Chapter 253 Reasoning Analysis and Autopsy

Standing in the yard, Chen Yan held a blueprint in his hand.

Floor plan of the Panshui Town Detective Team.

The fire started from the duty room and burned all night.

The duty detective Zhang Yulin died, and the only suspect of theft who surrendered himself, Jin Nansheng, disappeared.

The surveillance in the detective team was damaged, so no one knew what happened that night.

First, if this was a pure accident, then there are several questions.

How did Jin Nansheng disappear?

The Panshui Town Detective Team’s station is a row of bungalows.

There is only one exit at the main entrance.

The duty room is next to the main door.

The confinement room where Jin Nansheng was imprisoned is the innermost room.

To get out of the confinement room, you have to pass through three offices, an evidence room, and a gun room.

Then comes the duty room.

The fire started from the duty room, which can be said to have blocked the people inside from coming out at the first time.

Second, why did Zhang Yulin not show any signs of struggle when he died.

Chen Yan has just read the autopsy report.

There were no obvious external injuries on Zhang Yulin's body, no signs of mechanical asphyxiation leading to death, and then the body was destroyed in the fire.

According to the autopsy report, Zhang Yulin died of smoke asphyxiation.

However, this is not in line with common sense.

Zhang Yulin did not drink alcohol that day, and no drug components were detected in his body.

So, even if he was not awakened at the first moment of the fire, what happened afterwards?

Suffocation caused by smoke would definitely wake Zhang Yulin up.

And as long as Zhang Yulin woke up, he would definitely escape.

Even if he could not escape at that time, there would be some signs of struggle, right?

At least, he would not lie in bed, covered with a summer quilt and wait to die.

Third, the electric kettle that caused the fire.

Chen Yan just asked someone to bring an identical electric kettle.

This electric kettle is semi-automatic.

After setting the water temperature, turn on the switch for the electric kettle to work.

When the hot water inside is heated to the set temperature, the electric kettle will automatically cut off the power, but the switch is not disconnected.

"When the water inside is 10 degrees Celsius lower than the set temperature, the electric kettle will restart to heat."

The internal detective in charge of purchasing the electric kettle function was introducing it to Chen Yan.

"What will happen if the water boils dry?"

"There is a sensor in the kettle. When the water boils dry, it will automatically cut off the power and will not restart."

According to the purchasing staff, the sales volume of this electric kettle is very large.

I haven't heard of any safety and quality hazards.

Because the electric kettle caused the circuit to catch fire, thus causing the fire...

This possibility is not great.

However, the kettle had long been burned to slag, and there was no way to do a technical appraisal.

From the point of fire, the conclusion given by the fire department was that the electric kettle short-circuited and caused an electrical fire.

Huh...

He exhaled a long breath of turbid air.

Chen Yan and Wang Min left the fire scene.

"Brother Wang, what do you infer about this case?"

Inference?

In the car, Wang Min frowned slightly: "Based on the situation at the crime scene, there are two inferences."

"The first is what we see now."

"Jin Nansheng somehow opened the door lock and escaped from the detective team."

"Afterwards, a fire broke out accidentally, destroying all the evidence."

"Of course, this inference is only the result of what the naked eye sees, and there are many problems in it."

"For example, why did Jin Nansheng run away? He originally surrendered himself."

"From the situation that day, Jin Nansheng deliberately found trouble and hid in the Panshui Detective Team."

"Since he deliberately hid in, why did he run away at night?"

"For example, when Zhang Yulin died, there was no sign of struggle, which is even more wrong..."

Listening to Wang Min's analysis, Chen Yan also nodded.

Wang Min was right, these questions were also Chen Yan's doubts.

"Brother Wang, what about the other inference?"

"Another inference..."

Wang Min looked out the window, his eyes narrowed slightly: "That is a carefully planned vicious case."

"Jin Nansheng deliberately entered the Panshui Town Detective Team, there must be a reason."

"For example, to avoid some enemies."

"But the other party did not give up after Jin Nansheng entered the detective team."

"At night, after kidnapping Jin Nansheng, they planned this accidental fire, killed Zhang Yulin, and destroyed all evidence."

"Not only that, after Lin Gang arrived, he should have investigated some key clues."

"So, they planned the accidental traffic accident again."

After listening to Chen Yan...

He nodded heavily.

Wang Min's inference and Chen Yan's inference are basically the same.

The electric kettle caused a fire, not so much an accident as it was to destroy the body.

And Lin Gang's car accident.

The illusion of the accident has been seen through by Chen Yan.

The other party carefully planned the traffic accident by tampering with the traffic light control box.

The core figure in the case, Jin Nansheng, died on the spot.

Lin Gang, who discovered a major clue, was seriously injured and unconscious.

"Brother Lin went to Leigong Mountain that day, probably to meet Jin Nansheng."

"But the other party had planned it and staged the car accident on the way."

"Brother Wang..." Chen Yan thought for a while and looked at Wang Min: "I have a request."

"Hmm?"

"What request, tell me."

"I want to re-examine Zhang Yulin and Jin Nansheng!"

Re-examine?

Wang Min was slightly stunned, and looked at Chen Yan with surprise: "You kid also know autopsy?"

