Song Junsheng, the person in charge of the fifth group, is an old detective of the Fourth Division of the Shen City Detective.

Song Junsheng has been a police officer for 30 years. Although he is only a team leader, he has a lot of experience.

He did not expect that Chen Yan guessed his investigation conclusion just by listening to the tire track comparison reported by him.

As expected of a ruthless man who can receive first-class merit.

"Team Leader Chen, from the current point of view, we have compared the two car marks in the middle, that is, the marks on the front and rear wheels of the motorcycle."

"By stacking two people in the driver's seat, and riding separately in the front and rear, we compared the depth of the car marks."

"Preliminary inference... The people who threw the corpse are most likely two people."

Two people!

Song Junsheng paused: "Of course, this is just a simulation."

"After all, we didn't find any obvious footprints at the scene, so it's hard to make an accurate judgment."

Any simulation can only say that there is a greater possibility to restore some of the conditions at that time.

But to say, certain, certain, it would be a bit too much.

Moreover, as the old detective said, the other party did not leave footprints on the scene.

Judging from the results of the on-site investigation, the other party used a broom or a branch to clean up the traces of footprints.

As for the tire marks, because the distance from the concrete road was relatively long, the other party did not clean it up.

On the one hand, it may be considered that time is too late, and on the other hand, it may be considered that it is just a tire mark, which will not leave any clues.

"Can the source of the tires be found out?"

Song Junsheng shook his head: "It's difficult, we checked this kind of car mark, it's an ordinary motorcycle, and the sales volume is very large in Shen City."

"Of course, because of the tire marks, every car, even if it's the same brand, has a different level of tire wear."

"Through this point, it is possible to find a motorcycle, but it will take a long time."

Chen Yan nodded, Song Junsheng was right.

Car marks, any car, because the mileage and road sections are not used, the car marks are unique.

However, if you want to find it, it will take a lot of effort.

"Is the driving direction of the motorcycle determined?"

Chen Yan asked again.

According to the direction of the pattern of the vehicle and the direction of the soil when the tire grips the ground, it is possible to infer which direction the motorcycle is coming from and which direction it is going.

Sure enough, Song Junsheng nodded: "This has been confirmed."

"We analyzed the tire marks on the motorcycle at the intersection of the cement road and the dirt road. The motorcycle came from the east, dumped the body after getting off the road, and then drove toward the west after getting on the road."

"That is to say, the other party did not return the same way?"

Song Junsheng nodded again: "The situation at the scene is basically like this."

A clue to the tires...

Basically interrupted.

However, it is not without gain.

At least, it is initially concluded that there is a high probability that the people who throw the corpse are two people.

This is a major breakthrough.

After pondering for a moment, Chen Yan looked at Song Junsheng: "Leader Song, the comparison of vehicle traces must continue."

"The pond contracted by Wang Fugui was developed by Tianyuan Village only last year."

"Also, the remote location, not the local people, should not know the existence of this pond."

"So, the murderer is likely to be a resident of the surrounding village."

"Although the work of investigating motorcycles is rather cumbersome, we must do our best to continue."

Song Junsheng nodded, this work is indeed complicated and tedious.

Motorcycles are very common in rural areas in the suburbs of Shenshi.

Basically every house has it.

And the focus is on two or three best-selling brands.

According to the results of the on-site investigation, the motorcycle the murderer was riding was the best-selling type.

It is conservatively estimated that there are about a thousand of the same motorcycles in the three or five nearby villages.

Less than two hours after Song Junsheng left, news of the fourth group came.

Thorns!

The thorns in the body of the deceased are only found in the nearby Phoenix Village.

Zhang Yifang, the person in charge of the second group, looked excited: "Team Leader Chen, our group visited the villagers in several nearby villages."

"This kind of thorn bar, near the scene, is only found on Fenghuang Mountain in Fenghuang Village."

Phoenix Mountains?

"Where is Phoenix Mountain?"

Zhang Yifang opened the mobile phone map and linked the projection: "This so-called Phoenix Mountain is actually a big mess."

"In the south of Phoenix Village, the surrounding land is barren, and no one usually goes there."

"However, although this mountain bag is not high, the area is not small."

"Look," Zhang Fangzi said on the map: "This area is Phoenix Mountain."

"This kind of thorns grows a lot on Phoenix Mountain, but there are no other places."

