Soon, Lao Wei walked back to the living room, his brows furrowed.

Su Ping leaned over and asked, "What's wrong?" Didn't find it? ”

"I can't say I didn't find it." Lao Wei pursed his lips, his face was a little strange, and after a while, he raised his hand and pointed to a large vertical box in the living room, and said: "I found that thing, I observed it, the outer layer should be engineering PE plastic, very thick, and the inner material is unknown, but I guess it should be used for thermal insulation." ”

After a pause, he continued: "In other words, this is a thermal insulation bucket, the volume should be about 90 liters, and there are four wheels underneath, which is easy to move." ”

Su Ping's eyes immediately looked over.

He had noticed this box-like and barrel-like thing before, but since he had never seen such a thing before, he didn't understand what it was, and he didn't pay much attention to it.

And now, Lao Wei has spoken his guess......

"90-liter insulated bucket." Su Ping narrowed his eyes and glanced at Qi Yuan.

Qi Yuan silently took out his mobile phone, checked some information, and then used a calculator to calculate for a while, and then said in a low voice:

"Team Su, I just found out that this kind of thermal insulation barrel is specially used for temporary storage, transfer, and transportation of granular dry ice, and the thermal insulation effect is excellent, 90 liters of dry ice are put inside, and the daily loss is not more than 6%. In addition, because there are gaps between the grains, the actual loading capacity will be greatly discounted, about 2-5%.

Assuming that the vat has been bought for two days, and the gap accounts for 5% of the total volume, then the actual total volume of dry ice should be around 85.5 liters, with a loss of 6% on the first day, a remaining 80.37 liters, and a further loss of 6% on the second day, and a remaining volume of about 75.55 liters.

However, the density of dry ice is 781.1717 times that of carbon dioxide at room temperature and pressure, and 75.55 liters of dry ice can produce 59 cubic meters of carbon dioxide.

The height of this balcony is about 3.5 meters, the area is 20 bungalows, and the total volume is 70 cubic meters, which is filled with nearly 60 cubic meters of carbon dioxide, which is obviously enough to kill. ”

Su Ping glanced at him and said lightly: "Your math teacher or physics teacher taught you to use liters to make the volume unit of solids?" ”

Qi Yuan: ???

After a while, he finally reacted, rolled his eyes, and complained: "Then I want to talk about standards, and if you say anything about cubic decimeters, you have to think that I am so complicated to talk about it, anyway, you can say two sentences when you want to scold me." ”

"Dare to talk back?" Su Ping was a little stunned: "I know that I want to scare you, and you still don't have to bear it?" Stiff wings? Come and show Lao Tzu! ”

Qi Yuan quickly shrunk his neck and hid behind Brother Song.

Brother Song smiled, shook his head lightly and said, "Team Su, forget it, give me a face, and go back and fight again." ”

Qi Yuan: ???

At this time, Zhou Jia seemed to have finally been attracted by the movement here, and his eyes slowly fell.

Su Ping noticed her turning her head and immediately glanced at a few people.

Then Lao Wei immediately walked a few steps in her direction, pulled his face, and asked in a questioning tone before she spoke: "Madam, can you tell me what the sealed vat standing there is and what it is for?" ”

Her face changed for a moment, but she quickly recovered as before, raised her head and asked in surprise, "What bucket?" Where did the barrel come from? Wait, that thing is a barrel? I...... I don't know? What did that come from? What are you doing? How can a good bucket be like this, it's like a trash can. ”

Lao Wei's eyebrows twisted: "You mean, such a big bucket is placed in your house, and you haven't seen it all the time?" ”

"No, I've noticed." Zhou Jia said: "It was brought back by my husband yesterday, I don't know what it is, he didn't say anything when I asked him, and I wasn't very interested, so he was it." ”

"Your husband brought it back?" Lao Wei was stunned for a moment, and then asked again.

She nodded and said, "yes." ”

Su Ping and the others not far away glanced at each other, and their faces became a little serious.

It's really a good idea to blame your husband for the thermos bucket and never mention the dry ice, as if you don't know anything about it.

If she had planned to be more thoughtful, use her husband's mobile phone and identity information when placing an order, or even simply let her husband place an order directly and pull the dry ice back, it would have been even more "perfect", and it would have been extremely difficult to prove her criminal behavior through the source of the dry ice.

