Su Ping glanced at her, but still didn't say Yan Zhongxin's inference, only shook his head and said: "The specific cause of death is still under investigation, but the forensic doctor has ruled out the possibility of their death from carbon monoxide poisoning, because the signs of carbon monoxide poisoning are too obvious, but these signs are not available to the victims." ”

Zhou Jia opened her mouth again, as if she was shocked, and kept muttering in her mouth, saying something like how it was, how could it be, how could it be and how she died.

Su Ping asked a few more questions, then asked Brother Song and Fang Chang to come over and take over, while he took Qi Yuan out of the inquiry room and walked to the forensic department in the basement.

At this time, Yan Zhongxin happened to be at the door, pinching a stack of reports, intending to push the door in.

Seeing Su Ping and Qi Yuan, he raised his eyebrows, sighed, and asked, "This is the team back?" ”

Su Ping smiled, then got straight to the point and asked directly: "What do you say?" Is carbon dioxide poisoning causing death? ”

"Yes." Yan Zhongxin nodded, and at the same time pushed open the door, motioning for them to enter the dissection room to speak.

Su Ping and Qi Yuan followed and went in.

Later, Yan Zhongxin handed the report to Su Ping and said: "The carbon dioxide concentration in the blood of the deceased is very high, typical respiratory acidosis, there is obvious carbon dioxide retention, the respiratory center is seriously inhibited, and the lack of oxygen in all organs of the body is obvious. ”

Su Ping glanced at the report twice, then handed it to Qi Yuan, and then said: "Originally, I thought that after the cause of the victim's death was determined, Zhou Jia could be directly detained." ”

"How?" Yan Zhongxin raised his eyebrows and said, "What happened again?" ”

"This Zhou Jia, who has two brushes, pushed everything to her husband." Su Ping pursed her lips and said, "We found a dry refrigerator in her house, with a capacity of 100 liters, but she said that it was customized by her husband, and she didn't know what it was or what it contained." ”

When Yan Zhongxin heard this, the corners of his mouth twitched, and he couldn't help asking: "In other words...... Can't be detained? ”

"For the time being, keep her for twenty-four hours at most." Su Ping sighed lightly and said, "If you insist on detaining her, it can't be said, her parents will definitely ask a lawyer to intervene." ”

"Yes, almost all the clues point to her, but because there is no evidence, she can't be detained." Yan Zhongxin spread his hands, and then said: "Don't look at me, I don't have a problem, I have basically done all the work that the forensic doctor can do, the body is placed here, there is no suspicion, and I can't do anything." ”

Su Ping waved his hand: "It's okay, just determine the cause of death and the time of death." I have to think about it now, how do I determine the evidence. ”

"It's not easy to do," Qi Yuan couldn't help muttering: "Fingerprints are not reliable, the scene of the crime is her house, it is normal to leave fingerprints, but she also said that when the refrigerator arrived, her husband called her to help move it, and it was normal for her fingerprints to be left on the box." ”

"That is to say," Yan Zhongxin continued: "This case seems simple, and she is the only suspect, so there is a high probability that she is the murderer, but it is difficult to lock the evidence to convict her?" ”

"It doesn't have to be that difficult," Su Ping shook his head and said, "She doesn't recognize dry ice now, so let's just find a way to make sure that she knows that dry ice is placed in the dry refrigerator, and even has touched those dry ice." ”

Yan Zhongxin thought for a while, then shook his head again, and said: "How can it be so simple, the dry ice has long been sublimated into carbon dioxide and dissipated, even if there are some traces on it, it will be all taken away by the sublimated dry ice, and we can't fix it." ”

Qi Yuan suddenly said, "Do you remember the big buckets and basins on the balcony?" I took a few looks, and there was some water in it, which was probably used to quickly sublimate like dry ice, right? ”

Su Ping glanced at him, shook his head, and said, "Lao Wei has checked those buckets and basins, but it is still the same sentence, it doesn't mean anything, it is her house, the barrels and basins are all her things, and it is normal to have her fingerprints." ”

