When Lin Jiangbei first said the image of the murderer, Zhong Yingcai was still a little disapproving, thinking that Lin Jiangbei was blowing the conch - if Lin Jiangbei said that he could see the height of the murderer from the footprints, this would not be strange. After all, when Zhong Yingcai was attending the Central Military Academy in Nanjing, he also heard the instructor briefly talk about this topic, and knew that there was a certain proportional relationship between height and the length of footprints. Since Lin Jiangbei graduated from the Zhejiang Police Academy, his research in this area is naturally a little more professional than that of those who graduated from the military academy.

Even Lin Jiangbei said that he could see that the murderer's shoulder was skewed to the left, and Zhong Yingcai could understand it, presumably because of the imbalance of his body, there were some unique gait characteristics, which were reflected in the footprints.

But Lin Jiangbei said that he could judge a person's age from footprints, which was a bit too much.

Please, you're a police officer at the police station, you're an agent of the intelligence department, but you're not a fortune teller, how can you tell the age of this person just by looking at the footprints?

But Zhong Yingcai will not say it even if he doesn't think so in his heart.

After all, don't you have to take care of Xu Tiecheng's face?

Besides, except for a small blow of the conch at this time, Lin Jiangbei's previous performance was still very good. Acting boldly, being ruthless, and even fighting skills have merit. Not at all like a young man who has just turned twenty.

But who would have thought that as soon as Lin Jiangbei's voice fell, the lobby manager of the Luodu Hotel over there actually said that he had really seen such a person as described by Lin Jiangbei, and this person came to the Luodu Hotel every day a few days ago to visit Ji Wenguang. Doesn't this just show that what Lin Jiangbei said before was not wrong at all?

"Jiangbei, how did you do this? Is it really possible to tell how old a person is from the footprints he has left? Zhong Yingcai didn't dare Lin Jiangbei to see outside, and immediately asked the question in his heart.

Because Zhu Shaozhou, in addition to the director of the Los Angeles branch of the Central Military Academy, also holds an important position, that is, the commander of the Gongluo Garrison Command. This also means that Zhong Yingcai, as the battalion commander of the service battalion of the Los Angeles branch of the Central Military Academy, is actually responsible for the security and security of the vast area from Gong County, Henan Province to Los Angeles.

He didn't know it before, but now that he has witnessed this magical technique that can judge a person's height, posture and even age from footprints, he must ask clearly, so that next time he encounters this kind of tricky case with only footprints at the crime scene, he will know where to start, right?

"Of course, you can tell a person's age from the footprints." Lin Jiangbei said, "To be more complex, we can conduct a comprehensive analysis according to a series of information such as foot characteristics, stride spacing, and walking status reflected in the footprints left on the scene, and compare and analyze the data from the middle step length, step width, angle, foot lifting strength, and foot landing strength, including indentations, squeezing marks, tread marks, pedal marks, lifting marks, digging marks, etc., and finally we can draw accurate conclusions." ”

Zhong Yingcai was dumbfounded when he heard this, and his face suddenly became bitter, "It's so complicated?" I originally thought that if it was simpler, I would also learn it, and I could use it in the future when investigating cases. Hearing you say that, I have no hope at all! ”

"Hehe, it's not easy!" Lin Jiangbei smiled and shook his head, "Brother Yingcai, it turns out that you have this purpose?" Then I can teach you a simpler way, not so precise, but at least seven or eight percent sure. ”

Zhong Yingcai suddenly smiled, "Huh? So there's an easy way, huh? Okay, hurry up! ”

This simple method is the most common method of indentation. In other words, there is a close positive correlation between the footprint indentation left by walking and age, gender, posture, and height. ”

"Generally speaking, the younger a person is, the greater the pressure on the forefoot when walking, and as the age increases, the pressure surface of the foot gradually moves backwards, and after the age of 40, 80% of the pressure surface moves to the back of the foot."

