novelraw Chapter 385: 3 pieces of DNA information
Chapter 385: 3 pieces of DNA information
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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 him according to Wang Yiming's meaning.
Very strong.
But the legs didn't budge.
Afterwards, Wang Yiming moved the soft collapse around and turned the other stool leg upwards.
Captain Wu, try again!
Wu Zhiguo subconsciously increased his strength this time.
However……
Click!
There was a crisp sound, and the imagined obstacle did not exist, and the legs of the stool cracked in response!
this……
Wu Zhiguo raised his leg and looked, why is it so easy this time?
Chen Yan's eyes lit up.
Crouching down, Chen Yan immediately activated the visual gene lock.
The broken stubble of the stool legs is uneven, which is completely in line with the situation that the external force damages and causes the solid wood to break.
Moreover, the material is pagoda wood, which can be seen from the texture of the wood.
However, why did Wu Zhiguo step down just now, but the legs of the stool did not move at all.
Now this kick, but the stool leg broke without any resistance?
Chen Yan observed and analyzed carefully, and the knowledge about trace identification quickly swept through his mind.
Obviously, the reason for this situation is definitely not that Wu Zhiguo's strength has become stronger.
Rather, there is a difference between the leg that Wang Yiming asked Wu Zhiguo to kick this time, and the leg that Wu Zhiguo kicked just now!
They are all locust trees, why is there a difference?
brush!
A stream of light flashed in front of Chen Yan's eyes.
Under what conditions do wood fibers become brittle?
Yes, and only one case.
That is carbonation.
Wood becomes brittle only after it is burned.
Carbonized wood can be crushed with one foot.
However, the appearance of this stool leg has not changed much, and the broken stubble is also a yellow wood color, not black after carbonization.
Why?
The olfactory gene lock is on!
boom!
A faint, almost inaudible charcoal smell looms.
At the same time, with the combination of the visual gene lock and the ability to freeze the frame, the broken part of the stool leg is rapidly enlarged in front of Chen Yan's eyes.
The yellow wood fiber has actually changed.
In the middle, there are many black carbon particles.
Moreover, the fibers that should have been continuous and tight have all broken.
Broken fibers, black carbon particles, plus a faint smell of charcoal...
Chen Yan finally understood why.
Grill!
Standing up, Chen Yan looked at the broken stool leg: This stool leg has been scorched by high temperature!
Gah?
Wu Zhiguo didn't understand why, but Wang Yiming's mouth opened wide, almost dislocated.
I spent a long time on myself, did dozens of experiments, and checked several documents before I figured it out. This vice-captain Chen just squatted down and took a look to figure it out?
Just kidding me!
Wu Zhiguo saw Wang Yiming's surprise.
This Wang Yiming is usually not very talkative, and his mind is a little dull.
However, in terms of professionalism, Wu Zhiguo admires it.
Wang Yiming's trace identification method is definitely at the top level in the Liancheng detective team.
Last year, he won the second place in the skill competition of trace identification detectives held by the Liao Provincial Criminal Police Brigade.
Definitely an expert level figure.
Chen... Vice Captain...
Wang Yiming is a little awkward to speak now: How did you find out?
Team Wu told you?
impossible!
I just researched and understood it, and I haven't told Team Wu yet.
Chen Yan smiled, he couldn't say anything, don't be surprised, I'll hang up.
I also happened to read a document before.
After the wood is burned and carbonized, the wood fiber is completely destroyed, it will turn into coke, and the material will become fragile.
However, if the wood is baked 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 no chemical reaction occurs.
Its color and shape will not change.
But the strength gets weaker, and the durability gets weaker.
Wang Yiming opened his mouth and remained silent for a long while.
Finally, with a long sigh, he looked at Chen Yan, as if looking at a monster.
Deputy Captain Chen is right.
We have carried out a detailed inspection of all the collapses at the crime scene.
It was found that one of the five soft stool legs was relatively fragile.
After reviewing the literature, I found that the high-temperature roasting of solid wood can make the solid wood fragile without destroying the properties of the solid wood.
There is only one slump, and the strength of each stool leg is the same, but this slump is at the scene of the crime, the place farthest from the metal frame.
Wang Yiming's meaning is very clear.
Six collapsed, and five were tampered with.
Only the one farthest away, perhaps because the murderer didn't have time, the latter thought the distance was too far away, and Zhao Guangming would never move that one, so he didn't do anything.
But the fact is that the slum under Zhao Guangming's feet was indeed the one closest to the metal frame on which he was suspended.
wait……
Wu Zhiguo was still a little confused: I don't quite understand one thing.
After being baked at high temperature, why does the color of the appearance of the stool legs not change?
Wu Zhiguo's doubts are justified.
The outside of the stool legs is painted, 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 is easy to be found.
After all, the ignition point of paint is definitely lower than that of solid wood.
I was skeptical about this at first, but...
Wang Yiming picked up a piece of aluminum foil on the table.
Wrap it in this thing, so it won't hurt the paint!
...
Leave the trace identification room.
Chen Yan frowned.
It looks seamless to hands and feet made on the stool leg.
However, after all, the height of the devil is one foot, and the height of the Tao is one foot.
Roasting solid wood at high temperature will eventually lead to damage of wood fibers, which cannot be done in a short time.
Otherwise, once the temperature is too high, the solid wood will be charred.
This is a slow and meticulous project.
Therefore, based on this point, it can be judged that the murderer must have been planning and preparing for a long time to plan this accidental death.
So here comes the problem.
Who can often touch the softness in the locker room?
Certainly not 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 passenger flow.
People come and go during business hours, and the murderer cannot have the opportunity to burn the slack stool legs in the dressing room.
Therefore, it is only possible when you are off work.
Picking up the phone, Chen Yan called Wang Gang.
Look up, in the last one or two months, who are the people who often go in and out of the gym during off-duty.
So far, the investigation of the case can be said to have made a huge breakthrough.
Through the traces of man-made operation on the broken stool legs, it can be clearly judged that Zhao Guangming's death was a deliberate murder.
The next step is to find this person through this clue.
...
The first good news was the extraction of DNA information on the scene.
We extracted the fingerprint information of two people and the DNA information of three people at the scene.
Wu Zhiguo handed over the relevant report to Chen Yan.
Chen Yan had expected the fingerprint information of the two people.
According to the situation at the scene, Zhao Guangming's limbs and head were suspended on a metal frame.
Directly in front is a floor-to-ceiling mirror.
In the middle, is a gantry metal frame with two metal rings and two red ropes on it.
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 way, the fingerprints and DNA information on the scene should only belong to two people.
One should belong to Zhao Guangming.
The other is the woman with metal plus.
However, why there are two fingerprints.
There are three copies of DNA information?
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