Autopsy is not something that can be done by just going up and pinching it or taking a look.

This is a specialized subject.

It requires a lot of experience.

Sometimes, experience is even more important than technology.

Wang Min has read Chen Yan's resume countless times.

In fact, someone from the headquarters went to the police academy to investigate Chen Yan's performance during his time in the police academy.

Otherwise, do you think it is so easy to get a letter of appointment from the Chinese Detective Corps.

Is it so easy to be a reserve member of the team leader of the nine major detective teams?

However, I haven't heard that this kid has studied autopsy in the police academy.

As soon as he saw Wang Min's expression, Chen Yan knew what Wang Min was thinking: "I learned something in Liancheng."

"The situation when Zhang Yulin died was very wrong."

"I want to take a look myself, maybe I can learn something."

"Of course, there is no problem with this."

Although Wang Min was surprised, he did not raise any objections.

The detective assigned to Zhang Yulin's autopsy by the Yunnan Provincial Detective Brigade was a big shot here.

However, Wang Min was extremely impressed by Chen Yan's meticulous observation.

Let's not talk about anything else, that is, the discovery in the traffic light control box this morning.

Wang Min personally inspected the control box.

Every detail, every switch, every screw or button.

How could an old detective like Wang Min make such a low-level mistake.

However, Wang Min really did not find the traces of the fuse button on the fuse box being tampered.

But Chen Yan could find it.

Afterwards, someone from the Yuecheng Detective Team found a magnifying glass and carefully observed and studied it more than a dozen times before discovering that the problematic fuse button had a gloss and fine dust attached on it, which was indeed different from other fuse buttons.

For a time, the members of the Yuecheng Detective Team and the Serious Crime Squad of the Yun Province Detective Team were shocked by Chen Yan.

Especially the members of the Serious Crime Squad, two of them were originally employed by the Kun City Detective Team.

The last time Chen Yan investigated a strange suicide case in Kun City, I followed Chen Yan to investigate the case.

At 2 pm, Chen Yan and Wang Min came to the Yuecheng Funeral Home.

"Comrade Zhang Yulin's body is stored in refrigerator No. 3."

"Jin Nansheng's body is stored in refrigerator No. 7."

The case was not investigated, so the body was naturally not cremated.

Opening the freezer, the cold air hit me.

Opening the body bag, Zhang Yulin's body, which had been dissected and re-stitched, appeared in front of Chen Yan and Wang Min.

The body was charred, and it was now unrecognizable because of the burning of the fire.

On the chest, the Y-shaped autopsy incision had been sutured.

There are very strict procedures for autopsy.

There are rules for where to cut, what kind of incision to make, and what kind of thread to use for suturing.

The autopsy skill specialization awarded to Chen Yan by the system has a detailed introduction to all of these.

Chen Yan knew at a glance that the person who performed the autopsy on Zhang Yulin was a master.

No other reason, the incision was sutured.

The incision for the autopsy is generally made from the clavicle on both sides, to the back of the sternum, and downward.

After that, follow-up operations are carried out.

For example, pathological analysis, pharmacological analysis, and even toxicological analysis of the internal organs, etc.

And when suturing, it is also very particular.

Because the skin of the corpse is fragile and inelastic.

Therefore, the sutures used for suturing corpse inspections are different from ordinary medical sutures.

Judging from the sutures of Zhang Yulin's autopsy wounds, the detective in charge of the autopsy was very careful.

The distance of each stitch is the same, and the strength is very well controlled.

Not only did the incision suture, but it also did not cause secondary damage to the skin.

Even though Zhang Yulin's body had been damaged by the fire, Chen Yan could see from the details that the detective in charge of the autopsy not only cherished Zhang Yulin's body very much.

The technology was also extremely superb.

On the other hand, the body of Jin Nansheng taken out of the No. 7 freezer, judging from the stitches alone, was not made by one person.

The stitches were uneven in width and strength...

A novice.

Because of the freezing preservation, Chen Yan could not directly perform an autopsy.

However, autopsy is only one of the methods of autopsy.

It is usually used to determine the cause of death and verify whether the deceased was poisoned.

On this point, Chen Yan believed in the original autopsy report.

However, even without autopsy, many discoveries can be made through external inspection.

For example, some autopsy methods recorded in "Xiyuan Jilu".

It is just like seeing a doctor with traditional Chinese medicine.

Corpses, to a certain extent, can also speak.

Chen Yan put on gloves and began to observe carefully.

It is consistent with the conclusion of the autopsy report.

There is fiber char on Zhang Yulin's body, which is the residual material after the summer cool quilt he covered was burned.

Turning on the visual gene lock, Chen Yan scanned Zhang Yulin's body inch by inch.

On his hand, he also gently touched the surface of the body.

The face was damaged...

There were smoke particles in the mouth...

There were no scars on the back of the head...

There were no signs of broken neck...

The body was placed on its side, and Chen Yan began to observe the back of the body.

Because Zhang Yulin was lying flat on the bed when he died.

His back was against the bed board, so it was not burned by the fire.

Hmm?

Chen Yan was slightly startled. A tiny black dot that was almost invisible to the naked eye attracted Chen Yan's attention.

"What is this...?"