Chapter 539： key evidence

@@Actually, Chen Yan tapped with his fingers. When the auditory gene lock was turned on, it was easy to hear whether there was an empty drum under the tile.

It's just that when you tap something like steel bars, the sound will be easier to distinguish, and it can be heard with Liu Qingshan's ordinary hearing water quality.

After a while, Liu Qingshan turned back and handed over the short steel bar in his hand to Chen Yan, and he still had one in his hand.

The bathroom is not big, two people have two walls, and they start to distinguish.

"Chen Yan, something doesn't seem right here."

There were two bricks in the middle of the south wall that Liu Qingshan was in charge of knocking, and there was an empty sound of dong dong dong.

Chen Yan also heard it clearly, but only two bricks...

This range is a bit small: "It is very likely that the mortar inside the tile is empty, pry it open and see."

"it is good!"

Liu Qingshan wasn't sure if there was something in it, or if it was just the sound of the mortar hollow, but he would know if he opened it and checked.

Snapped!

The steel bar was knocked hard, and the tiles cracked. Liu Qingshan stepped forward to check it carefully. Behind the tiles was a cement wall.

His face darkened, Liu Qingshan looked at Chen Yan: "It's the mortar that's gone."

"It's okay, try another place."

Two people knocked on the top tile of the bathroom one by one, and found that after the 7 hollow bricks were broken open, there were cement walls inside, all of which were empty noises caused by the emptying of mortar, and there were no hidden spaces.

Ten minutes later, all the tiles had been knocked over, but still nothing was found.

Chen Yan frowned slightly at the moment: "Where else can you hide?"

The bathroom in the rental room is a squatting toilet. Chen Yan stood on the countertop of the squatting toilet and searched the entire bathroom again.

At this moment, Chen Yan has turned on the visual gene lock and carefully scanned every detail.

However, after five minutes, Chen Yan still had nothing to gain.

The tiled walls fit perfectly, and there is no possibility of any hidden compartments.

"Could it be that he didn't put Dong XZ here at all?"

"Or have things been destroyed?"

destroy?

not here?

Chen Yan shook his head: "Wu Degui is different from ordinary murderers. He is a serial murderer who committed five consecutive murders."

"The psychology of this kind of person is completely different from the psychology of ordinary people."

Chen Yan pointed to the discs under the coffee table: "Look at the discs there, there are new ones released this year, and there are old ones more than ten years ago."

"However, if you look at the order in which the discs are placed, some old discs are not at the bottom, and new discs are not at the top."

"And the disc played on the DV machine is also a previous TV series."

"Even some discs can be kept for more than ten years. Will Wu Degui destroy the things that once committed crimes?"

"As for finding another place to store..."

Chen Yan still shook his head.

"Wu Degui committed a serial murder case. The things he used, the plans he planned, and even the tools for committing crimes, he would definitely keep it by his side, and it would be a place he could see all the time."

Chen Yan walked out of the bathroom while talking, and looked around the whole living room.

"Just, where is this place?"

That is, where can it be hidden?

The whole room is so big, a living room, a bedroom and a bathroom.

Liu Qingshan also followed Chen Yan out of the bathroom, and followed Chen Yan's gaze to scan around.

Um?

Suddenly, Chen Yan paused slightly.

At this moment, Chen Yan was just in front of the sofa, facing the bathroom.

Where you can always see…

Chen Yan seemed to have captured some key information.

In the living room, the old sofa has a depression in the middle due to long-term use.

Chen Yan sat on it and could tell that this was where Wu Degui often sat.

Looking up, I saw that there was a TV in the corner on the left.

A more comfortable position to watch the TV from this angle is to lean on the sofa with your left hand on the edge of the sofa.

However, when Chen Yan

After sitting up straight, when looking up, the line of sight is facing the bathroom.

In simple rental rooms, most of the bathrooms are equipped with squatting toilets.

The installation of a squatting toilet is different from that of a toilet.

In fact, whether it is a squatting pan or a toilet, except for the top, the internal structure is somewhat similar.

There is an S-shaped elbow at the launch.

The S-shaped elbow of the toilet is inside the toilet. Because the toilet itself has a height of 40 cm to 50 cm, this elbow to prevent backflow can be accommodated inside the toilet.

However, the squat toilet does not work.

Due to its structure, the squatting pan must be at least 20 cm above the ground when it is installed.

The reason for this is to leave enough space for the elbow of the squatting pan.

Therefore, in terms of space, the squatting toilet is a waste of space, but the cost is cheap.

Chen Yan got up again and looked at the position of the sofa.

This sofa is relatively small and only has seating for two people. Generally speaking, the sofa will be placed in the middle of the living room, which is in line with the aesthetic thinking of most people.

