi stopped was a gravel clearing surrounded by a circle of weeds.

Chen Yan was carefully observing whether there were any traces on the surrounding weeds.

In addition to the tire marks run over by the wheels, there are also many footprints left by detectives after entering the scene.

The weeds were lying down, and although no obvious footprints were left, it was still possible to tell where someone had walked.

Detectives follow strict procedures and regulations when investigating a scene.

The layout of the cordon and the entry of personnel have a certain range and specific channels.

The crime scene here was found by detectives from the Shen City Detective Team by calling the taxi positioning system.

Therefore, when the detectives arrived at the crime scene, there was no damage around them.

The on-site preservation can be said to be quite complete.

Wang Fenglei certainly noticed the details that Chen Yan paid attention to.

Since the serial murder of a taxi driver 10 years ago, Wang Fenglei will arrive at the scene immediately every time a taxi driver is murdered in these years.

With Wang Fenglei's experience in handling cases, it was impossible not to notice these details.

"We conducted a detailed survey of the surrounding weeds before entering the crime scene."

"But unfortunately, no trace of the murderer leaving here was found."

How the murderer left the scene is naturally the focus of attention in solving the case.

This place is far away from crowded areas and there are no buses around. The murderer will most likely leave on foot.

And the taxi was surrounded by weeds. When the murderer left, he would definitely clear the grass, which might leave some details.

But since Wang Fenglei said that no clues were found, Chen Yan would naturally not doubt that the investigators of the Shen City Detective Team were incompetent.

There are no traces, which means that the murderer must have used some special means to escape.

However, Chen Yan hasn't discovered it yet.

Although Chen Yan believed that Wang Fenglei's men would not make such a stupid mistake, out of caution, Chen Yan still walked around the scene.

There are some things that you won’t feel at ease if you don’t take a look at them yourself.

What's more, the statement that unlocks the visual gene lock is much more insightful than the average investigation detective.

In the entire grass, there is a passage that has been opened for the detectives to enter and exit. When Chen Yan came in, he came in through this passage.

Following Chen Yan to the opened passage, Wang Fenglei pointed in front: "Before opening this passage, we conducted a careful survey of the vicinity and can confirm that there are no traces of man-made destruction."

Chen Yan nodded, of course he believed this.

Because Chen Yan had already circled the grass at the scene for almost a circle, but he also found no trace of any pedestrians passing by.

In other words, there is no problem with the judgment of Wang Fenglei's subordinates.

However, the question arises, how did the murderer leave this circle of grass without leaving any traces?

This is unscientific.

In fact, when Chen Yan entered the cement factory just now, he roughly observed the factory area.

In terms of the convenience of dumping the body, the gravel ground where the taxi was parked at this moment was actually the most inconvenient.

Because when entering from outside the factory, you have to walk a certain distance and then pass through thick grass to enter this area.

This factory area has been abandoned for five years, and there is no human habitation, not even homeless people.

The murderer drove his car here, and any spot could be used as a dumping point.

But there is a benefit here too.

That is relative privacy.

Because there are weeds about half the height of a man growing around, the murderer can be more cautious and calm about killing people and cleaning up the scene.

Because, if someone were to kill people here, even if someone came, they would not enter this sandy open space through the weeds half a man high.

To put it bluntly, even if someone does come in, they will make a sound to warn the murderer because they touch the weeds.

For these reasons, the murderer can be said to be very cautious.

This place to dump the body should have been chosen by the other party after careful planning.

But how did he leave? Flying out?

Chen Yan squatted in front of the grass that the taxi was running over, observing carefully.

Chen Yan didn't find any suspicious traces in other places, so the entire grass area could only be found where vehicles had run over it.

Since the taxi body is low and the chassis of the film is relatively low, after running over the grass that is about half a person tall, all the grass in this area has fallen.

In this season, the grass is green and growing vigorously.

Green grass has less friction, so when a vehicle passes by, there will be slippage between the tires and the grass.

In this way, what is formed between the taxi tires and the grass is not a clear tire mark, but a smooth channel.

In the middle of the two passages, there are weeds lying like gravel.

After several hours of recovery, a very small part of the weeds are now standing upright again. I believe that in a few days, all traces here will be swallowed up by weeds.

"Do you suspect that the murderer... left the gravel area from here?"

