Chapter 298 Tracking and Counter-tracking
Lin Xinyi did not rush to chase the black figure that had disappeared into the jungle. Instead, he took out the flashlight in his arms and illuminated the ground where the black figure had just stepped.
He observed the bright beam of light carefully.
"Mr. Lin?" Yuan Shan and Ye approached curiously: "What are you looking at?"
She also followed Lin Xinyi's gaze and looked at the ground:
The ground was covered with a thick layer of dead branches and leaves. As far as the eye could see, there was nothing but dead and yellow leaves, and no traces left by any black shadows could be seen.
"There are no footprints, how can we trace them?" Yuan Shan and Ye were a little confused.
"Of course there is a way." Lin Xinyi smiled: "Feihong walks in the snow, and geese pass by leaving traces. As long as someone walks through here, it will inevitably cause certain changes in the landscape and leave corresponding traces."
"For example, in this forest"
"When people step on fallen leaves, they won't leave clear footprints."
"But dead leaves are as light as paper, and the piled layer of dead branches cannot bear weight."
"Human legs and feet are like an 'iron plow'. When they set their feet, they will be deeply embedded under the layer of dead leaves. When they move, they will inevitably pick up some leaves from the ground, causing the layer of dead branches and leaves to 'turn' significantly." ."
"And in this inaccessible place, under natural conditions:"
"The outermost surface of the litter layer is composed of newly fallen branches and leaves, which appear dead yellow and their original shape can still be recognized."
“Underneath the surface layer of undecomposed leaves is a semi-decomposed, coarse humus layer of litter.”
"The fallen leaves in the middle and lower layers have been partially decomposed, the color is dark green, and the leaf structure is incomplete."
"so."
Lin Xinyi pointed to a few inconspicuous black and green leaves on the ground covered with fallen leaves, and explained to Yuan Shan and Ye:
"Wherever there are black-green leaves like this on the surface of the litter layer, that's where the criminal has been recently."
"These black and green leaves that have been trampled and turned to the surface are the best markers that can help us track criminals in the forest."
"That's it." Yuan Shan and Ye heard clearly: "As long as you find these black and green fallen leaves, you can know which direction the prisoner escaped!"
There was a little more brightness in her pupils, and her expression became much more focused.
Ms. 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 there is something different now than before.
In the past, she could only play the role of a bystander in the case. She could only hang up and play the vase throughout the whole process, watching Hattori Heiji show off his reasoning.
Just standing aside and watching others play games, of course, you will not experience the real fun of the game.
Therefore, Yuan Shan and Ye never liked reasoning, and they never thought of choosing careers such as detectives and police officers as their life goals.
But now, under the leadership of Lin Xinyi, she is personally participating in the game as a "player".
The reasoning games that Hattori Heiji is good at are like "Dark Souls", which makes it impossible for those "handicapped" who want to learn through experience to play.
In comparison, Lin Xinyi is like a task elf in a third-rate skin-changing mobile game who can automatically find his way. As long as he has a normal IQ and is willing to listen carefully and follow him honestly, there is nothing he can't learn.
"Learning this knowledge seems to be very interesting."
He and Ms. Ye vaguely realized the joy of criminal investigation and the job itself.
She began to follow Lin Xinyi, and under his guidance, she carefully searched for the black and green leaves on the ground that had been turned over by the "prisoners".
In this way, following these black and green fallen leaves, the two of them walked through the woods.
"It's pretty good at going around in circles."
"Is this guy so afraid of people knowing he's peeping here?"
Lin Xinyi couldn't help but muttered a few words in a low voice.
The "black shadow" seemed to know that someone was chasing behind him.
So he didn't just run out of the woods.
Instead, he did the opposite and took a long detour through the woods, preparing to take a circuitous route back to the hiking trail.
The other party tried to get rid of their tracking and prevent them from discovering who the peeper was.
but
"Do you still need to think about this problem?"
Lin Xinyi sighed helplessly in his heart.
He couldn't help but asked Toyama Kazuye, who was carefully following the trail next to him, as a reminder:
"Miss Ye, who do you think the person who spied on us could be?"
"This" Toyama and Ye lowered their eyebrows in thought, their expressions gradually becoming solemn: "Could it be Director Tsunoda and his accomplices who were ambushing here after the incident, waiting for an opportunity to retaliate against us?"
Lin Xinyi: "."
I can think of such outrageous answers, but I just can't guess the correct answer.
Speaking of which, the great detective was also trying so hard to escape, and he didn't even think about who else would come here to peep here besides him.
So slow when it comes to talking about feelings.
No wonder you two have known each other for more than ten years and still haven’t established a relationship.
"never mind."
Lin Xinyi gave up the idea of revealing the answer directly.
He decided to let Yuan Shan and Ye find out the peeper with her own hands and let her determine for herself what the guy was thinking.