However, the sofa in Wu Degui's house was placed a little to the left.

That is, near the window sill.

Wu Degui's room, after entering the door, is the bathroom behind, that is to say, the bathroom is close to the window sill.

What puzzled Chen Yan was, why didn't Wu Degui put the sofa in the middle?

But on the left, you can see the toilet when you look up.

This is not to the liking of ordinary people.

Generally speaking, staying away from the toilet is the right thing to do.

There is only one coffee table in Wu Degui's room and no dining table, which means that he should probably eat on the coffee table when he usually eats.

So Wu Degui looks up at the toilet as soon as he eats?

Isn't this a little weird?

Chen Yan was sitting on the sofa, staring at the toilet...

Visual Gene Lock is on!

Um?

Soon, Chen Yan discovered something was wrong.

A tile facing Chen Yan, the color of the edge is a little different from Zhou Wei.

It seems, smoother and more reflective!

Chen Yan immediately got up, bent down, squatted at the door of the toilet, picked up the steel bar at hand, and tapped lightly on the floor tile on the side of the high platform of the squatting toilet facing him.

dong dong dong!

The hollow voice is very clear.

Chen Yan changed direction and knocked on other floor tiles.

dong dong dong!

There was still a hollow voice.

Liu Qingshan naturally heard something wrong, with a surprised expression on his face: "It's empty underneath?!"

Gan!

Now that an exception is found, it is convenient to open it.

Chen Yan just gently pulled the edge of the floor tile that was facing him, and with a little force, the floor tile was removed in one piece.

"Flashlight!"

Taking the flashlight handed over by Liu Qingshan, Chen Yan lay on the ground and looked inside.

At the same time, some pungent **** smell came, and there was a familiar smell on Li Yansong.

Finally found!

Ten minutes later, everything in the high platform of the squatting toilet was taken out.

A gray-blue work uniform, light gray jeans, and a pair of white sneakers.

In addition, Chen Yan and Liu Qingshan also found a box of probes and a rubber tube that was several meters long.

In addition to these, there is a notebook.

Liu Qingshan picked up the white sneakers for the first time, and looked at the pattern below, which was exactly the same as the shoe print extracted on the spot in his memory: "It's this pair of shoes!"

Because each pair of shoes has different degrees of wear and tear, even if it is the same person, the shoe prints left by different periods of wear are unique.

Therefore, in principle, as long as there are these shoes, the evidence that Wu Degui killed Li Yansong is conclusive.

********************

While Liu Qingshan was sorting out the clothes Wu Degui wore when he killed, Chen Yan took the black leather notebook.

gravure "notebook" lettering on black skin

The corners have been yellowed, and the black cover has some wear and tear.

This style of notebook, in Chen Yan's memory, should be the product of ten or twenty years ago.

But judging by the degree to which the corners were rolled and the worn parts on it, it was evident that its owner was flipping through it a lot.

Opening the notebook, on the first title page is a nice hard pen font.

Prizes: Wu Degui was awarded the title of Difficulty Truck Transport Pacesetter, and he was rewarded with a notebook for encouragement.

The signing unit, Shenshi No.1 Transportation Company, signed in 2001.

This is…

Something from twenty years ago.

Background information on Wu Degui is under investigation, but there are no valuable clues.

At present, it is only known that Wu Degui's household registration is in the local area of ​​Shenshi City, but he has not found any real estate in his name.

There is no information about his marriage, and the information on the household registration is relatively simple.

And the people in this compound are not very familiar with Wu Degui, and they don't know anything about his past.

Shen City First Transportation Company…

It turned out that Wu Degui once worked in Shenshi No.1 Transportation Company.

The first transportation company was established for a long time, with a history of seven or eighty years, but 20 years ago, due to changes in the economic development model, it went bankrupt.

The company was transformed into Shenshi Public Transport Group Corporation.

"Master, wait for the Shen City Public Transportation Collective Company to check the archives of the Shen City No. 1 Transportation Company. Wu Degui once worked in this company."

"Let's see if we can find anything."

"it is good!"

Liu Qingshan agreed and arranged related work immediately.

Chen Yan continued to read the diary.

The first page.

On Monday, the weather was light rain.

"Lao Li said 1 yuan and 50 cents last month. He promised to give it to me today, but he didn't give it."

"How could I have lent him the money at that time? Old Li is famous for deductions. I probably won't be able to get the 1 yuan and 50 cents back."

"It really doesn't work, tell him about it, but everyone is a colleague, because it's not good to turn your face for 1 yuan and 50 cents."

"Forget it, I don't want the money, just puncture the rear tire of his bicycle."

On Wednesday, the weather was fine.

"I saw Qin Yu eating again at the entrance of the cafeteria at noon today."

