Chapter 145: Footprints

Office.

Computers roaring, desktops messy.

Wang Zhong was actively looking for cases, but the actual efficiency was not high.

Mainly because cases are not classified by footprints.

As a type of evidence, footprints are still relatively easy to use. Imagine in a case, there is a footprint that matches the pattern on the criminal suspect's shoes, and the wear is consistent, then it can be used to prove that the criminal suspect once appeared at the crime scene.

However, using footprints as clues is okay for current cases, but backlog cases are slightly insufficient.

Because unlike DNA and fingerprints which have corresponding databases, there is no database for footprints.

As far as the current stage is concerned, in the police database, there are only footprints found at the scene. Basically, one can only use them case by case.

Jiang Yuan looked at Wang Zhong's operation, and after a while, he couldn't hold his temper, and said: "How about this, put the footprint pictures out separately, I seem to be able to see them just now?"

"Is it the meaning of only looking at the footprint pictures? Just look at the picture library?" Wang Zhong didn't understand very well.

Jiang Yuan nodded: "Right, just put the footprint pictures."

"This... without looking at the case, is it okay?"

"I will find a footprint I like first, and then look at the case." Jiang Yuan said.

"Alright." Wang Zhong didn't understand what kind of footprints Jiang Yuan liked, so he found the footprint library and flipped through them one by one.

Jiang Yuan stood by, looking at the footprints in the pictures, information constantly emerging in his mind.

Height!

Weight!

Age!

Foot type characteristics!

Gait characteristics!

Wear traces!

Jiang Yuan wanted to find a special footprint.

It is relatively difficult to use footprints to solve backlog cases, and Jiang Yuan does not pursue solving a case every time he sees a footprint, which is not realistic.

However, Jiang Yuan believes that with such a large picture library and so many scene footprints, he can always find one or two strange ones.

"I'll do it myself." Jiang Yuan saw that Wang Zhong had no other operations, so he didn't need him to keep pressing keys there, which also affected his performance.

Jiang Yuan occupied Wang Zhong's position and scanned the pictures slowly.

Wang Zhong was happy to do so.

Just watching Jiang Yuan's movements from the side, thinking to himself:

Could it really be just the level of doing homework?

It is estimated that it is also learned on the spot, otherwise, it is impossible to have never used it before.

Therefore, the technology learned on the spot should also be not very good.

Just as Wang Zhong wanted to pull away, "Zhi—" Jiang Yuan pushed the chair and stood up.

"Put this case out and take a look." Jiang Yuan gave up the position and signaled Wang Zhong to operate. He was not very familiar with the software here.

Wang Zhong looked at the footprint picture, his eyes couldn't help but condense, and he was surprised: "Blood footprint?"

Yes, what is in the picture in front of him is exactly a pair of blood footprints.

As everyone knows, it is not easy to gather a blood footprint from a minor injury.

And serious injury and homicide, plus the component of a backlog case, are definitely not easy to solve.

Even if it was easy to solve back then, it is estimated that it is not easy to solve now.

Wang Zhong sat back in his position, opened the case, read two sentences carefully, and hurriedly gave it to Jiang Yuan.

Yan Ge, who was in the same office, heard the blood footprint and got up to come over to look.

Jiang Yuan sat down unceremoniously and looked at the case.

The case is not complicated. The male owner of the Yang family in Shanghe Village, on the outskirts of the city, was found dead at home. The murder weapon was a sickle from his own home. There was blood on the sickle, no fingerprints.

In addition, no usable fingerprints and DNA were collected at the scene, but there were a large number of footprint traces.

The direction of the investigation initially suspected disputes between villagers, so everyone in the village was asked, and transcripts were formed. Also, the footprints of the whole village were collected and compared, but there was no discovery.

Later, the direction of the investigation turned to burglary, guessing that the thief was discovered, upgraded to murder in a panic, and fled.

The criminal police in charge then swept through all the thieves nearby, and focused on tracking the thieves who were active in the early stage and disappeared in the later stage, but still failed to solve the case.

Jiang Yuan looked at the string of blood footprints, and then opened the analysis of the footprints to look.