She could even push the story of the deceased dying of carbon dioxide poisoning to the letter, saying only that she thought they were carbon monoxide poisoning so she called the police and called the emergency number, and she didn't even think about the possibility of carbon dioxide poisoning, because she didn't even know that there was dry ice at home, and there were things that quickly made large amounts of carbon dioxide.

Fortunately, she is not without flaws, and Yan Zhongxin mentioned some of them before.

For example, the living room door was actually closed at the time of the crime, but she said it was always open.

In addition, to quickly empty the carbon dioxide while ensuring that the indoor carbon dioxide concentration is not too high, and to avoid poisoning, you must first open the door to enter the balcony, then quickly close the door to avoid carbon dioxide entering the room, and then immediately open the window, and then quickly leave the balcony and ensure that the balcony door is closed.

When they arrived at the scene, the window was wide open, but she said that the window was always closed, and she pushed it open when she realized that something was wrong.

According to her, sixty cubic meters of carbon dioxide remained indoors, and she was inevitably poisoned and unconscious.

For the police, these two lies are enough to arouse their suspicion and make them stare at Zhou Jia to death.

It's just that this woman may be more difficult than they originally judged, she is a very smart and thoughtful guy, and she must not be taken lightly.

"Originally, I thought that she didn't know the difference between carbon monoxide and carbon dioxide poisoning, so she would design such a place," Qi Yuan's voice was extremely low, and only Su Ping and Brother Song on the side could hear it: "But now it seems that she can be regarded as far-sighted." ”

Su Ping hooked his fingers on his big arm, signaling Qi Yuan not to talk more, and then stretched out his thumb and pointed to the law enforcement recorder vaguely.

The meaning is obvious - when you contact Zhou Jia, you must turn on the law enforcement recorder throughout the whole process, and record all her lies, so that they can be used as an important evidence when exposing her.

If it can be proved that the suspect is full of lies, it will naturally be more unfavorable to her in the future trial, and the credibility of her sophistry will be lower, and the case will be characterized as intentional homicide rather than manslaughter.

Therefore, one of the next key tasks is to find the contradictions in her words during the interrogation, so that her words will have a logical conflict.

Then you can't let her have too many opportunities to write the manuscript, and you have to let her talk more.

Of course, the most critical and core work is to find evidence.

Lao Wei said a few more words to her and asked a few questions, she always insisted that she didn't know what was in the box at all, only said that when her husband pulled it back yesterday, she asked her to take a hand, her husband pulled it in front, she pushed it in the back, and it took some effort to pull the things home.

She also sighed that fortunately there is an elevator, this thing is weirdly heavy, and it is very difficult to push with wheels.

Lao Wei nodded slightly, and did not mention anything about dry ice or the cause of death of the deceased, nor did he say that the function of this bucket was to keep warm and insulating, as if he was just routinely asking about some inconsequential things.

After asking some painless questions, Lao Wei asked for her opinion and said, "This vat, we need to take it back and inspect it carefully, you see?" ”

She hesitated for two seconds, then nodded lightly and said, "Okay, just take it." ”

"In addition," at this time, Su Ping stepped forward and said, "Please come with us too." ”

"Me?" She looked up, was stunned for a moment, and asked suspiciously, "Why?" ”

"Conduct a routine investigation and make a detailed record." Su Ping's tone was quite polite, not aggressive, and only said: "You are also a witness and survivor of this accident, we need to know more about this, we can only ask you, I hope you can understand." ”

The hesitation in her eyes faded, she nodded slightly, stood up, and said, "Okay, I'll change my clothes first." ”

"Please." Su Ping smiled.

Seeing her go upstairs, Qi Yuan immediately walked over and asked in a low voice, "Team Su, do you want to find a female brother to go up and keep an eye on her?" ”

Su Ping: ???

Qi Yuan looked at him as if he had seen a ghost, and couldn't help but wonder a little: "What's the matter, Team Su?" ”

"No," the corners of Su Ping's eyes twitched: "What the hell is a female brother?" Have you had a bubble in your head in the past two days? ”

"Uh...... Ahem, slip of the tongue. Qi Yuan coughed dryly twice, and then asked, "But just let her go up by herself, is it really not tight?" ”

"What's the matter?" Su Ping raised his eyebrows: "Can she still run?" This is the eleventh floor, this one is still a large duplex, not the hyped jump in recent years, each floor is a standard height of 3.3 meters, two floors are considered the first floor, in fact, it is equivalent to the twenty-second floor, she can still run through the window? ”

Qi Yuan scratched his head and stopped talking.

