Yan Zhongxin chuckled lightly and said, "Komatsu is very careful. Lao Wei just checked it, and also focused on these few carbon ashes, presumably the traces left by the barbecue grill being brought down, and the charcoal sliding down hit the glass door and bounced back.

Therefore, Komatsu's speculation just now was not wrong, at the time of the crime, not only was the window closed, but also the door was closed. ”

Qi Yuan's eyebrows twisted, and he lowered his voice and said: "But the colleague from the police station who rushed to the scene first asked her, and she said that the door was open and had never been closed - we have a recording." ”

Su Ping snorted and nodded slightly, but didn't say anything.

After a while, Su Ping asked again, "Are there any other discoveries?" ”

"Not yet." Yan Zhongxin shook his head and said: "The time of death has been about an hour now, very close, the cause of death is likely to be hypoxic asphyxiation, more specifically, it is likely to be carbon dioxide poisoning, and there are no other valuable discoveries for the time being." ”

After a pause, he added: "In addition, the middle-aged male corpse, the one whose clothes were burned by coals, I carefully examined the body surface, analyzed the life reaction of the body surface burns, and also came to a conclusion - the deceased was in a coma and the process of death was quite rapid, I am afraid it was only a few minutes.

It can be seen that if the victim died as a result of carbon dioxide poisoning, the concentration of carbon dioxide in the balcony must have been extremely high at the time of the coma.

It's just that carbon dioxide is a gas after all, and after Zhou Jia opened the doors and windows to ventilate, it soon all overflowed into the atmosphere. ”

Qi Yuan thought thoughtfully: "The high concentration of carbon dioxide is easy to make people coma instantly, I'm afraid that it is easy to have an accident the moment Zhou Jia comes in, right?" ”

"You can hold your breath." "The mechanism of carbon dioxide causing coma and death lies in the rapid decrease of blood pH value after high concentrations of carbon dioxide enter the blood, which in turn causes the respiratory center to be anesthetized, causing reflex respiratory arrest, resulting in rapid coma and death," said Yan Zhongxin. ”

After a pause, Yan Zhongxin continued: "Therefore, you only need to breathe and avoid inhaling a large amount of carbon dioxide gas, which can prevent the blood PH value from plummeting, and the respiratory center will not be inhibited."

Therefore, Zhou Jia only needs to take a deep breath, hold her breath, open the balcony door, rush into the balcony, close the door and quickly open the windows, and then leave immediately, close the balcony door, and retreat farther away, so that she can avoid respiratory depression.

This process only takes about ten seconds, which is very fast, and it is completely possible for normal people to hold their breath for this little time. ”

Su Ping frowned and said, "You are assuming that Zhou Jia is the perpetrator of this case." ”

"Not really." Yan Zhongxin raised his eyebrows and said: "If it weren't for the premonition that the carbon dioxide concentration in it was extremely high, I wouldn't be able to breathe in less than two seconds after opening the door." And this kind of respiratory depression is unaware that most people are unconscious, even after opening the doors and windows for ventilation, due to the breath-holding, she will soon fall into a hypoxic coma or even die directly.

It is important to know that for patients with acute carbon dioxide poisoning, after getting out of the environment with high concentrations of carbon dioxide, they often need to add pressurized oxygen supply and remove carbon dioxide to correct the blood PH concentration and then relieve respiratory depression for effective treatment, among which the most commonly used methods are artificial respiration and cardiopulmonary resuscitation. ”

Qi Yuan raised his eyebrows.

Mouth-to-mouth resuscitation?

Then he was in Pingkuan before......

WOC His first kiss is gone?

No, why add another one?

was taken away by the little brother of the armed police early in the morning......

I don't know if it was a man or a woman who gave him artificial respiration at the beginning, but I remember that the bandits behind him at that time were a man and a woman, maybe ......

Tsk, this kind of thing must be for men, right?

He couldn't help but roll his eyes and raised his hand to touch his lips.

"Tsk," Su Ping glanced at him, and couldn't help but complain: "It's been so long, and you still can't help but reminisce?" ”

"Back to ......!" Qi Yuan was almost choked, but he was powerless to complain.

Su Ping obviously guessed that Qi Yuan had just thought of Shenma in a short period of time, and he was also extremely frightened.

Brother Song couldn't help but chuckle twice, then shook his head and said, "Let's get down to business." Speaking of which, if it is really as Director Yan said, the possibility of this Zhou Jia committing a crime is really not small. ”

"It's not that there are no excuses to shirk." Su Ping pursed her lips: "She wants to excuse herself by saying that she guessed that it might be carbon monoxide poisoning, because it is an indoor barbecue, and she covers her mouth and nose and opens the window to ventilate in order to prevent herself from being poisoned and fainting, which can also be explained." ”

"But," Song Ge continued, "since she could guess that it was carbon monoxide poisoning, that is, she knew that indoor barbecues could easily cause carbon monoxide poisoning, but she did not prevent it, it constitutes that she should have foreseen that this act might cause the death of others, but she was ...... because of negligence or confidence that it could have been avoided."

"That's just manslaughter." Su Ping sighed lightly and said: "If she is the murderer, what we have to do is to find and confirm irrefutable, and the evidence that she deliberately planned and killed people should not leave her the slightest opportunity." ”

"Try to restore the whole process of the case." "To determine the motive, we mainly rely on the behavior itself to make inferences, rather than leaving it to the suspect to refute," Yan said. ”

Su Ping snorted, and then said: "The focus is on you and the trace examination, and the source of carbon dioxide also needs to be investigated in detail, and the relationship between Zhou Jia and her husband's family also needs to be clarified, if she has a long-term conflict with them, she will naturally be inclined to judge her as intentional homicide." ”

After thinking about it, Qi Yuan asked, "Then what do we say now?" Do you want to detain Zhou Jia first? ”

"Summons first and bring back the detachment." Su Ping pondered for a moment, then made a decision, and said: "Lao Yan immediately did a blood test on the victim, and if it is determined that the deceased died of carbon dioxide poisoning, he will be directly detained." ”

"Okay." Yan Zhongxin said: "Then I'll take the body back first." ”

"Well," Su Ping nodded, and then said, "There are more corpses, let's take a hand together." ”

Qi Yuan and Brother Song immediately bowed their heads, put on gloves, and helped Yan Zhongxin and several forensic doctors to put the body into the body bag, and then walked out with the body bag, walked to the elevator room, went downstairs, and helped load it into the car, and then returned to the scene.

Subsequently, Su Ping was not in a hurry to summon Zhou Jia, but smoked quietly outside the scene.

Anyway, you still need to stay at the scene for a while, and you don't need to rush anything, and you can just take people away by the way when you want to close the team.

And Zhou Jia was still sitting on the sofa in a daze, his eyes were blank, and he didn't know what he was thinking or watching.

Qi Yuan glanced at her from time to time, secretly thinking, she should be thinking about how to get away with the crime and characterize this case as an accident, right?

At this moment, Qi Yuan and the others had basically determined that she was the criminal, but she herself didn't seem to know it.