"Qin Yu is really good-looking, but it's a pity that he flattered Zhang Huaiying."

"Don't you just flatter the leader? Become a director, otherwise he's nothing."

"Qin Yu entered the factory at the time, but I helped her carry the luggage. I had a chance, but..."

On Monday, the weather was cloudy.

"Qin Yu and Zhang Huaiying are divorced. I'm very happy. I think we can have a drink."

"Although Qin Yu became a widow, I don't despise her."

"And over the past few years, Qin Yu has become more and more beautiful and plump."

"Today I'm going to give her a card. I bought it from a department store. She should like it, right?"

After Wu Degui got this diary reward, Wu Degui would keep a diary every once in a while.

But there is no specific time record, only the day of the week and the weather.

Not only that, but he did not write a diary very often. After Chen Yan opened about 10 pages, it was already the last diary entry.

"Damn Zhang Huaiying, I was laid off!"

"I'm crippled for the sake of the factory, but you let me be laid off!"

"You kind of flattery, ****, no wonder Qin Yu divorced you and went with the factory manager, you deserve it!"

"Zhang Huaiying, you wait, sooner or later you will fall into my hands, and I must bleed your blood so that you will never be born again!"

Last diary, no day of the week, no weather.

Moreover, the handwriting is very scribbled, obviously written in fury.

After that, it's a blank page.

Chen Yan flipped through it at will, only to find that there were records on the back of the diary.

Chen Yan turned the diary upside down, opened it, and his eyes narrowed.

It turned out that Wu Degui's plan to kill the taxi driver was recorded behind the diary.

The first taxi driver victim: Zhang Huaiying!

The diary records every detail of Wu Degui's murder.

Including when and where to start, what to use to remove traces after the start, how to remove, how to check, and so on.

Very detailed.

After that, there are five similar murder plans.

The last plan, on the first page is the sketch of the Phoenix Street area.

A red line was drawn across the road in the area with a red pen.

There is also an arrow mark, this Liu Qingshan marked in the report that the route of Li Yansong's taxi after entering the area is very similar.

"Master, look at this."

Handing the notebook to Liu Qingshan, the latter looked at it, and his eyes lit up: "Now I see how he can deny it!"

With the pair of white sneakers, it can be determined that Wu Degui killed Li Yansong by comparing the shoe prints.

But what about former taxi drivers?

After so many years, how can I find the evidence?

And this diary confirmed that Wu Degui was the murderer of the serial murder case.

This involves a closed loop of evidence in case detection.

Whether it is the texture of clothes or shoes, it can prove that Wu Degui killed Li Yansong.

However, the evidence of the 4 serial murder cases 15 years ago has long been found, so if it is determined that Wu Degui is the serial murderer?

Judging by the modus operandi is not enough, and even if Wu Degui admits that he is the murderer of a serial murder, it is still not enough without evidence to support it.

And once there is no evidence, it cannot be strictly said that the serial murder case has been solved.

With this notebook and the above plan of Wu Degui's murder plan, this is called the completeness of the evidence.

trial room.

This time, Chen Yan and Wang Fenglei interrogated Wu Degui together.

Just now, all the evidence has been shown to Wang Fenglei.

Now, it can be said that the evidence is conclusive!

The clothes and shoes found under the high platform of the squatting toilet have been sent to the technical team for trace identification. Only the notebook was sealed in the evidence bag and placed on the interrogation table.

"Wu Degui, do you think we will never find what you hid?"

Clothes, shoes, notebooks, probes, rubber hoses and a bottle of ether spray.

This is all Wu Degui's tools for committing crimes.

At this moment, Wu Degui was shaking like a sieve.

His eyes stared at the black leather notebook on the table in horror.

The mouth seems to be murmuring unconsciously: "Impossible...impossible...how can you find it?"

"Wu Degui!"

Wang Fenglei roared angrily, causing Wu Degui to shudder: "Tell me, why did you kill five taxi drivers?"

"Zhang Huaiying asked you to be laid off. You can say that you killed him to get revenge on him, but what about the other four?"

"Why did you kill them!"

Wu Degui's information at the time has also been investigated clearly.

At that time, Wu Degui worked very actively in Shenshi No. 1 Transportation Company, and basically he was able to get advanced every year.

But at the age of 23, because of repairing a vehicle, his left foot was smashed by the engine, leaving him disabled.

In addition, this person was dull and introverted, and he never found a daughter-in-law until he was laid off eighteen years ago.

And Zhang Huaiying lost his public office 15 years ago because of corruption and bribery, and drove a taxi in the society.

After Wu Degui found out, he planned to kill Zhang Huaiying.

This is the first serial murder of a taxi driver fifteen years ago.