When Xu Lin heard Wu Xiaofeng's return, his expression immediately became extremely solemn.

The murderer may have been planning for longer than he thought.

Actually opened the school and the warehouse of the cotton mill, there is definitely a big problem here.

"Check, except for 31 children, all the other people who were burned to death, the identities of them will be dug up for me. The murderer should be among these 8 people.

Xu Lin gritted his teeth and gave the order directly.

He trusted his judgment that if the murderer was not inside, that underground passage had no meaning in existing.

If the murderer is not in it, then he simply does not have time to commit the crime.

The file clearly states that although the warehouse of the cotton mill is full of flammable materials such as cotton wool, cloth, cardboard boxes and foam, there is no fuel and it is impossible to burn for no reason.

And once it burns, it must be a fire within 5 minutes.

At that time, there was surveillance in both the school and the cotton mill, and as long as it came out, it would be discovered.

Another point, there is one less computer on site.

And the surveillance at that time had a brief blur of the picture when it was because of the fire, and if Xu Lin guessed correctly, the murderer had left when there was a problem with the picture.

That computer is one of the murderer's tools.

Xu Lin had almost repeated the entire arson case in his mind.

The killer took control of the group of students and teachers, as well as the people in the warehouse, and then set it on fire, set it on fire, and hid underground for another two days.

He used his computer to disrupt a surveillance of his departure after the fire.

Although this is no longer verifiable, if it were his own, he would do it, and only in this way would the arsonist disappear silently.

The quilt in the underground passage is used to isolate the heat at the time of the fire, because if there is a fire above, the high temperature is poured, even if it is underground, I am afraid that it can be roasted to death.

Use a damp quilt to isolate the heat.

When he leaves, then everything will be fine.

Because...... He was already a dead man, and no one could suspect him anymore.

After receiving the order, Wu Xiaofeng and the three immediately began to investigate the eight people who were burned to death.

Although this will inevitably be resisted by the family, they have no choice for the sake of the case, even if the family's attitude is bad, they can only patiently persuade.

Xu Lin was also in charge of one person, a cotton spinning factory employee named Zheng Xin.

There is no one in Zheng Xin's family, his parents died early, and he is left with only himself.

And because they settled in Nanlinshi City from outside, they are not very familiar with the neighbors, so everyone knows very little about their family's affairs.

Later, Zheng Xin's home was also temporarily used as a warehouse by the neighborhood committee, and it lasted for seven or eight years.

An aunt surnamed Li of the neighborhood committee took Xu Lin and walked into Zheng Xin's home.

Seeing the debris in that room, Xu Lin frowned.

"That... Little comrade, most of this has been cleaned up by us. You see, here you checked it for nothing. Besides, his family is also a victim, you should go and investigate the murderer!

Aunt Li said.

Xu Lin: "You also know that they are victims, so since they are victims, why do you occupy their houses?" You are allowed to remove all that belongs to you in one day. This house, our city bureau will use.

That Aunt Li's face turned red and white when she was said, but she just smiled sarcastically and did not dare to argue.

This matter itself is that their neighborhood committee did not do it properly.

Xu Lin left Zheng Xin's house, which was full of debris, and Zheng Xin's belongings were all moved, and there was indeed no point in digging again.

But not here, his hometown should have.

Xu Lin found the police station in the area, revealed his identity, and asked to trace the original household registration location of Zheng Xin's family.

"Beiyuan Province, Fengyu City, Maojia Town, Shihezigou..." "

Good fellow, this place is really far enough!"

He couldn't help but shake his head, almost 2,000 kilometers smaller, this trip has not been able to get off for half a month.

Let it go first, check a few other people.

The intense verification work continued, and Wei Mingfei was arranged by Xu Lin to be placed in a hotel opposite the city bureau.

In any case, even if Xu Lin knew that he was innocent, but in such a situation, he still couldn't run around, let alone play and disappear, otherwise he really couldn't tell.

Because under this heaven, that is, Xu Lin determined that he was not guilty.

Soon, Wu Xiaofeng, Han Xing, and Xiao Xue returned with thick investigation reports and confession records.

They checked for two full days and interviewed all the victims except Zheng Xin, and the results were similar to those of the previous investigation.

Moreover, these families are basically local, even if two are from other places, that is, in the surrounding provinces and cities, the three have already checked, and they have no problems at all.

Xu Linzi carefully read all the materials they took back, and finally confirmed that there was indeed no problem.

Then the final result is only one Zheng Xin.

Although all three members of their family have died, there must be relatives in their hometown, right?

As long as there are relatives, it can be traced back to the roots.

Then Xu Lin's four-person team, taking Wei Mingfei, went directly north to Beiyuan Province.

The plane flew for four hours, and they finally arrived at Zheng Xin's original place of residence.

When they came to the local police station to learn about the situation when Zheng Xin's family moved out, a police officer in his 50s told Xu Lin about the situation at that time.

"The Zheng family in Shihezigou is an honest family. They have a good relationship in the town, especially the pair of brothers of the Zheng family, and the villagers see it, who does not give a thumbs up. Those two half-sized children..."Boom

!

Xu Lin only felt that his brain exploded instantly, and he grabbed the policeman and asked, "Teacher, what did you just say?" Two brothers, two and a half sons?

"Isn't it half-sized?" The twin brothers, the only twins in Shihezigou at that time, were the Zheng family's. The big guys all said that their Zheng family's blessing is good, the popularity is good, and God is close to them..." Xu Lin's

expression became solemn, and he raised his head to look at the four people beside him.

This case has almost surfaced.

Others have no problems, Zheng Xin has problems.

So this Zheng Xin, what is his name now?

Xu Lin opened his mouth and asked, "Teacher, where are the Zheng family brothers now?"

"I don't know about the second eldest eldest child, but the eldest heard that he went out to work many years ago, and later took back all three of them." No, a few years ago, the boss of their family came back once and sent rice, flour, grain and oil to the big guys! "

Years ago? How long, how long ago? Wu Xiaofeng asked eagerly.

"Four years ago, right? It should have been four years ago. The old policeman said with a reminiscence.

...