Unsurprisingly, the footprint analysis inside was over a hundred characters long, clearly having been studied and judged by experts.

"Chen Wenming, the trace inspection of our Qinghe City Bureau, is also quite famous in the province for doing footprints. This footprint was given to him to do." The case is less than 10 years old, and Yan Ge remembers it clearly, and the footprints were all handled by him.

Jiang Yuan "En"ed, first scanned towards the conclusion:

Height: 178-185 cm.

Age: Between 18-23 years old.

The direction of landing and lifting feet is consistent; the morphology of the plantar pressure marks and heel pressure marks are basically consistent.

No weight was judged, and the age judgment language is relatively long: in the sequence of footprints, the stride is large, the movement is brisk and powerful, the step angle is small, the step width is narrow... the pressure mark heavy pressure point is on the inner side of the forefoot, the pressure mark is forward... the estimated age stage is between 18 and 23 years old.

Height is judged by the length from the front edge of the toe pressure mark to the rear edge of the heel pressure mark, in other words, the height is judged according to the length of the foot.

This is inconsistent with Jiang Yuan's judgment of footprints.

However, being inconsistent is appropriate. If it were completely consistent, then the judgment Jiang Yuan made, theoretically, would not help the case.

"Look at which police officer is in charge, I will call him to consult." Jiang Yuan made a very humble expression.

This time, Wang Zhong saw through Jiang Yuan's "humility" at a glance, found the phone, and reminded carefully: "It is Captain Wu Junhao of the first squadron, Captain Wu's temper is not very good, don't speak too bluntly."

"Good." Jiang Yuan also had a deep impression on the burly Captain Wu Junhao.

The phone was connected, and Wu Junhao's voice came from the microphone super loudly: "Forensic Doctor Jiang, are there any good things to take care of my brothers?"

Jiang Yuan frowned and looked at the screen, simply pressed the speakerphone, and said: "Captain Wu, I see a backlog case here, which you handled before, want to understand the situation with you."

"Oh, you say... follow that bastard, go around from the front!" Wu Junhao roared, then changed his voice and smiled: "I am catching people, you say."

Jiang Yuan said: "Do you still remember the homicide case of Yang Qian in Shanghe Village?"

Wu Junhao was obviously stunned: "Why did you suddenly mention this case, what did you associate with?"

"I looked at the footprints of this case, I think the height of the perpetrator should be very special. My judgment, the perpetrator's height is likely to be 193 cm. A very conspicuous height." This is the reason why Jiang Yuan chose this case.

The average height of people in Shannan Province is not low, and 180-year-old men can be seen everywhere on the street. But no matter what, 193 cm is a height that stands out from the crowd, which can greatly narrow the scope of criminal suspects.

On the phone, the panting running sound suddenly disappeared.

Wu Junhao asked: "193 cm is very high. Chen Wenming judged it to be 180, maybe 185. How much certainty do you have..."

Jiang Yuan said: "The length and width of sports shoes will be slightly larger than leather shoes, of course, this is a non-essential difference..."

"But starting from this point, I think the sports shoes the perpetrator wore that day were a bit small..." 【145-

"Additionally, the killer's own foot size may be smaller than the normal proportion..."

Jiang Yuan stopped here and asked directly: "When you worked on this case, were there any suspects in the 193 cm height range?"

Wu Junhao seemed to have fallen into deep thought.

A long time passed.

Accompanied by the noisy background on the phone, Wu Junhao said: "I have to go back and check my notes."

Jiang Yuan reminded him: "If it's 193 centimeters, you should have an impression if you saw him."

"Yeah, let me check my notebook first." When facing a specific case, Wu Junhao suddenly became serious.

Jiang Yuan had no choice but to agree. Immediately after, he thought of how in movies and TV shows, those who go to retrieve important evidence are always killed just in time... so he hurriedly added: "Please be careful."

"Got it." Wu Junhao responded loudly, then moved the phone away and shouted: "Catch that little brat for me! If you don't catch him, nobody eats!"

"This kid runs faster than a rabbit."

"Then you guys act like dogs and block him for me!"