Qi Yuan began to walk around the convenience store cautiously, and every trace that he thought was suspicious had to be watched for a long time.

He even borrowed a tape measure from the trace inspector, carefully measured the footprints, and recorded the relevant data in a small notebook.

After a long time, he was squatting on the ground, studying a footprint with his pen on his chin, when he suddenly felt that the light was dim, and a huge shadow of a humanoid silhouette appeared in front of him.

He instinctively looked up and saw Su Ping standing in front of him, and immediately stood up and shouted, "Team Su." ”

"Hmm." Su Ping responded, took off his gloves, and nodded: "Since you don't want to go back, then okay, come with me." ”

"Where to go?" Qi Yuan was stunned for a moment.

"Wrap up." He said indifferently: "It's late, let's go." ”

Qi Yuan pursed his lips, a little reluctant.

But Su Ping didn't care what he thought at all, and left directly. He stayed where he was for a while, and when he came to his senses, he could only quickly follow, run out of the convenience store, and watch his colleagues close the roller shutter door and put a temporary seal on it.

Su Ping still didn't care about Qi Yuan, and after getting into a car with the forensic doctor, he left directly.

"Xiao Qi!" Suddenly, Brother Song beckoned to him, he turned around, immediately showed a smile, and ran over.

"Xiao Qi, don't you mind if I call you that, right?" Brother Song also smiled and said, "Let's go, take my car back." ”

"Okay, thank you, Brother Song."

"Don't be so polite." He shook his head and got into the cab, Qi Yuan hurriedly sat in the co-pilot and pulled up his seat belt.

After driving for a while, Brother Song suddenly asked, "What do you feel about the first time you go out to the scene?" ”

"I don't know," he thought for a moment, then shook his head and replied truthfully, "To be honest, I'm still a little confused." ”

"That's right," Brother Song nodded and said softly, "It's normal." Newcomers who appear on the scene for the first time, there are all kinds of performances, excited, nervous, and confused like you, many of them. It's good to get used to it. ”

Qi Yuan pursed his lips and didn't speak.

Brother Song asked again: "I saw that you also observed the scene for a while, how, what did you find?" ”

When it came to business, Qi Yuan immediately became serious and replied seriously:

"The scene was very messy, but only a few of the goods on the ground were trampled on, and although the shelves were toppled, there were not many signs of impact and other violent damage on them."

Brother Song snorted and motioned for him to continue.

He paused, thought for a while, and continued: "In addition, although the deceased had exaggerated movements and distorted expressions, he was lying on the counter well, so I think that even if there was a fight between the deceased and the murderer, it was not violent, and these traces of destruction at the scene should be committed by the murderer."

Combined with the several shelves near the counter, there are obvious traces of rummaging, and the murderer must be looking for something. Therefore, I think that the murderer's motive may be to make money, and this case is suspected of robbery and homicide. ”

"Wealth?" Brother Song pursed his lips, shook his head and said, "No." Because the real valuables are not on the shelves, but in the glass counters on the cashier's side.

There are a lot of high-end cigarettes, lighters, and a lot of red wine on the back shelf, but these are all in good shape, and there is no trace of the cash register being turned over. Obviously, it can't be for money. ”

"That's ......" Qi Yuan recalled what he saw and heard at the scene, and he knew a little in his heart.

Seeing that Brother Song didn't speak again, he continued: "In addition, there are a lot of blood footprints at the scene, which I think are very high-quality and important clues. ”

"Oh?" Brother Song heard this, and immediately encouraged: "Let's talk about it." ”

"Hmm." Qi Yuan opened the notebook, glanced at it, and said:

"First of all, the sole pattern, the wave, fold pattern, this pattern has good dry land slip resistance, but when wet, it will not become, and at the same time has a considerable degree of aesthetics, is cloth shoes, sneakers and other daily and indoor and outdoor sports footwear usually use the pattern.

Looking at other features, the heel of the sole is with a root, a two-petal design, the arch area is narrow and thin, and the traces of the inner support beam structure can be seen, and the sole pattern is relatively complex, there are obvious side stems, and the trademark is slightly blurred, but it can still be judged that it is a Nike shoe, and the position looks very standardized, and there are more anti-wear patterns and heat transfer round holes on the back and outside of the heel.

These characteristics indicate that the shoes worn by the murderer were made of rubber soles made by the molding process, and it is speculated that they should be adhesive cloth footwear, such as basketball shoes, volleyball shoes, etc. Combined with the characteristics of wide forefoot, deep curved grooves, and incomplete shoe prints, it should be basketball shoes.

The degree of wear and tear of the sole pattern shows that the killer of these shoes has been wearing it for a long time, and even the anti-wear pattern has shown a considerable degree of wear.

Finally, judging from the shoe length and step spacing, the murderer's height should be between 1.82 meters and 1.85 meters, which is quite tall in the south. Speculating on the gait, its supporting foot should be the left foot. Complete. ”

After reading it, he raised his head and looked at Brother Song, wanting to hear what he had to say about his discovery.

Soon, Brother Song nodded and said, "Yes, the knowledge in the textbook is not bad." ”

"Uh......" Qi Yuan scratched his head, maybe Brother Song's temper was relatively gentle and very affinity, Qi Yuan was not so restrained in front of him, and said with a wry smile: "It's just that the knowledge of textbooks is not bad?" The implication is that you don't know how to be flexible, right? ”

Brother Song coughed dryly twice and said with relief: "You don't have to be too ashamed, after all, you have never been in contact with the scene before, and you can master what you should master, even if it is just a mechanical note, it is considered to be passing."

As for the rest, slowly accumulate experience. There is a gap between textbooks and practice, otherwise why do you have to let you do an internship for a year, and then pass the police recruitment exam for another year after graduation? Right. ”

Qi Yuan shook his head, didn't defend himself, only humbly asked: "Brother Song, can you tell me, what is wrong with me?" ”

Brother Song thought about it and didn't answer directly, but only asked, "Did you take a photo of the scene?" ”

"Uh......" Qi Yuan didn't answer directly, but asked a little puzzled: "Can you still take pictures?" ”

"Of course, as long as you don't spread it, it's fine, otherwise you will be punished." Brother Song replied.

"Then ......," he said very weakly, "then I will shoot it." ”

The corners of Brother Song's mouth twitched slightly, and he coughed dryly twice, and said, "Then you can take a good look." ”

Qi Yuan blinked: "Can you give me some hints?" ”

"Didn't you already have a hint?"

"......" Qi Yuan had no choice but to hold his mobile phone and stare at the photos he took to study them carefully.

After a while, he asked uncertainly, "Gait?" ”

Brother Song didn't say anything, only let him continue.

He organized the language before he continued: "In general, the footprints on the scene show a pattern that the toe is relatively clear, and the heel is relatively light.

At first, I just thought it was because of the normal gait, and the center of gravity instinctively fell on the forefoot, but ......"