Footprint identification!
As the name suggests, it involves identifying a suspect based on their footprints.
This technology is actually a very profound subject, and even if you study it, you may not be able to learn it.
But a siren from the future directly instilled all this knowledge into Guan Feng.
Provincial-level proficiency!
This also means something in the field of footprint identification.
In the entire Jiangnan Province, only two or three senior experts in the department can compare to him.
A true expert!
Guan Feng withdrew his inner gaze and focused his attention on the footprints on the ground.
Footprint length...
The stress coefficient of soil...
Step size...
Crane foot...
The data points appeared like slides.
The images automatically surfaced in Guan Feng's mind and were pieced together.
Gradually.
A figure appeared.
It's as if I'm stepping on these footprints.
They slowly and heavily tossed the body into the grass.
"You're the one!"
Guan Feng pulled the figure out of his mind.
......
at the same time.
Zheng Yuandong also rushed to the scene.
After a preliminary understanding, he frowned and said, "Judging from the modus operandi, it does indeed seem very similar!"
Li Xiangdong suggested, "Captain Zheng, should we combine the cases for investigation? That would save manpower and prevent the two teams from being overwhelmed."
Zheng Yuandong waved his hand and said, "At present, it only looks similar. We still need to wait for the test results from the technical department!"
Li Xiangdong said to himself, "Captain Zheng, if you ask me, it's not entirely a bad thing that such a serial murder case has occurred in our jurisdiction. Maybe it will also help solve that cold case from twenty years ago. Wouldn't the bureau recommend us for commendation then?"
Zheng Yuandong: "..."
Everyone: "..."
A brief silence.
Zheng Yuandong frowned and said, "Hey kid, do you have nowhere to vent your energy? Go! Check all the fishermen over there, don't miss a single one."
Li Xiangdong's face immediately fell.
The others remained silent.
This Li Xiangdong is really something. He's usually a chatterbox, but he dares to joke around in this kind of situation. Didn't you see that the captain and team leader still don't look happy?
The case occurred three days ago.
The investigation has been going on for so long, but they haven't found any clues and are at their wits' end.
At this moment, Guan Feng finished examining the footprints, looked up at Zheng Yuandong and said, "Captain Zheng, it is still debatable whether this case involves the same person as the one from three days ago, but it is definitely not the same person as the unsolved case from twenty years ago!"
The sound suddenly rose.
They all instinctively looked over.
I don't understand where Team Leader Guan got that from.
Zheng Yuandong asked, guessing, "Guan Feng, what did you discover?"
Guan Feng pointed to the footprints on the ground and said succinctly, "These footprints are generally quite deep. Combined with the bearing pressure of the soil, the force clearly exceeds that of an ordinary person. They should be the footprints left by the suspect when he dragged the body."
Zheng Yuandong nodded: "Go on!"
Guan Feng said, "Based on the analysis of the footprints, I believe the suspect should be a young man around 25 years old, about 1.76 meters tall and weighing about 140 kilograms. How could such a suspect, who was only five or six years old twenty years ago, be the murderer who killed seven adult women?"
The expressions of the group all changed.
Can you tell this from footprints?
Everyone harbored their doubts.
Three days ago!
Guan Feng was transferred back from southern Yunnan and directly appointed as the leader of the second group of the second squadron.
Out of respect for organizational discipline, everyone kept quiet, but they all secretly wanted to acknowledge the importance of the group leader.
The result was that they immediately presented a footprint analysis?
That's a bit of an exaggeration.
Zheng Yuandong asked, "Xiao Guan, you also know about footprint identification?"
Guan Feng nodded and said, "I've been particularly fond of this since I was in school. Later, I did some special research in southern Yunnan, so I'm quite proficient."
He didn't want to make any definitive statements.
After all, this was his first time appearing at a live event since arriving in Hua'an.
Being too certain can make people think he's instructing the criminal investigation team leader on how to handle a case.
Zheng Yuandong frowned.
skilled?
He knew how difficult it was to master footprint identification.
He had studied this skill diligently when he was in police academy, and even sought advice from various sources.
But this technology seems to be a tiny mistake that could lead to a huge error!
In the simplest way of determining height, the general formula is: an adult's height is approximately 6.845 times the length of their foot.
But you can round it up!
The difference is only three to five centimeters.
Don't even think about learning it without a lot of theory and practice.
After starting work, Zheng Yuandong felt that he was quite capable and was determined to succeed. However, after being disappointed, he realized that some things cannot be accomplished by hard work alone.
You have talent!
How can a young person who has only been working for a few years tell themselves that they are proficient?
How can he believe it?
Zheng Yuandong didn't jump to conclusions, but asked, "How did you figure that out?"
"There is a certain proportional relationship between a person's height and foot length. Combined with stride length and gait characteristics, a preliminary judgment can be made."
"And what about the weight?"
"This is simpler. By comparing the soil's stress coefficient with the pressure of a footprint, we can calculate the stress and estimate the weight."
Zheng Yuandong nodded.
Although he couldn't tell right from wrong, his theory still made sense.
Li Xiangdong couldn't help but ask, "Team Leader Guan, what about age? It can't be based on leg length and weight distribution, can it?"
Guan Feng said, "This is indeed a bit more complicated. Age determination generally uses the indentation method. Indentations refer to the areas of footprints that have experienced greater pressure, and are divided into pressure surfaces, pressure points, pressure edges..."
"As we age, the pressure surface of the forefoot will shift further back and expand outwards."
He squatted down and pointed to the footprints on the ground, saying, "Look at these footprints, pressed down hard... pressed a little..."
As Guan Feng explained, everyone's expressions became increasingly surprised and uncertain.
Putting everything else aside, this theory is quite intimidating.
Li Xiangdong was the first to give a thumbs up and chuckled, "Not bad, Team Leader Guan. I was a little unconvinced at first. Where did this guy come from? He's about my age and he's already a team leader. Isn't that ridiculous? I didn't expect you to have such a special skill! Not to mention us, no one in the Municipal Bureau would have this ability, right?"
Guan Feng laughed and said, "You think you can skip the investigation by just flattering me?"
Li Xiangdong immediately deflated.
"Ha ha!"
The others laughed.
The somber atmosphere was somewhat dispelled.
Zheng Yuandong asked, "Guan Feng, are you confident about what you just said?"
Guan Feng met Zheng Yuandong's gaze and nodded, saying, "I'm confident."
Zheng Yuandong patted Guan Feng on the shoulder and nodded, saying, "Xiao Guan, don't worry. When I first started working, I was just as daring and adventurous as you. Whether it was right or wrong, at least it was a direction for investigation."
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