After a while, Zhou Jia came down.

It's said to be a change of clothes, but in fact, it's just a thin jacket and a pair of shoes.

Su Ping nodded lightly, motioned for the big guy to close the team, and then turned around and left the place.

Of course, trace inspectors still need to stay at the scene for a while longer to continue the investigation.

……

Back in the detachment, Su Ping inquired about Zhou Jia as soon as possible - this was a strategy that had been set before, not giving her too much time to write a draft.

She also seems to know a little bit about the laws and rules of domestic criminal procedure, and she doesn't shout for a lawyer or anything, but only keeps her head down the whole time, doesn't say a word, and occasionally sheds a few tears.

It was as if it had hit her hard.

But Qi Yuan really couldn't feel the slightest sadness from her, and there was no feeling of resonance.

Not to mention anything else, when she wiped her tears, she even subconsciously paid attention to her makeup.

Qi Yuan has a black question mark on his face, don't cry if you're afraid of crying!

Su Ping didn't say much, just looked at her quietly, looked at her for about two or three minutes, and then asked, "First of all, Ms. Zhou, let's continue with the fact that you didn't answer my question positively." What is the relationship between you and your parents-in-law and sister-in-law? ”

Zhou Jia frowned slightly.

Then she quickly raised her eyebrows and said, "It's good, our family is relatively harmonious, my mother-in-law really treats me as a daughter, I respect her, she takes care of me, and she is much closer than her son." ”

"Are you sure?" Su Ping chuckled lightly and said, "Remind you, the object of our inquiry is not just you, what is your relationship with them, you can't hide it, it's better to seek truth from facts." ”

"What is realistic? After all, don't you doubt me? Zhou Jia was a little excited, and wanted to stand up.

But soon, she restrained her impulse, took a deep breath, sat down again, then shook her head, took out a lady's cigarette from the small white bag, lit it, and spit out two puffs of smoke, before saying indifferently:

"I think I do have a good relationship with them, but to be honest, I'm not sure what they say about me behind my back, because I can't satisfy everyone.

Merely...... is still the sentence just now, I think I have fulfilled the duty of a daughter-in-law, they are also pleasant and kind at home, and they have never had major conflicts. ”

"So, there are a lot of small contradictions, right?"

"It's inevitable, right?" Zhou Jia rolled her eyes: "I still have conflicts with my biological parents after living for a long time, and I still quarrel, what is this?" ”

Su Ping nodded, didn't care too much, and only continued to ask: "Barbecue at home, who initiated it, or who proposed it?" ”

"My husband." Zhou Jia said: "He thought it was very interesting, and he bought a barbecue grill, a blower and coal. ”

After a pause, Zhou Jia said: "I reminded him to beware of carbon monoxide poisoning, but he didn't care, and said that it would be good to open the window and turn on the fresh air conditioner when the time comes, and also said that the coal and blower he bought are very good, which can effectively avoid incomplete combustion of coal."

I also thought about it for a long time before agreeing, after all, if the windows of our balcony are fully open, the ventilation conditions are still very good, and the outdoor is almost the same.

It's just that I didn't expect that after a thousand instructions, I don't know if it was my mother-in-law or who, or I closed the window, no, something happened, right? ”

Su Ping glanced at Qi Yuan, motioned for him to take notes, and continued: "When you were at the scene before, you also said that it was your mother-in-law who closed the window. So, did you see it when she closed the window? ”

Zhou Jia's eyelashes trembled slightly, and then he shook his head and said, "If I want to see it, I must stop it." ”

"Then why don't you guess it's her without thinking?"

"Because every time it rains, she has to run up and down and close the windows," Zhou Jia replied in a natural tone: "And the position of my mother-in-law is by the window, and the opposite window is my man, although he is quite arrogant, but I don't think he will be sloppy enough to close the window at that time." ”

Su Ping glanced at her and chuckled: "It's quite reasonable...... However, as far as we can tell, the four victims did not actually die of carbon monoxide poisoning. ”

"Huh?" Zhou Jia seemed to have expected it, and did not subconsciously show the stunned feeling when he was caught off guard before, but naturally asked "shocked": "What?" Not carbon monoxide poisoning? Then how can they ...... good manners?"