As a local policeman, is it appropriate for you to take over the job of a criminal policeman?

Gao Dawen's throat shouted unconsciously. He was actually very dissatisfied with the way the first two cases were handled. A gun was lost and seven people died in your place, but you didn't investigate the case properly. Now, you have come to our place. This is a disaster for us.

Everyone was silent. After Gao Dawen's anger had calmed down a little, Yu Haifeng continued, "Director Gao also said just now that we must not leave this case unsolved."

"From the information provided by Wuzhou and Dingzhou, there was no financial loss in the first two cases, which means the murderer did not kill for money. And this case is the same, the money and watches are all there, the murderer's purpose is not for money."

"Of course, God was kind to our case. There was no fire or heavy rain. We found the suspected murderer's footprints at the scene. They were 43 yards long and belonged to a man. We then collected some soil from the edge of the footprints, which was clearly not from the scene."

"The technical department also compared the footprints of everyone at the scene. None of them were theirs. There was no dirt on their shoes, so they must have been brought by the murderer."

"Everyone checked the crime scene yesterday. There was no surveillance. So the key to our next investigation should be this soil."

Yu Haifeng pointed to the big screen behind him, on which was some dirt scraped from the edges of the footprints. Just looking at it, there was no clue to be made out.

"Captain Yu, did you say where the soil is from?" Ye Lin asked, raising his hand.

Yu Haifeng shook his head. "It's just the soil from our Yuezhou. We can't find anything from it. But the technical department still extracted some sand from it, which looks like the yellow sand used for building houses."

Gao Dawen looked at Ye Lin and asked directly: "Ye Lin, tell me, where should we start?"

Ye Lin stood up, biting the pen cap, holding the notebook with both hands, and pondered for a while, "Director Gao, Captain Yu, I think there are two options. There are only a few motives for murder. It's not for money. The criminal who came here probably didn't do it for love. It must be revenge. We need to find out Zhang Yuan's social relationships and investigate it into revenge killing."

"The other thing is the soil. Zhang Yuan is working on a project, and there is yellow sand at the site. It is very likely that the murderer is at the construction site, or has been to the construction site. I suggest that we check the entire construction site and not let anyone slip through."

Gao Dawen slammed the table directly and said, "Let's get started!"

On the social relations side, Lao Zhao brought Qi Shan and a few others, while Yu Haifeng and Ye Lin brought Wang Longxin and Sun Jinghua to the construction site.

Ye Lin looked at the construction site of the chip factory with deep emotion in his heart. He had just arrived not long ago, and now he had to come here to investigate a case.

The construction site already knew about Zhang Yuan’s death, but he was the project manager and just one of the people on the project, so the project couldn’t be stopped for him.

It was not until Ye Lin and his team arrived that the person in charge of the construction site reluctantly stopped, because Ye Lin and his team had to record statements from everyone and also check the makeshift dormitories over there.

There are more than 400 people on a construction site, and Ye Lin and his team cannot handle it all by themselves. They can only draw people from several police stations.

This took a whole day. Ye Lin and Yu Haifeng did not go to give their statements, but walked through each room to see if there were any clues.

The workers' living quarters are rather simple, and although their belongings are messy, there really aren't many, mostly some quilts, toiletries, daily clothes, and work rubber shoes.

Ye Lin discovered that most of these migrant workers were wearing a type of rubber shoes. He compared the shoe prints found at the scene and found that they were the prints of this type of rubber shoes.

"This is a bit difficult. The usage rate of this type of rubber shoes is so high. How can we find them?" Ye Lin said.

"What about the pattern? Is there anything special?" Yu Haifeng took the rubber shoes and started comparing them.

Some people have special feet, or their walking habits are not right, which can cause the patterns they walk in to be obviously different.

But this time he was a little disappointed, because the shoe prints were relatively new and he couldn't tell the characteristics of the wearer at all.

The two men casually looked through their personal belongings. They were all daily necessities, occasionally a few fruit knives and the like, but no guns.

Even when they arrived at Zhao Dashan's house, they did not find that when Zhao Dashan came back last night, he had found a place behind the house to bury the gun out of the spotlight. He just dug a hole in the construction site and ordinary people could not find it at all.

On the other side, it will soon be Zhao Dashan and others' turn to record their statements.

Zhao Facheng nervously pulled Dashan and whispered, "Brother Dashan, we both went to the hair salon last night. I heard that going to the hair salon will result in a fine. We can't say that later. Let's just say we slept in the room and we can testify against each other, okay?"

Zhao Dashan had a blank expression on his face, but he was very happy in his heart. This was like a pillow being sent to him when he was sleepy. He was worrying about what to say to dispel his suspicion. It would be best if Zhao Facheng took the initiative to say it. He nodded silently.

So when Ye Lin and Yu Haifeng got the confessions in the evening, they suddenly felt overwhelmed. More than half of the people said that they went to the construction site after dinner, but came back soon.

Basically, there are roommates or fellow villagers who can testify, and there are almost no people who act alone.

As for shoe prints, the construction site was mainly populated by men, with more than half of them having size 43 feet, or more than 200 people. Although this could narrow the scope of reconnaissance a little, it did not have any real effect.

The only good news is that the technical side reported that the yellow sand and soil at the scene were the same as those at the Yuezhou chip factory, and it was basically confirmed that they were brought from the Yuezhou chip factory.

Another group that investigated social relations also brought back some useful information: Zhang Yuan is not a local, so he has no relatives in the local area. His social circles are relatively wide, but the people he has been in contact with recently are all suppliers, and the project has just started, so there are no financial disputes for the time being.

However, those drinking buddies talked about some things about Zhang Yuan's past, which made Ye Lin a little interested, and this also had something to do with Ye Lin.

According to them, Zhang Yuan mainly worked for Qiangteng Group last year. Because Ye Lin cracked down on Qiangteng Group, many projects of Qiangteng were suspended. The government initially collected the workers' wages, but did not pay them out.

In other words, he only distributed a part of the money, and kept the rest for himself, and used it to invest in stocks.

According to what he said when he was drunk, the workers didn't dare to ask him for money because if they asked him for money, he would threaten them, saying that they could ask for money, but they should not work for him in the future.