Jiang Junyan's life at the university was very rich, and he realized that there were more people. Yang Zhangzhi was a real passerby for him, and he couldn't even remember his name at all. If Zhuo Lefeng hadn't mentioned it to him in advance, Jiang Junyan would have really smeared this alumnus.

In view of the fact that Ma Sancai's death has spread among the delivery workers, after the meeting, Zhuo Lefeng did not need to foreshadow too much, except for chatting about the school, he pointed the topic to this case.

Yang Zhangzhi said that he knew Ma Sancai, and he also knew that this person had been working hard and was bent on making a lot of money. He had also heard people say before that Ma San had to provide for his sister's education, and his parents at home were not in good health, so he had been working hard to make money. There is basically no amateur pastime, and the money earned is basically sent home.

'Selling customer information? Yang Zhangzhi was also surprised, "As you know, the delivery staff will be punished or even blocked by the platform if they leak customer information at will." Of course, as you just said, it's not uncommon for people to expect some customer anecdotes in the group. It's just that someone really deliberately collects this information to sell? Or even get killed because of these trafficking information? ”

Yang Zhangzhi couldn't figure it out, and he didn't believe it either.

Jiang Junyan also knew more or less about this case, and in his opinion, Ma Sancai's death must be more than just leaking information.

Since he has been deliberately collecting customer information, and even collating it. It is not excluded that he discovered some unknown secrets by sorting and inducting. It was precisely these secrets that revealed something that Ma San used to get money, and then was killed! ”

After listening to this, Zhuo Lefeng thought thoughtfully: "But what ulterior secrets can you get by relying only on the chat records of the delivery staff?" ”

Jiang Junyan shrugged his shoulders: "It's hard to say, maybe people look at it from a different angle than us?" ”

After saying this, Jiang Junyan felt a little open-mouthed, and hurriedly looked at Yang Zhangzhi with apologies in his eyes.

But Yang Zhangzhi didn't seem to react at all, just said calmly: "What Jiang Junyan said is not unreasonable. Many times, we food delivery people do look at people from different angles. For example, we can often tell from the customer's comments that the person is alone at home, or living habits. And if you often go to a client's house and see how he dresses and speaks, you can tell what kind of temper the person is. For another example, from the time point outside the person's order, as well as the taste, you can judge the person's work and so on. ”

Takeaway workers, especially those who take a large number of orders, come into contact with a lot of people. Over time, when they see customer information, they can know a lot of things that ordinary people can't tell.

Ma Sancai himself has been a champion in taking orders, and his work is meticulous and conscientious, in the past two years, he must have explored some ways to collect customer information.

So, the next task for the police is tricky. They need to find out the key information points that may cause Ma Sancai to be killed from the large amount of customer information of Ma Sancai.

As soon as he thought of this workload, Jiang Junyan cast a sympathetic look at Zhuo Lefeng. Yang Zhangzhi said that it is very difficult to verify the information of the customers he contacts one by one, and if possible, Zhuo Lefeng has to find another way.

So far, where are the other approaches? Killing people needs to be quiet, Ma Sancai was killed for no reason, and in terms of the means of committing the crime, eighty percent of them were professional killers. What does it take to get a professional killer to play?

After a brief reunion between the three, Yang Zhangzhi had to continue working, and before leaving, he told Zhuo Lefeng that if he needed his assistance in this case, he would definitely do everything he could to help.

From beginning to end, Yang Zhangzhi rarely mentioned his own affairs. This is very different from when he first saw Zhuo Lefeng and talked eloquently.

"He seems to be more enthusiastic about you than he is for me." Jiang Junyan saw that Yang Zhangzhi's attitude was different, "He is a little wary of me. More reassuring to you. ”

"Because the police will be reassuring!"

"Cut, come on. I'm afraid it's because he thinks people like me don't need to pay attention, and in the end, he looks down on me a little. Jiang Junyan sighed, "Anyway, I'm used to it." In the eyes of many people, you Zhuo Lefeng is calm and atmospheric. I'm just a hanger. But Officer Zhuo Da, about Ma Sancai's case, do you really plan to review and sort out the chat information of those delivery people from beginning to end, and find out some clues? ”

Zhuo Lefeng said this and his heart was empty. Not to mention that this workload is huge, even if this work is completed, there are still information points that Ma Sancai knows in his own heart but cannot collect those contents that are displayed in the chat.

Therefore, this one really has to try, but Zhuo Lefeng has to look for clues from another angle.

The method of killing Ma Sancai was skillful, and he was basically a professional killer, and the scene was handled very cleanly, and no other biological evidence was found. There was no phenomenon of breaking into Ma Sancai's room, which proved that this person had a way to enter the house. There are no traces of fighting and destruction at the scene, and with the bottom-up strangulation marks on Ma Sancai's neck, it is almost certain that the murderer occupies the absolute initiative in height and strength, and at a certain point in time, the murderer may have coerced Ma Sancai, so that Ma Sancai fully cooperated with him to complete some things.

