The attention of several people was instantly attracted, and they immediately turned their heads to look over, and then Su Ping bowed his head slightly, raised his legs first, and walked to the balcony.

Not to mention, the balcony of this big house is not small, the visual width is about three meters, the length is more than seven meters, and there are more than 20 bungalows, which can be said to be very comfortable.

There is also a treadmill in the corner of the balcony, facing the window, which can ensure good air quality when running indoors, and the vision is also very wide, and it is estimated that it is very refreshing to run.

At this time, a small long table was placed in the middle position, and a barbecue grill was placed on the other side, but at this time, the barbecue grill had already turned over, the charcoal fell to the ground, and some charcoal fell on a middle-aged man.

As Zhou Jia said, the clothes on the old man's body have been burned, and the parts of his body that come into contact with the charcoal have even been burned and carbonized.

Another man was lying on the table, and two women were lying on the ground.

On the other side, there are several large buckets filled with water and some iron skewers, presumably for barbecue ingredients. However, Qi Yuan was a little puzzled, can a family of five eat barbecue, can they use so many buckets?

Soon, Qi Yuan's attention fell on the corpse again.

The three corpses were severely cyanotic, with white foamy sputum at the corners of their mouths, and the middle-aged woman's mouth was bloody.

But......

Qi Yuan's eyebrows quickly twisted.

He roughly swept around, and saw no signs of carbon monoxide poisoning - cherry red, whether it was lips or nails, and several of the victims were blue-purple instead of cherry red.

Although blue-purple is also a sign of asphyxia, and although the essence of carbon monoxide poisoning is also hypoxic asphyxia, the two are actually very different.

Asphyxia caused by carbon monoxide is because carbon monoxide combines with hemoglobin to form carbon monoxide hemoglobin, which crowds out the position of oxygen, resulting in insufficient oxygen supply to the body, and then causing asphyxia.

However, hemoglobin itself, that is, deoxygenated hemoglobin, is dark red and purplish-red; Oxyhemoglobin is bright red, and carbon monoxide hemoglobin is cherry red.

However, the parts with relatively thin skin and abundant blood vessels, such as the extremities of the extremities, the mucosa of the mouth and nose, the lips and other parts, can often show the color of subcutaneous blood, so the color of these parts and other characteristics can be judged whether the victim is suffocated or poisoned.

This is common sense, and Qi Yuan is also clear.

Sure enough, Su Ping quickly noticed this, and looked at Yan Zhongxin, with a slight doubt in his eyes.

"You also found out that the deceased didn't look like he was poisoned by carbon monoxide." Yan Zhongxin stood up, frowned and said:

And ...... After further autopsy, I found that there was a small amount of vomit in the deceased's trachea, the muscles of the limbs were stiff, and there was a large amount of white foamy sputum in the nasal cavity and mouth with blood streaks, and the two victims had urinary incontinence......"

Su Ping raised his eyebrows: "Just say it directly, what is the cause of death?" ”

"I can't be sure for the time being, it's guessed that it's suffocation, but it's hard to say specifically, so I have to pull it back for a more detailed autopsy." Yan Zhongxin said.

"Suffocation?" Su Ping frowned, couldn't help but squat down and look at it carefully for a moment, then frowned and said, "There is no sign that the mouth and nose have been covered, there are no strangulations on the neck, and there are no water stains on the face...... is so dignified, how can it suddenly suffocate, or is it suffocated by four people? ”

Yan Zhongxin added: "There is no rose-tooth phenomenon, unlike a typical mechanical asphyxia caused by external forces. ”

Qi Yuan frowned slightly, suddenly thinking of what happened to him in Pingkuan County, a flash of inspiration flashed in his mind, and he immediately asked tentatively: "Carbon dioxide?" ”

"Huh?" Yan Zhongxin turned his head and glanced at him: "Did you peek at the outline?" ”

"......" The corners of Qi Yuan's mouth twitched, and explained: "No, I just suddenly thought that I also had an experience of suffocation and coma in Pingkuan County, and that time I was in a coma due to carbon dioxide." At that time, the brother of the Pingkuan Criminal Investigation Brigade was killed because of this. ”

Su Ping rolled his eyes: "As a criminal policeman, I can actually fall into the hands of those criminals and fall into the hands of those vicious guys, shame!" ”

"Yes," Yan Zhongxin pouted: "The Huan you are complaining about now, I don't know who was in a hurry at that time, and the chaos was almost ......."

"Humph!" Su Ping suddenly coughed vigorously.

Yan Zhongxin pursed his lips again, but he didn't say anything more, only said, "Okay, let's get down to business." Indeed, I suspect that the victims may have died of carbon dioxide poisoning, or that the sudden increase in carbon dioxide concentrations caused the four of them to suffocate instantly, but I can't say for sure now, and I have to go back for a blood test or even a puncture. ”

Brother Song pinched his chin and asked, "Don't you need to dissect?" ”

"There are no obvious signs of trauma, internal injury, no need." Yan Zhongxin shook his head and said, "If you can, try to leave a whole body for the victim." ”

Su Ping glanced at him, nodded slightly, and didn't say much.

Qi Yuan said thoughtfully: "If carbon monoxide poisoning, it may be an accident caused by incomplete charcoal burning during barbecue, but if it is carbon dioxide poisoning...... It's clearly people for. ”

Brother Song took the words, glanced in the direction of the living room, and said at the same time: "There is no one to visit tonight, so ...... Obviously, Zhou Jia's crime is extremely suspicious. ”

"Don't rush to conclusions," Su Ping shook his head: "Many people are not aware of the harm of carbon dioxide, maybe the deceased used carbon dioxide to create a special atmosphere, and as a result, he was poisoned?" This possibility is not out of the question. ”

After a pause, he was happy, shook his head and said: "But in general, the possibility is extremely small, what Song said is right, Zhou Jia is the most likely to commit a crime." ”

Qi Yuan pursed his lips and said, "But what Team Su said is also right, the possibility of oolong is not small...... Oops, if Zhou Jia shifted all the blame to the victims...... I'm afraid it's not going to be easy.

Or, if she really can't get rid of it, she excuses herself by saying that she wants to liven up the atmosphere, but accidentally caused a murder, so as to get away with the crime and fight for manslaughter? ”

Su Ping frowned, glanced at the living room, and then said, "Be quiet, don't let her listen to this......

What you said is indeed a problem, we have to guard against it, we have to find a way to lock down the evidence as much as possible, so that she doesn't have a chance to quibble. ”

"First of all, quantity." Brother Song immediately said: "We can check the amount of dry ice, if it exceeds a certain value, there is reason to think that Zhou Jia's motive is not pure." In this regard, we may be able to start with the purchase channel. ”

Su Ping and the others glanced at each other and nodded slightly.

After thinking about it, Brother Song added: "There is also the balcony door, have you noticed, none of the charcoal rolling on the ground entered the living room, and there is a small amount of carbon ash on the balcony door, which means that when the victim is poisoned by carbon dioxide, the balcony door is closed." ”

"Oh?" Su Ping immediately turned his head to look at the balcony door, and thought, "Close the window, do you close the door again?" ”