At the same time, considering that people walk under normal conditions, one foot from the back of the heel along the ground to the front of the forefoot off the ground, generally completed within 0.8 seconds to 0.9 seconds, the time of the forefoot is generally more than 0.4 seconds, and the time of the heel action is only 0.2 seconds. Because the forefoot area has a long time to hit the ground, it is also the most reflective of the age characteristics of the person. ”

"Take a look at these footprints yourself," Lin Jiangbei took a flashlight to shine on the footprints on the ground, so that Zhong Yingcai could watch, "Is there a front foot indentation that is uniform before and after, and there is almost no difference between the inside and outside?" Among people in their early thirties, 80 percent of their footprints are characterized by this pattern. In other words, as long as you see this footprint, you can be at least eighty percent sure that he is in his early thirties. ”

"Of course, if you can combine stride length, gait and other comprehensive conditions, the accuracy rate can reach more than 95%."

"As for how to tell if his shoulder is tilted to the left, it's also very simple. If you look at the contrast between his left and right footprints, the indentation on the outer edge of the forefoot of the left foot has a significant depression, while the outer edge of the forefoot footprint of the right foot has a trace of protrusion. If you compare the other sets of footprints, there are such distinct features. ”

"This is because his shoulder is skewed to the left, causing a slight instability in his center of gravity, which is a clear feature left between walks."

"Well, I see!" Zhong Yingcai nodded, looking suddenly enlightened.

Lin Jiangbei also understood that Zhong Yingcai only understood a general idea at most at this time, but at this time, the case was very important, and he was not allowed to continue to explain to Zhong Yingcai. So he decided to wait for this matter to be over, to see if Zhong Yingcai was really interested in understanding this, and if he was really interested, he would spend a few days to give Zhong Yingcai a make-up lesson, at least so that Zhong Yingcai could master the simple steps of footprint identification, and be able to judge the age of seventy or eighty percent of the footprint owners.

He turned off the flashlight, turned around, and asked the deputy manager of the lobby: "Then since this person has been here for several days in a row, what does he look like, you should remember, right?" ”

The deputy manager of the lobby replied, "Sir, I remember it clearly! ”

"That's it!" Lin Jiangbei nodded and asked Shen Changyin, "Manager Shen, please help me find a blank piece of paper and a pencil." ”

Shen Changyin didn't dare to slack off, and immediately ran back to his manager's office to find white paper and pencils for Lin Jiangbei.

Zhong Yingcai looked at Lin Jiangbei with an incredulous expression, "Jiangbei, what do you want white paper and pencil for?" Don't tell me, you can sketch portraits! ”

"Brother Yingcai," Lin Jiangbei laughed, "Mr. Duan invited Professor Liang Dingming, the great painter of President Chang, to teach us, if I say that I can't sketch, do you think Mr. Duan will let me refund all the living allowance for more than two years in the Zhejiang police to him?" ”

"Your Mr. Duan is really amazing!" Zhong Yingcai shook his head, "Compared to your Zhejiang police students, we must be studying in a fake military school!" ”

"The direction of cultivation is different!" Lin Jiangbei said, "You are going into battle to kill the enemy, we are investigating and handling cases, how can our professional skills be the same?" ”

While speaking, Shen Changyin had already run back with a stack of white paper and two pencils.

Lin Jiangbei chose a room next to it without guests, sat down, and drew on white paper with a pencil while listening to the description of the deputy manager in the lobby. He drew while letting the assistant manager of the lobby look at it, and then adjusted and revised it according to the opinion of the deputy manager of the lobby. Twenty minutes later, a portrait of the suspect that completely matched the memory of the deputy manager in the lobby was fully presented.

Zhong Yingcai took this portrait and said to Lin Jiangbei, "Jiangbei, I'm immediately afraid that someone will let the photo studio remake this portrait and develop it, and then conduct a large-scale search in the whole city of Los Angeles, even if it digs three feet into the ground, I will find out this bastard!" ”

——-

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