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Fang Ze smiled slightly, nodded and said, "That's right, but mechanical death is certain."

"In addition to observing the expression of the deceased, the file contains a detailed autopsy report."

"The forensic doctor performed a craniotomy on Diao Aixin and found that there were large bleeding spots on the meninges, as well as internal organs."

"There is only one possibility. Diao Aixin died of suffocation."

After listening to Fang Ze's words, Luo Bixin suddenly said: "I was strangled to death when I was unconscious."

"Ok"

Fang Ze looked at Luo Bixin in surprise, and said, "You can still think of this?"

Luo Bixin pouted and said, "What's wrong, I'm the captain of the dignified criminal police team."

The way the other party tried to prove himself made Fang Ze laugh.

He said, "That's right, if you're unconscious, you can indeed strangle him."

"But there is a premise, that is, deep sleep is necessary."

Luo Bixin was thoughtful and said: "A lot of sleeping pills"

Fang Ze nodded: "If you want to forcibly strangle the deceased while he is sleeping soundly, without violent reaction, you need a very large amount of sleeping pills."

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"Less talk, it takes thirty or forty pieces."

"Thirty and forty, what's the concept of filming"

"That can no longer be called sleep, and suspended animation is not an exaggeration."

Luo Bixin smiled: "In the stomach of the deceased, no sleeping pills were found, or only a small amount."

"that's right."

Fang Ze gave a thumbs up to Luo's refill.

Luo Bixin took a light breath and said, "That's not strangulation."

"After Diao Aixin's death, the murderer was afraid that the other party was not dead, so he used the rope again to carry out the second strangulation."

Fang Ze smiled and said, "It's absolutely correct."

Luo Bixin was not happy about it, and frowned: "Then how did Diao Aixin die?"

"Fang Ze, tell me all the causes of death from mechanical asphyxiation."

Fang Ze said: "Mechanical suffocation death generally includes hanging, strangulation, strangulation, drowning, suffocation, blockage, compression of the chest cavity to death, or foreign objects entering the respiratory tract, sexual asphyxia, etc."

After hearing this sentence, Luo Bixin pondered for a while and asked, "Does the deceased have emphysema?"

"No."

Fang Ze shook his head.

"That's not drowning"

Luo refills to himself.

Hanging will not happen, only suicide can happen.

Strangulation has been ruled out.

There are no palm marks on the strangled neck, ruled out.

"Is the airway blocked?"

Luo Bixin asked.

"No."

"Then rule out blocking."

"Where's the chest cavity?"

Fang Ze smiled and said: "There is no trace of external force breaking."

Luo Bixin nodded: "The compression of the chest cavity is ruled out."

As for sexual asphyxiation, the possibility is even lower.

Only if both parties are willing, and the body is healthy and in a semi-suffocating state will it happen.

That way, it won't be broken into pieces.

Then, there is only one possibility left.

Luo Bixin turned his head and said, "Suffocate to death"

Fang Ze said: "Continue, what is the method?"

Luo Bixin pursed his lips and said, "Towels, pillows, bedding, everything is possible."

After reasoning to this point, Luo Bixin shook his head helplessly, and said: "I can't think of it, what kind of suffocation did I use to get to 87?"

Fang Ze picked up the photo in Luo Bixin's hand, and said: "The autopsy results of the dossier are here, and the conclusion is suffocation."

"As for how he died of suffocation, the Yangcheng police at that time did not give an answer, but I have already thought of it."

Luo Bixin asked curiously: "What is it?"

Fang Ze pointed to the photo and said, "The mechanism of suffocation is that the mouth and nose are blocked, which prevents the exchange of oxygen inside and outside the human body, resulting in death due to suffocation and hypoxia."

"Generally speaking, death by suffocation takes a long time."

"You often go online, you should know that there are many strange people in the world who can hold their breath for a long time."