Wang Fenglei guessed Chen Yan's thoughts when he saw that Chen Yan had been squatting in front of the mark of the vehicle.

Chen Yan nodded and explained: "There are no traces of human traffic in other areas, and it is impossible for the murderer to fly there, so this is the only way for him to get out."

This is actually in line with normal people’s logical thinking.

The grass is dense. Since there is a road that has been paved by taxis, why not take it?

The key is that the method used by the murderer left no obvious traces.

The length of this crushed path is about ten meters, making jumping impossible.

Therefore, the murderer must have used some special method...

In my mind, every part of this passage is showing contrasts over and over again.

The lodging weeds in the middle are very dense, natural in shape, and have no traces of being trampled.

Then there are only two channels left, crushed by the tires on both sides.

Because of the friction between the tires and the weeds, the surface layers of weeds on the two channels have been crushed and mixed together to form a smoother plane.

Chen Yan gently tried to step on it. It was very solid, but his shoe prints were clearly left on it.

Therefore, with the murderer's cautious approach, there would be no such obvious flaws.

The two passages, every detail, kept flashing in Chen Yan's mind.

No matter what method the murderer has to get out, theoretically he should only use one of the passages. If you find the difference between the two passages, you may be able to discover how the murderer got out.

In my mind, the images of the two channels gradually overlapped and I compared every detail.

Um?

After a while, Chen Yan's eyes flashed with light, it turned out to be like this!

Wang Fenglei, who noticed the change in Chen Yan's expression, knew that Chen Yan might have found a clue.

"How's it going? Did you find anything?"

He stood up and nodded: "I probably know how the murderer left here."

"Team Wang, follow me!"

After saying that, Chen Yan led Wang Fenglei past the rutted passage left by the taxi tires on the left and walked about half a meter away.

"Team Wang, see what's different here?"

What's different?

Wang Fenglei squatted down and carefully observed the rutted passage.

Since Chen Yan said there is a problem, there must be a problem.

However, after a while, Wang Fenglei's eyes were sore and he didn't notice any difference between the place Chen Yan pointed out and other places.

"Chen Yan, the difference you mentioned...I can't see it."

Wang Fenglei really couldn't see it.

Chen Yan didn't give in. He had the visual gene lock activated, but others didn't.

"Team Wang, look at the grass thorns here. It's just a 30 centimeter square piece. Is it a little different from other places?"

no the same?

Wang Fenglei lowered his head to check carefully, but...

"I think it's about the same?"

Chen Yan knew that the difference was very small, but small did not mean there was no difference.

Even if Chen Yan turned on the visual gene lock, he didn't notice it at the first time.

It was only after comparing the two rutted passages in my mind that I finally determined that there was something wrong with this place.

"Team Wang, use your mobile phone to take pictures of this area first."

Wang Fenglei didn't doubt that he was there, so he took out his mobile phone and took a picture according to Chen Yan's instructions.

"Follow me to the other side."

When they arrived at the opposite side, Chen Yan still asked Wang Fenglei to take a photo in a symmetrical place where the area he just photographed was symmetrical.

After walking out of the grass next to the rutted passage, Chen Yan took Wang Fenglei's mobile phone: "Team Wang, wait a moment."

After saying that, Chen Yan started to operate Wang Fenglei's mobile phone. Within a minute, Chen Yan handed the mobile phone to Wang Fenglei: "Team Wang, now look at the difference between these two photos."

After taking his phone, Wang Fenglei looked at the screen and found a photo.

It turned out that Chen Yan had just used the merge picture function of his mobile phone to combine two photos into one photo.

However, Wang Fenglei, who could not see anything just now, was indeed wide-eyed now.

“There’s something wrong with the grass thorns in these two photos!”

Wang Fenglei looked at the photos one by one and found no difference, but when the two photos were combined, Wang Fenglei clearly found that there was something wrong with the upright direction of the grass spines in the two photos.

The vehicle rutted path formed by taxi tires crushing the grass. Although a lot of grass has been broken, most of the grass is still alive.

After a few hours, some grass thorns began to stand upright.

However, this upright amplitude is relatively small, and the change is basically imperceptible at a glance.

This is why Wang Fenglei found no abnormality in the rutted channel on one side.

However, after the photos were combined and compared with the passages on both sides, there was a clear difference between the area of ​​the rutted passage on the left and the right.

