Sun Xiaolu explained a relatively important piece of information.

"At the beginning of July, Lao Duan told me to buy me a 20-gram gold bracelet and a 20-gram necklace."

"He also said he would take me to Coconut City for a tour."

"Pooh!"

"The money he earns a month is only a few thousand yuan. It goes to his parents and his son's support. There is not much money left at all."

"Where can he buy me a bracelet worth tens of thousands of dollars?"

"Rely on him to buy the bracelet... Hehe, it's not as good as my mother for a month..."

"Anyway, I didn't take it seriously, but if there is anything unusual about Lao Duan, it's rather strange."

In early July, Duan Zhongxin even promised Sun Xiaolu to buy her gold jewelry.

Also take a trip to Coconut City.

Duan Zhongxin's occupation is a truck driver, but his income is not high.

Excluding the cost of maintaining the car and the management fee handed over to the company, the monthly income is a few thousand yuan.

When it is good, it is seven or eight thousand, and when it is low, it is four or five thousand.

The money, in addition to the elderly and sick parents, also pays living expenses for himself and his ex-wife's children.

After seven, seven, eight, eight, there are two or three thousand left in a month, which is not bad.

This money was basically used to buy clothes or other consumption for Sun Xiaolu.

It is almost impossible to save money.

Therefore, Duan Zhongxin wants to buy gold jewelry for Sun Xiaolu and take her to the coconut market.

Sun Xiaolu would naturally find it strange.

Because all of this requires money.

However, a month later, Duan Zhongxin actually died.

So, does his cause of death have anything to do with what Sun Xiaolu said?

Of course this possibility exists.

There are two main reasons for killing people.

One is for profit, the other is for love.

Speaking of feelings, now, it's unlikely.

As far as Sun Xiaolu is concerned, it should be possible that Duan Zhongxin killed others, and others killed him for Sun Xiaolu...

Ha ha.

And for money, Duan Zhongxin's career has no other income.

Then what was the reason for Duan Zhongxin to make a promise to Sun Xiaolu.

office.

Chen Yan was thinking alone.

All the current personnel seem to be the possible murderers.

However, it seems that everyone has reasons or evidence that they are not the murderer.

Duan Zhongxin, how did he die?

The investigation of interpersonal relationships has basically reached a very deep level.

The relevant people are already within Chen Yan's line of sight.

However, these people have no obvious loopholes.

Therefore, Chen Yan must change the way of solving the case.

Since the suspect cannot be found from the interpersonal relationship, it is necessary to find a way from the death itself.

That's how to crack the secret room to kill.

However, Chen Yan had already checked the ground, roof, walls and wooden doors of the red brick house.

impossible.

There is no way a murderer could do anything in these places.

In the entire red brick room, except for a dilapidated bookcase, it was empty...

and many more!

bookcase!

In the red brick house, Chen Yan really observed every detail.

Linoleum on the roof, red bricks on the walls, broken bricks on the ground, hinges on the wooden doors, etc.

But, except for this bookcase.

Of course, this wooden bookcase itself is nothing.

Chen Yan has researched that the bookcase is made of simple solid wood nails, which is relatively simple.

To put it bluntly, it is just a few wooden boards embedded in the wall. The structure is not complicated. At first glance, there is no complicated structure.

However, it is precisely because of this simple structure that Chen Yan overlooked an important piece of information.

Chen Yan did not check the bricks behind the bookcase.

Will there be a problem here?

Thinking of this, Chen Yan picked up the phone: "Captain Hu, tomorrow morning, let's go to the scene again!"

Now, it is night, the light is not good, tomorrow, during the day, I can observe it more clearly.

...

Nine o'clock the next morning.

Abandoned warehouse, red brick house.

Turning on the emergency lights inside, Chen Yan came directly to the bookcase.

"Team Leader Chen," Hu Xueying saw that Chen Yan went straight to the bookcase, and knew what Chen Yan meant: "I also studied this bookcase at the time."

"However, the wall behind the cabinet is fine."

"Although it hasn't been removed, we have checked the outside of the wall where the bookcase is inlaid."

"It's also red brick, with no signs of damage or rebuilding."

Indeed, a few planks were embedded in the wall and nothing could be seen.

The red brick wall outside is still a red brick wall.

There was a thick layer of dust on the bookcase.

There are also traces of groping.

"These traces are the traces left by Duan Zhongxin, Yu Huihui and Tang Muqi when they first woke up and groped for the exit."

Chen Yan nodded.

In this regard, there is a record in the dossier.

When the three woke up for the first time and found themselves locked in a closed dark house, they began to look for an exit.

After groping to the wooden door, the three tried to open the wooden door.

However, after tossing for a long time, the three did not open the wooden door.

At that time, Duan Zhongxin suggested that if people from outside would come in and harm them, he would put the bolt on the wooden door.

After that, the three of them fainted again in a daze.

When he woke up again, it was when Zhang Baoshan reported the case and the detective opened the wooden door.

However, at this time, Duan Zhongxin was already dead.

However, when Chen Yan placed his hands on the edge of a wooden board and exerted a little force, the wooden board moved slightly.

Um?

So loose?

Chen Yan carefully raised his hands to the wooden board, shook it slightly, and the entire wooden cabinet moved with it.

"Captain Hu, Zhao Bing, help."

Seeing this, Hu Xueying and Zhao Bing immediately stepped forward. Together with Chen Yan, the three of them carried the edge of a wooden cabinet and kept shaking.

Click.

The entire cabinet fell off the wall and was taken down.

The bookcase is still intact, not falling apart.

The back wall also showed its original appearance.

Like the surrounding area, it is also a red brick wall.

However, because there are bookcases all year round, the color of the wall is slightly different from the surrounding.

The color is much lighter, and the color of the red brick is more vivid.

In addition to this, there are several voids that appear on the walls.

There are eight holes in the inlaid bookcase.

One at each corner of the four sides.

There are four in the middle.

Chen Yan stepped forward and watched carefully: "Zhao Bing, come that flashlight!"

"it is good!"

After a while, the flashlight was handed to Chen Yan.

Staring at a few holes, Chen Yan observed carefully.

The more he looked, the richer the expression on Chen Yan's face.

The brows also furrowed even tighter.

After a while, after observing the holes, Chen Yan turned to look at the bookcase that the three of them had lifted down.

The bookcase and the wall are held together by mortise and tenon with wooden sticks.

The mortise and tenon with eight holes fix the bookcase to the wall.

However, when Chen Yan and the others just lifted the wooden cabinet, they didn't spend much effort.

Not to mention three people, as long as one person is not afraid of dust on his body, he can get the wooden cabinet down.

Chen Yan originally thought that it was caused by the aging of the tenon and tenon fixing the bookcase.

However, after looking at the hole and the back of the bookcase again.

Chen Yan found that the reason why the bookcase could be easily taken down was not the aging of the tenon and tenon.

The first is the four holes on the four sides of the bookcase, which are empty, and the mortise and tenon above are all on the bookcase.

However, in the hole in the middle, the mortise and tenon have been broken, and there is no function of fixing the bookcase.

Moreover, the broken stubble is relatively new, not the kind that is corrupted and broken, but twisted and broken by external force.

But ~lightnovelpub.net~ Chen Yan and the others did not hear the sound of the tenon and tenon breaking, nor did they feel the force of the tenon and tenon breaking.

So, how did this stubble come about?

Between the lights and flint, all the information gathered in Chen Yan's mind.

Bookcases, stubble, holes, wooden doors, latches, iron wires...

double room...

kill……

security guard……

cries for help...

all of these……

Gan!

This is all a game!

It was the murderer who used everyone to set up the game!

.