Luo Bixin nodded and said, "I know, the Guinness World Record is 22 minutes and 22 seconds."

It is really difficult to not breathe for such a long time.

But in this world, there is always a shortage of talented people.

Fang Ze said: "That's right, if we want to suffocate a person through foreign objects, our first reaction is that it will take a long time."

"But the longer the time, the more likely it is that the victim will wake up, almost 100% will wake up."

"Once the victim wakes up and struggles hard, the expression of death will not be what it is now."

Luo's refill is a bit foggy.

"Why can't I understand?"

"Is it suffocating?"

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Chapter 237 The deduced killing process [1]

Fang Ze said: "Don't worry, listen to me tell you slowly."

"If it's a towel, a pillow, or a bedding, you'll find that these murder weapons all have one thing in common."

"common ground"

Luo Bixin was puzzled.

Is it possible that there is no common ground? They are all fabric products. Fang Ze looked at Luo's pen core and smiled lightly: "The so-called common ground must be from the perspective of forensics."

"These things, at the forensic level, are soft objects."

"What are soft objects that can change shape and have poor air permeability?"

"Generally speaking, suffocation caused by soft objects compressing the mouth and nose will leave a very obvious pale area near the mouth and nose."

"These pale areas are irreversible and very difficult to recover."

"Even after secondary processing, we can still find clues."

"But it's not in the picture."

"In addition, although these soft objects such as towels and clothes have poor air permeability, they can still breathe."

"So, if the murderer wants to use these things to kill people, he must use a lot of force to press the nose and mouth of the deceased."

"At least, there will be scrapes."

"If it is serious, it will cause the nose to be crooked or flattened, and even the bridge of the nose may be broken."

"There will be bruises and lacerations, including the lips, gums and tongue."

"There have been cases before where the murderer suffocated a person with a towel, causing the deceased's teeth to loosen and fall out."

After listening to Fang Ze's words carefully, Luo Bixin felt that he had gained a lot of knowledge.

She quickly snatched the photo from Fang Ze and looked at it again.

There were no traces of those symptoms.

"It's not suffocation caused by soft objects!"

"what would that be"

Fang Ze said: "I haven't finished talking yet, the second new question."

"That's choking time."

"As I said just now, if the suffocation lasts too long, the deceased will definitely wake up suddenly in sleep."

"At that time, the appearance of the deceased will be more exaggerated and terrifying. These facts do not match."

"So, the suffocation time of the deceased should be relatively short, no more than one minute, between thirty and fifty seconds."

Luo Bixin was stunned for a moment, and said, "No more than a minute."

"No way"

"The average person can hold their breath for more than one minute."

"Even if people with low lung capacity will feel uncomfortable, it will not cause death. At most, lack of oxygen will cause dizziness."

Fang Ze smiled and said, "There's a term in forensic science, it's called total asphyxiation."

"Total suffocation"

"right."

Fang Ze nodded, "In humans, if a space-free general suffocation is applied, it can cause suffocation to death in the shortest possible time."

"And, the expression will not be too much."

"Because when the dead just woke up, they died."

Luo Bixin seems to be listening to a story.

After understanding Fang Ze's meaning, Luo Bixin took a deep breath, "The murderer, how did he create a completely suffocating environment?"

"Is it a high-tech vacuum space"

"No no no."

Fang Ze waved his hand and said with a smile: "It's not that complicated, it's actually very simple, you only need one thing to make it happen."

"what"

"Plastic sheeting."

"

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Plastic sheeting! It’s as simple as that”

"That's right."

Fang Ze nodded with a smile, and said, "Plastic sheeting, plastic wrap, whatever."

"When the deceased was in a coma, the murderer covered her head with a plastic sheet or plastic wrap and sealed it."

"When the deceased just woke up due to massive hypoxia, he was already dead."

"This is also the reason why the deceased died of suffocation, but his face was not exaggerated."

Luo Bixin stared blankly at the photo in his hand.