Grass spines stand upright to a smaller extent.

Chen Yan also handed over his mobile phone: "Team Wang, these are the comparison photos I took of the rutted channel areas on both sides. Take a look."

After taking Chen Yan's cell phone, Wang Fenglei checked it again, but found nothing different.

The photos on my phone are still different.

Chen Yan pointed to the rutted passage on the left and continued to explain: "After committing the crime, the murderer should have evacuated the scene through the rutted passage on the left."

"It's just that when the other party left, he was very thoughtful and did not step directly on the rutted channel. Instead, he should have placed paper shells or something else under his feet."

"In this case, because there is something underfoot, the opponent did not leave any footprints on the rutted channel."

"However, the other party still left a loophole. He ignored that the grass thorns would grow back."

"Normally speaking, the recovery of grass and grass spurs in the rutted channels on the left and right sides should be the same."

"But because part of the rutted passage on the left was trampled by the murderer, the recovery speed will be slower."

"This difference is very subtle and cannot be observed under normal circumstances, but it will be more obvious when comparing the two ruts."

Chen Yan pointed to the rutted passage on the left: "This passage has a small area like this every half a meter or so."

"Team Wang, arrange for people to check the surrounding area, focusing on looking for any paper shells or iron plates with straw pulp on the surface!"

Although the murderer was cunning and cautious, Chen Yan did not believe that the other party was a prepared stepping stone.

Because based on the traces at the scene, it can be inferred that this thing must be at least forty or fifty centimeters long and can hold the murderer's feet.

The likelihood of the murderer carrying something this big was slim.

Therefore, there is a high probability that the other party found the item on site, or prepared it on site in advance.

After using it, the other party will most likely throw it away nearby. After all, it is unlikely that such a big thing will be taken back again.

The way Wang Fenglei looked at Chen Yan...

There are some complications.

This was not the first time I had worked with Chen Yan. When the crime team was first established, a case of corpses being buried in a pond occurred in Shen City.

At that time, Wang Fenglei knew that Chen Yan was good at handling cases.

However, Wang Fenglei didn't expect it to be so powerful.

Before Chen Yan came, Wang Fenglei had actually gone through the scene personally.

To be honest, Wang Fenglei found nothing.

Just like ten years ago, the murderer, like a ghost, cleaned up all traces of the scene.

No witnesses, no surveillance footage, no fingerprints, no shoe prints, no hair, no dander, nothing.

At that time, psychological portraitists were even hired to profile the suspects.

However, there is still no big gain.

I only know that the other party is very cautious and familiar with the distribution of cameras in Shen City...

Nothing else.

But does this bit of information still need to be mentally profiled?

But mental profiling is not fortune-telling. It requires some real behaviors and traces to make inferences.

For fortune telling, you have to ask people about their birth horoscopes.

This time, Wang Fenglei didn't even have any hope.

However, as soon as Chen Yan came, at least two major clues were discovered.

Although no final clues have been obtained yet, at least there is this possibility and a direction for handling the case.

Unlike ten years ago, there was nothing you could do except check and monitor.

Wang Fenglei sent out twenty people at the scene to search for suspicious items in the area.

However, the factory area is too big, and the murderer may take away the stepping stones, so two hours have passed and there is still no good news.

However, after such a long time, the blood in the carriage has completely solidified.

Evidence collection is now available.

There is no need for Chen Yan to get started on this point himself. The investigation and investigation capabilities of the Shen City Detective Team are quite powerful.

However, this evidence collection is not a simple task, and is much more difficult than extracting fingerprints.

After all, it was extracting traces from condensed blood, and it was the first time for these people to do it.

Chen Yan didn't make any excuses and kept watching from the sidelines.

If the thing that the murderer stepped on cannot be found, then the evidence here may be the only evidence.

Fortunately, hard work pays off.

An hour later, the reconnaissance detective responsible for sorting out the blood extracted all the blood: "Team Wang, Team Leader Chen, we have found something!"

Wang Fenglei, who was smoking nearby, dropped his cigarette butt and rushed over: "What did you find?"

"fingerprint!"

"We found fingerprints on the front and rear adjustment iron rod of the main driver's seat!"

Gan!

Wang Fenglei really wanted to look up to the sky and scream at this moment!