"The official report of the medical examiner is out!" Early the next morning, Jin Xiaochen handed the report to Zhuo Lefeng, "In addition to the seven known fatal knife wounds and strangulation marks on the neck, the forensic doctor did not find poisoning through autopsy and physical testing, but this mark was found on Ma Sancai's buttocks. ”

Zhuo Lefeng looked at the photos on the report, and the whole person couldn't cry or laugh, and at the same time, his eyebrows were tightly stirred.

It was true that there were no other abnormalities on Ma Sancai's body at the scene before, but after the body was sent for examination, the forensic doctor took off Ma Sancai's clothes and found that there was a seal pattern on Ma Sancai's buttocks.

"Horse word! Ma Sancai's surname is Ma, and he has a horse character printed on his buttocks? This is what he printed himself? ”

Jin Xiaochen shook his head: "It has been written on the report, the seal is relatively new, and it is basically determined that it was printed at the time of death." ”

In other words, the killer not only strangled Ma Sancai, but also killed Ma Sancai with as many as seven fatal knife wounds. Then, after Ma Sancai died, he took off Ma Sancai's pants and printed a horse character on his buttocks. Then he put on his pants for Ma Sancai. From beginning to end, the murderer left no other clues of evidence! I'll go, this murderer is so perverted and has such a heavy taste! ”

Jin Xiaochen sneered: "You still have the heart to joke, which proves that your brain is not completely messed up." ”

"What else can I do. This case is so bizarre that I can't even figure out the motive for the crime now. Is there any progress on the chat history? ”

Jin Xiaochen still shook his head: "The people in the information technology department have summarized and sorted out the chat information of the delivery staff, but so far there is no way to find the fatal information point." Of course, some of these chats do leak customer information, and we have already communicated with the platform on this matter to prevent this from happening again in the future. ”

Zhuo Lefeng pouted: "It's normal for the delivery staff to chat privately about things at work, so you can't stop them from communicating." So it's a bit of a dilemma. What about on-site visits? ”

"Xiao Zhang: They have been visiting the surrounding area since yesterday and have collected some clues. It was more than three o'clock in the afternoon when the police went to find Ma Sancai that day, and the peak period of food delivery had passed, so at this time, some of the food delivery staff had already returned to their residences to rest, or chatted in twos and threes. According to neighbors and Ma Sancai's colleagues, Ma Sancai rarely returned to rest when he shared a house with others before, and even at this point in time, he was still outside to take orders at any time. But after he rented it alone, he basically returned to his residence after two o'clock to rest for a while. On the same day, someone did see Ma San returning to his residence at around half past one. Because Ma Sancai's residence is in the old area of the old city, the number of cameras is limited. After we called up the surrounding surveillance, we only found that Ma San appeared near the community at about half past one, but there was no way to determine whether he entered the house at that time. ”

Zhuo Lefeng added: "So I can't know who approached Ma Sancai's residence!" ”

"Not bad. The place was rented temporarily by migrant workers from other places and suburban counties. Many people don't go home at all. Even if someone is at home, it's mostly because they work three or two shifts to rest at home to catch up on sleep, and no one cares about a delivery person coming home to rest. Therefore, we have no way of determining what time Ma Sancai entered the house, and then who approached Ma Sancai's residence. ”

"That's it?" Zhuo Lefeng grinned, "Isn't this the same as not checking?" ”

"On the surface, it's the same, but if you think about it, there are still a lot of discoveries. For example......"

"For example, Ma Sancai usually goes home at about two o'clock. But judging from the surveillance and witnesses at the scene, he went home at half past one that day. For another example, the special circumstances of Ma Sancai's residence allowed the murderer to commit the crime calmly. Because the killer knows that not only are there limited cameras around, but it is difficult for anyone to witness and pay attention. These two points can be obtained, one of them, Ma San went back half an hour earlier that day, what is this going to do? Second, the murderer must have investigated the scene, so he will boldly commit the crime at the scene! I think Xiao Zhang and the others must still be inquiring and investigating on the spot to see if there is often the same stranger in the surrounding area in the past two days! ”

"Clever!" Jin Xiaochen gave a thumbs up, "Xiao Zhang, their efficiency is quite high, and it has been determined in different populations that there is a man who is close to one meter nine tall and is used to wearing tight T-shirts and jeans. The man was wearing sunglasses and a cap, so it was impossible to determine his appearance. We've been looking for a mapping expert to try to simulate what this person looks like, and we're also looking around to find him as soon as possible.

People who are close to 1.9 meters tall should stand out in the local area and attract attention at a glance. If you can simulate the basic appearance, and if he still appears repeatedly in the surrounding area, you should be able to find out right away.

In addition, this person satisfies the possibility of Tsushima Sancai completing strangulation from the bottom up in terms of height, so this person is very suspicious now.