Therefore, Lin Xinyi remained silent and led his new student in a circle with the "prisoner".
not long after
They walked out of the woods and came to a stream.
There is a small stone beach beside the stream, with several large moss-covered rocks piled on it and a dense layer of small gravels.
"The prisoner just walked along the stream and stepped on the rocky beach to the left."
Lin Xinyi made a short observation and came to a conclusion.
"Is it because of the footprints on the rock?"
Yuan Shan and Ye's reaction was not slow.
Because the moss on the rock had obvious slip marks, even a rookie like her could see it at a glance.
"The skid mark is bright green. Compared with other dark blue moss, it should have been formed recently."
"The prisoner did pass through here."
"But, Mr. Lin, how was this direction determined?
"It's very simple." Lin Xinyi started the lecture calmly: "You will know if you try to take a step on a mossy rock:"
"If there are scratches from footprints on the rock, the direction the scratches tip points is the 'back' of the advance."
"However, in fact, it is not possible to determine the direction of the prisoner's escape with such certainty based on this single footprint on the rock."
"After all, the volume is too small and it is difficult to explain the problem."
"It's possible that the prisoner changed his direction later, or it's possible that he deliberately forged it."
As he spoke, Lin Xinyi pointed to the small stones scattered along the stream:
"To really confirm the direction of the prisoner's escape, we have to look at the series of footprints on the gravel ground."
"Um" Yuan Shan and Ye observed carefully: "Are there any footprints here? Why can't I see them?"
In her eyes, the rocky beach was just pebbles, with no traces on it at all.
"You can see it if you look closely."
"Although the gravel ground is not easily deformed, it is difficult to leave clear footprints."
"But the weight of the person was still enough to move the small stones and create cracks next to the footprints."
"Just like here. When the prisoner's feet hit the ground, the gravel he stepped on would be forced to move backwards."
"The side of the crack that is formed points in the direction of progress."
Lin Xinyi explained briefly and quietly accelerated the pace of tracking.
The "prisoner" was very good at escaping.
After chasing along the stream for a while, they soon reached a muddy area not covered with gravel.
This kind of muddy land with sparse vegetation is the favorite terrain for trace inspectors.
Because this kind of terrain can easily leave clear and complete footprints, allowing prisoners to expose more information.
"Mr. Lin, there are footprints left by prisoners here!"
"The tracks lead to the creek."
"Could it be that the prisoner waded into the water and escaped to the other side of the stream?"
Yuan Shan and Ye pointed to the string of footprints on the mud, with a slightly excited tone.
Unknowingly, she had become immersed in this interesting tracking game.
"Escaped to the other side of the stream?"
Lin Xinyi's expression was a little strange:
In order not to be chased, he even waded across the stream. How hard was it?
However, judging from the direction of the dirt footprints, the "prisoner" really waded into the water.
And the footprints on the gravel just happened to be connected with the dirt footprints. It seemed that these were really the footprints left by that guy.
"etc."
"This is a trap set by that guy."
Lin Xinyi called out to Miss He who was full of energy and was about to chase him across the river.
"Trap, trap?" Yuan Shan and Ye's big eyes were full of confusion.
"That's right."
"This set of footprints is not his at all."
"But there is someone, maybe a climber, who stayed behind when he came here before."
Lin Xinyi leaned down and carefully observed the footprints on the mud:
"see it?"
"It hasn't rained in the last two days, and the sunshine is strong today, so the mud is dry now."
"If you step on it, you should leave relatively clear and flat footprints."
"But look at this series of footprints."
"The surface of this series of footprints is relatively rough. It was obviously left after rain and when the weather was humid."
"Because the soil returns to moisture at this time, the ground becomes wet, and the soil is taken away by the contact area of the foot, so the footprints appear scaly and uneven."
Lin Xinyi concluded:
"So this series of footprints are definitely left by predecessors."
"And that guy saw this string of footprints left by others, so he deliberately walked here and connected his tread marks on the gravel with this string of dirt footprints. It looked like the footprints left by one person."
"But in fact."
He carefully observed the surrounding environment:
"The guy should have stepped sideways on these moss-free rocks, then jumped over the rocks on the muddy ground where it is easy to leave clear footprints, and got into the woods ahead."
"That way he doesn't have to leave his footprints in the dirt."
"And it can also mislead us, making us think that he turned and waded across the river and escaped to the other side of the river."
"This" Yuan Shan and Ye became more and more nervous when they heard:
"The other party is so afraid of being caught by us, and they even use this trap to mislead us."
"He, he can't really be an accomplice of Director Tsunoda and want to do bad things in secret, right?"
"Well" Lin Xinyi was speechless for a while:
Yeah, this guy
He even used anti-tracking techniques.
Does he really want to be single for the rest of his life?