Lin Xinyi did not rush to chase the black shadow that had disappeared into the jungle, but took out the flashlight in his arms and illuminated the ground that the black shadow had just stepped on.

He observed the blazing pillar of light carefully.

"Mr. Lin?" Yuanshan and Ye came to the side curiously: "What are you looking at?" ”

She also followed Lin Xinyi's gaze to the ground:

The ground was covered with a thick layer of dead branches and fallen leaves, and as far as the eye could see, there was only a piece of withered yellow, and there were no footprints left by any black shadows.

"I don't even have footprints, how can I track them?" The distant mountains and leaves are a little puzzled.

"Naturally, there is a way." Lin Xinyi smiled: "Feihong treads the snow and geese leave traces, as long as someone walks through here, it will inevitably cause certain changes to the landform and leave corresponding traces." ”

"For example, in this forest..."

"When a person steps on a fallen leaf, he really doesn't leave a clear footprint."

"But the dead leaves are as light as paper, and the pile of dead branches and fallen leaves cannot bear the weight."

"Human legs and feet are like an 'iron plow', which will be deeply embedded in the dead leaf layer when they land, and will inevitably bring up some leaves from the ground when they move, so that the dead leaf layer will obviously 'turn'."

"And in such inaccessible places, in natural conditions:"

"The most superficial layer of litter is the newly fallen branches and leaves, which are withered yellow, and the original shape is still recognizable."

"Below the surface of the undecomposed leaf litter is a semi-decomposed, coarsely humic layer of litter."

"The fallen leaves in the middle and lower layers have partially broken down, and the color is black-green, and the leaf structure is incomplete."

"So..."

Lin Xinyi pointed to a few inconspicuous black-green leaves on the ground covered with fallen leaves, and explained to the distant mountains and leaves:

"Wherever such black-green leaves appear on the surface of the litter layer, this is where the prisoner has recently moved."

"The black-green leaves that have been trampled on and turned to the surface are the best signs that can help us track down prisoners in the forest."

"I see..."Toyama Kazuha heard it very clearly: "As long as you find these black and green fallen leaves, you can know which direction the prisoner is fleeing!" ”

Her pupils quietly brightened a little, and her expression became much more focused.

And Miss Ye was not interested in reasoning before.

I want to study forensic medicine, just so that I can have more topics in common with my future boyfriend.

But now and then it's a little different.

In the past, she could only play the role of a bystander in the case, and she could only hang up and play the vase the whole time, watching Hattori Heiji show off her reasoning there.

Just standing on the sidelines and watching others play the game, of course, you can't experience the true fun of the game.

So Toyama and Ye have never liked reasoning, and they never thought about choosing a career like a detective or a police officer as their life vision.

Insert a sentence, [Source Change Artifact] is really good, it's worth pretending, after all, there are many sources, all books, and fast updates!

But now, under the leadership of Lin Xinyi, she is participating in the game as a "player".

And the reasoning game that Hattori Heiji is good at is like a black soul, so that those "handicap parties" want to play along, but they can't play at all.

In contrast, Lin Xinyi is like a task elf that will automatically find his way in a third-rate skin-changing mobile game, as long as he has a normal IQ and is willing to listen carefully and follow honestly, there is nothing he can't learn.

"It seems like it's fun to learn this..."

And Miss Ye faintly experienced the fun of criminal investigation and the job itself.

She began to follow Lin Xinyi, and under his guidance, she carefully searched for the black-green fallen leaves on the ground that had been turned over by the "prisoners".

In this way, following these black and green fallen leaves, the two walked all the way through the woods.

"It's kind of going around in circles..."

"Is this guy so afraid of being known that he's snooping here..."

Lin Xinyi couldn't help but muttered two sentences.

The "black shadow" seemed to know that someone was chasing behind him.

So he didn't run straight out of the woods.

Instead, he went the other way, making a long detour through the woods, ready to make a roundabout way back to the trail.

The other party tried to shake off their tracking and prevent them from discovering who the voyeur really was.

But...

"Do you still need to think about it?"

Lin Xinyi sighed helplessly in his heart.

He couldn't help but remind the distant mountains and leaves beside him who were carefully tracking:

"And Miss Ye, who do you think the person who spied on us will be?"

"This..."Yuan Shan and Ye lowered their eyebrows and pondered, their expressions gradually becoming solemn: "Could it be that Director Tsunoda and his comrades are ambushed here after the crime, waiting for an opportunity to take revenge on us?" ”

Lin Xinyi: "......."

I can think of such an outrageous answer, but I just can't guess the correct answer.

Speaking of which, that great detective is also... I bothered to run away so much, and I didn't want to think about who else would come here to peep besides him.

When it comes to feelings, it's so dull.

No wonder you've known each other for more than ten years and haven't been sure...

"Forget it..."

Lin Xinyi gave up the idea of revealing the answer directly.

