Chapter 386 Three DNA Information (More Will Be Added Tomorrow, Please Vote!)

Speaking of this, Wang Yiming's expression was slightly excited.

"Captain Wu, kick this stool leg."

Although Wu Zhiguo didn't understand what Wang Yiming meant, he still kicked it according to Wang Yiming's instructions.

The force was very strong.

But the stool leg didn't move at all.

After that, Wang Yiming moved the soft stool around and turned the other stool leg upward.

"Captain Wu, try again!"

Wu Zhiguo subconsciously increased his strength this time.

However...

Crack!

With a crisp sound, the imagined obstacle did not exist, and the stool leg actually cracked!

"This..."

Wu Zhiguo raised his leg and looked at it. Why is it so easy this time?

Chen Yan's eyes also lit up.

Squatting down, Chen Yan immediately opened the visual gene lock.

The broken part of the stool leg was uneven, which was completely consistent with the situation where the solid wood was broken due to external force damage.

Moreover, the material is locust wood, which can be seen from the texture of the wood.

But why did Wu Zhiguo kick it just now, and the stool leg didn't move at all?

Now, this kick broke the stool leg without any resistance?

Chen Yan observed and analyzed carefully, and the knowledge about trace identification in his mind quickly swept through.

Obviously, the reason for this situation is definitely not that Wu Zhiguo's strength has increased.

Rather, there is a difference between the stool leg that Wang Yiming asked Wu Zhiguo to kick this time and the stool leg that he asked Wu Zhiguo to kick just now!

They are both locust wood, why is there a difference?

Swish!

A stream of light flashed before Chen Yan's eyes.

Under what circumstances will wood fiber become fragile?

There is, and there is only one situation.

That is carbonization.

Wood will only become fragile after burning.

Carbonized wood can be crushed with one foot.

However, the appearance of this stool leg has not changed much, and the broken part is also yellow wood color, not black after carbonization.

Why?

The olfactory gene lock is turned on!

Boom!

A faint, almost inaudible smell of carbon is looming.

At the same time, the visual gene lock cooperates with the ability to freeze the picture, and the broken part of the stool leg is rapidly enlarged in front of Chen Yan's eyes.

The yellow wood fiber actually changed.

There are many black carbon particles in the middle.

Moreover, the fibers that should have been continuous and tight have broken.

Broken fibers, black carbon particles, plus a faint smell of carbon...

Chen Yan finally understood why.

"Roasted!"

Standing up, Chen Yan looked at the broken stool leg: "This stool leg has been roasted at high temperature!"

"Huh?"

Wu Zhiguo didn't understand what he heard, but Wang Yiming's mouth was so wide open that he almost dislocated his joint.

I spent a lot of time and effort, did dozens of experiments, and checked several documents to figure it out, but this deputy captain Chen squatted down and took a look and figured it out?

Are you kidding me!

Wu Zhiguo saw Wang Yiming's surprise.

This Wang Yiming doesn't like to talk much and his brain is a bit dull.

However, when it comes to professionalism, Wu Zhiguo admires him.

Wang Yiming's trace identification method is definitely at the master level in the Liancheng Detective Team.

Last year, he won the second place in the skill competition of trace identification detectives held by the Liaoning Provincial Detective Brigade.

He is definitely an expert.

"Chen... Deputy Captain..."

Wang Yiming is not speaking clearly now: "How did you find out?"

"Captain Wu told you?"

"Impossible!"

"I just figured it out and haven't told Captain Wu yet."

Chen Yan smiled. He couldn't say, don't be surprised, I'm cheating.

"I also read a document by chance before."

"After the wood is burned and carbonized, the wood fiber is completely destroyed and will become charcoal, and the material will become fragile."

"However, if the wood is roasted for a long time, as long as it does not reach the ignition point, the wood fiber cannot be burned and carbonized, but its internal structure will also be damaged to a certain extent, but there is no chemical reaction, and its color and properties will not change."

"But the strength will be weakened, and the durability will also be weakened."

Wang Yiming opened his mouth and didn't say anything for a long time.

Finally, he sighed and looked at Chen Yan as if he was looking at a monster.

"Deputy Captain Chen is right."

"We have conducted a detailed inspection of all the soft stools at the crime scene."

"We found that one of the legs of the five soft stools was relatively fragile."

"After consulting the literature, we found that by roasting at high temperatures under the burning point of solid wood, solid wood can be made fragile without destroying its properties."

"There is only one soft stool, and the strength of each stool leg is the same, but this soft stool is placed at the crime scene, farthest from the metal frame."

Wang Yiming's meaning is very clear.

Five of the six soft stools were tampered with.

Only the farthest one was not tampered with, perhaps because the murderer did not have time, and the latter thought that the distance was too far, and Zhao Guangming would not move the soft stool at all.

The fact is that the soft stool under Zhao Guangming's feet is indeed the soft stool closest to the metal frame where he is hung.

"Wait..."

Wu Zhiguo was still a little confused: "There is one thing I don't quite understand."

"Why didn't the color of the stool legs change after high temperature roasting?"

Wu Zhiguo's doubts are reasonable.

The stool legs are painted on the outside, and the inside is solid wood.

If it is baked at high temperature, the color of the paint should change, right?

In this way, it will be easily discovered.

After all, the ignition point of paint is definitely lower than that of solid wood.

"I was also confused about this at first, but..."

Wang Yiming picked up a piece of aluminum foil on the table.

"Wrap it with this thing, and it won't damage the paint!"

...

Leave the trace identification room.

Chen Yan frowned.

Although the tricks on the stool legs seemed flawless.

However, after all, the devil is one foot high and the road is ten feet higher.

High temperature roasting solid wood will eventually cause damage to wood fibers, which cannot be done in a short time.

Otherwise, once the temperature is too high, the solid wood will be carbonized.

This is a slow and meticulous project.

Therefore, from this point, it can be judged that the murderer planned this accidental death and must have planned and prepared for a long time.

Then the question is.

Who can often touch the soft couch in the locker room?

It is definitely impossible during working hours.

The Youman Gym where the case occurred is the headquarters of the Liancheng Youman Gym chain store, with the best location and the largest customer flow.

During business hours, people come and go, and the murderer has no chance to burn the soft legs of the benches in the locker room.

Therefore, it is only possible after get off work.

Picking up the phone, Chen Yan called Wang Gang.

"Check who has been in and out of the gym during off-get off work hours in the past one or two months."

So far, the investigation of the case can be said to have made a huge breakthrough.

Through the traces of human manipulation of the broken bench legs, it can be clearly judged that Zhao Guangming's death was a deliberate murder.

Next, it is necessary to find this person through this clue.

...

The first good news was the extraction of DNA information at the scene.

"We extracted the fingerprint information of two people at the scene, and the DNA information of three people."

Wu Zhiguo handed the relevant report to Chen Yan.

Chen Yan had expected the fingerprint information of two people.

According to the situation at the scene, Zhao Guangming's limbs and head were hanging on the metal frame.

In front of him was a floor-to-ceiling mirror.

In the middle was a gantry metal frame with two metal rings and two red ropes.

Obviously, Zhao Guangming was playing some exciting programs in the air at that time.

Therefore, the metal ring on the gantry must have fingerprints and DNA information.

However, in this case, the fingerprints and DNA information at the scene should only belong to two people.

One should be Zhao Guangming's.

The other is the woman added by the metal.

But why are there two fingerprints?

And three DNA information?