Phoenix Mountains…

On the map, there are two cement roads around Phoenix Mountain.

One to the east and one to the north.

It connects Phoenix Village and surrounding neighboring villages.

"How far is this place from the pond where the corpse was thrown?"

"Team Leader Chen, from the foot of the mountain, this eastward road extends all the way to Fenghuang Village, which is about three kilometers long."

"From Fenghuang Village to the east, about ten kilometers, is the pond where the corpses were thrown."

ten kilometers…

This distance is not close.

From the map, the distance of ten kilometers, there are two natural villages in the middle.

If the murderer killed in Fenghuang Village and dumped the body in Tianyuan Village, he would have to pass through these two villages in the middle.

Generally speaking, in rural areas, people are more familiar with their own villages.

Once out of this range, in fact, there is no special understanding of the surrounding terrain.

Unless this person usually goes out a lot and is familiar with the surrounding villages, this is possible.

"Team Zhang, notify Song Junsheng of the fifth group that the investigation of motorcycles will start from Phoenix Village."

Same thing.

If the murderer was not familiar with Phoenix Village, how could he have the unique thorns on Phoenix Mountain?

At this moment, Zhao Haiyang, the captain of the fourth division, walked into the conference room.

"Team Leader Chen, the autopsy results are out."



On the screen, it was the autopsy report.

"The deceased, the exact time of death, was from 2:00 am to 2:30 am on the 10th."

"According to the degree of tooth wear of the deceased, the age of the deceased was no more than 30 years old, and it should be around 28 years old."

"The fatal wound is the thorn bar in the body of the deceased, the cause of death is excessive bleeding."

Chen Yan nodded, and sure enough, although the deceased was soaked in the pool water, he was pale and swollen.

However, when Chen Yan checked at the time, he found that the capillaries under the deceased's skin were very light in color, which was a manifestation of too little blood in the body.

"From the analysis of the degree of immersion of the corpse, the time for the deceased to soak in the water is about 6 and a half hours, so the time for throwing the corpse is 10:30 pm on the 10th."

"The point is that during the autopsy, we found that there was some clay deep in the mouth of the deceased."

"However, since the deceased was thrown into the pond, he was already dead."

"And at this time, the muscles in the throat of the deceased are closed and generally do not enter the debris."

"Moreover, the technical department compared the soil quality in the pond and determined that the clay in the mouth of the deceased was not the soil where the body was thrown."

"And here," Zhao Haiyang continued to introduce: "Part of the wounds on the deceased's face were cut before the deceased died, such as the nose."

"There is also a part that is cut after death."

"Judging from the knife marks in the wound, it should be the same wallpaper knife."

"but…"

Zhao Haiyang zoomed in on the photo of the deceased's face: "These wounds, the scratches during his lifetime, are all from top to bottom."

"The scratches after death, the starting position of the knife, are all from bottom to top."

"Also, the depth of the knife marks is inconsistent..."

Zhao Haiyang introduced while Chen Yan pondered.

Judging from the conclusion of the autopsy, the process of the other party's murder seems to be slowly appearing in Chen Yan's mind.

The opponent used thorns to slowly end the life of the deceased.

At the same time, the deceased is physically tortured.

After the death of the other party, in the process of transporting and throwing the corpse, it seems that the hatred is still not relieved.

The second corpse thrower sitting on the back seat of the motorcycle continued to cut the face of the deceased with a wallpaper knife.

What is the deep hatred that makes the murderer so cruel?

"What is the specific condition of the whip marks on the deceased?"

"That's right. According to the inspection, the latest welt marks on the deceased should be left three to five days ago."

"The oldest trace, UU Reading is probably two or three years ago."

About an hour later, the autopsy report was completed.

Chen Yan began to arrange the work: "The clay in the mouth of the deceased is likely to be the clay at the first crime scene."

"Inform the second group leader Zhang Yifang to collect the soil quality of Phoenix Mountain in Fenghuang Village and compare it with the soil quality in the mouth of the deceased."

Since the thorns in the deceased's body came from Phoenix Mountain, the clay in the deceased's mouth is also likely to be related to Phoenix Mountain.

If the comparison results match, then, the first place of death of the deceased can basically lock Phoenix Mountain.

Buzz!

Zhao Haiyang's cell phone on the conference table rang.



Finding the phone, Zhao Haiyang looked at Chen Yan.

"Someone reported missing!"