He still decided to let Yuanshan and Ye find out the voyeur with their own hands, and let her personally determine what that guy thought.

So, Lin Xinyi kept silent and took his new students to circle with the "prisoner".

It didn't take long...

They walked out of the woods and came to a stream.

There was a small rocky beach by the stream, on which were piled up several large mossy rocks and a dense layer of small gravel.

"The prisoner had just followed the stream and stepped on this rocky beach to the left."

Lin Xinyi made a slight observation and gave a conclusion.

"Is it because of the footprints on the rock?"

The distant mountains and leaves are not slow to react.

Because the moss on the rock had obvious slip marks, even a rookie could see it at a glance.

"The slip marks are bright green, and compared to the other dark blue moss, they must have just formed."

"The prisoner did walk through here."

"But, Mr. Lin, how did you determine this direction?

"It's simple." Lin Xinyi talked about the lecture unhurriedly: "You can know if you try to take a step on the mossy rock:"

"If there are scratches on the rocks, the direction in which the tip of the scratch points is the 'rear' of the advance."

"However, in fact, a single footprint on this rock alone cannot determine the direction of the prisoner's escape with such certainty."

"After all, this amount is too small, and it is difficult to explain the problem."

"It is possible that the prisoner changed direction later, or it is possible that he deliberately faked it."

As he spoke, Lin Xinyi pointed to the small stones that were paved by the stream:

"To really confirm the direction of the prisoner's escape, you have to look at the trails on the gravel ground."

"Uh..."Yuan Shan and Ye observed carefully: "Are there footprints here?" How I can't see it..."

In her eyes, there was no trace of the rocky beach except for the pebbles and stones.

"If you look closely, you can see it."

"Although the gravel floor is not easy to deform, it is difficult to leave clear footprints."

"But the weight of a person is still enough to move these little stones and form cracks around the footprints."

"It's like here... When the prisoner landed on the ground, the gravel that had been stepped on moved backwards. ”

"The crack side that is formed points in the direction of progress."

Lin Xinyi explained simply, and quietly accelerated the pace of tracking.

That "prisoner" is very capable of escaping.

After chasing the stream for a while, they soon came to a muddy field that was not covered with gravel.

This sparsely planted mud floor is the favorite terrain for trace inspectors.

Because this terrain is easy to imprint clear and complete footprints, so that the prisoner exposes more information.

"Mr. Lin, here are the footprints left by the prisoners!"

"This trail points to the creek."

"Could it be that the prisoner waded across the stream and fled to the other side of the stream?"

Yuan Shan and Ye pointed to the string of footprints on the muddy ground, and his tone was slightly excited.

Before she knew it, she was immersed in this fun tracking game.

"Ran across the stream?"

Lin Xinyi's expression was a little strange:

In order not to be chased, he did not hesitate to wade across the stream, as for fighting so hard?

However, judging from the direction of the dirt footprints, the "prisoner" really waded into the water.

And the footprints on the gravel can be connected to the dirt footprints, as if this is really the footprints left by the guy.

"Wait..."

"It's a trap set by that guy."

Lin Xinyi stopped Miss Heye, who was full of energy and was ready to chase directly across the river.

"Trap, trap?" The big eyes of the distant mountains and leaves are full of puzzlement.

"That's right..."

"These footprints are not his."

"It's somebody, maybe a mountaineer, who stayed when they came here before."

Lin Xinyi leaned down and carefully observed the footprints on the mud ground:

"See?"

"There has been no rain in the last two days, and the sun is strong today, so the mud is dry now."

"If you step on it, it should leave a relatively clear, flat footprint."

"But look at this trail..."

"The surface of this trail is relatively rough, and it is obvious that it was left behind after the rain and when the weather was wet."

"Because at this time, the soil is damp, the ground becomes wet, and the foot force part will take the soil away, so the footprints will appear scaly and uneven."

Lin Xinyi gave a conclusion:

"So this series of footprints is definitely left by the predecessors."

"And the guy saw this trail left by someone else, so he deliberately walked here, so that his tread marks on the gravel were connected with this trail of dirt, and it looked like the footprints left by one person."

"But actually..."

He took a closer look at his surroundings:

"The guy must have stepped sideways on these moss-free rocks, and then jumped over the mud that was easy to leave clear footprints on the rocks and burrowed into the woods in front of him."

"That way, he doesn't have to leave his footprints on the dirt."

"And it can mislead us into thinking that he turned around and waded across the river and fled to the other side of the river."

"This..."Distant Mountains and Leaves became more and more nervous as they listened:

"The other party is so afraid of being chased by us, and he uses this trap to mislead us."

"He—He's not really Director Tsunoda's fellow party and wants to hide in the shadows and do something bad, right?"

"Hmm..." Lin Xin was speechless for a while:

yes, this guy,...

Even the anti-tracking technique was used.

He is determined to be single for the rest of his life, right?