"But ......," Qi Yuan said, "She also ate there at the beginning, if she had made dry ice to create fog to create an atmosphere at that time, how could she not know that there was dry ice at home?" Isn't that a contradiction in what she said? ”

"She can still quibble that she doesn't know what those buckets and basins are for, and she didn't have those things before she left." Su Ping pouted:

"At the moment, there are only two fatal flaws - one is why she didn't have carbon dioxide poisoning; The other is balcony doors and windows. ”

Qi Yuan raised his eyebrows: "With these two items, it's not enough to detain her?" ”

"You can stay in detention for 24 hours," Su Ping sighed and said, "The detention letter can also be issued, but as I said just now, his parents will definitely find a lawyer to do things, which is a bit difficult to do." ”

"I don't think it matters if you are detained or not." Qi Yuan said: "As long as you ensure that she can't escape, our criminal detention is to facilitate the investigation and prevent the suspect from escaping and committing suicide, and it is not to be angry with the criminals, nor is it a divine horse to punish and punish, and it is the same if we determine the evidence and then detain it." ”

Su Ping glanced at him and asked lightly, "Are you going to star?" Are you responsible for someone who ran away? ”

Qi Yuan pursed his lips and didn't answer.

Yan Zhongxin said with a smile: "What Xiao Qi said is not wrong, there is no need to be angry with this Zhou Jia, if she can be detained, if she can't be detained, she will be released, she will be restricted from going out of the city, and she will send someone to keep an eye on her, where else can she run?" Can't fly away with wings? If she really wants to run, then it's easy to do, and she can directly detain people. ”

Su Ping pouted, Yan Zhongxin and Qi Yuan are different, he is old, he is not good.

Shaking his head, Su Ping calmed down and said, "Let's follow the procedure first." Lao Yan, you rest early, don't tire yourself, I'll go to the trace inspection to find Lao Wei. ”

"Well, you guys should rest early, don't burn yourself to waste." Yan Zhongxin waved his hand, and then said: "I pulled the body closer to the freezer and went to rest, and called me if I had something." ”

"We'll give you a hand." Su Ping said with a smile.

……

Ten minutes later, the trace examination department.

Su Ping knocked on the wide open door, coughed dryly, and then walked in directly, looked left and right, and asked, "What about the old Wei people?" ”

"Team Su," Chai Ningning turned sideways and said with a smile: "He just went out to the toilet, and he will be back soon." ”

"Huh?" Su Ping raised his eyebrows, was stunned for two seconds, and asked in surprise, "Why are you still here?" Doesn't the baby need to be fed? ”

"Everyone is busy, so I can't go back first." Chai Ningning chuckled and shook his head, then continued:

"My maternity leave has been taken, and it's time to return to normal work, otherwise my colleagues are afraid of opinions, and then I won't have a good time in the future." I put a few servings of the baby's milk in the refrigerator, and I have called my husband to watch and feed, don't worry, don't worry. ”

"Whatever you want." Su Ping nodded lightly and didn't say anything more.

"Does Team Su want to know about the trace examination of this case tonight?" Chai Ningning took the initiative to ask, "It just so happens that I also know that I have studied the next ......."

"Oh?" Su Ping looked at her again and asked, "What do you say?" Did you find anything? ”

"It's a pity that there are a lot of clues, but none of them are of much value." Chai Ningning shook his head and said:

"In this case, no murder weapon was used in the conventional sense, the weapon used to commit the crime was actually carbon dioxide that did not bear traces, and at the same time, the scene was still the suspect's house, and the usual experience, as well as important fingerprints, shoe prints, etc., were of little use."

A look of disappointment flashed on Su Ping's face, but he nodded understandingly.

Chai Ningning then asked, "Is there any breakthrough on Director Yan's side?" ”

Su Ping shook his head.

"Then ......" Chai Ningning also sighed lightly and said, "It seems that this case can only rely on you to investigate yourself, and we can't help." Speaking of which, this woman is not simple, she actually ......"

"It's not really clever." Qi Yuan took over and said, "It's just that this person is quite thoughtful, and he can think of many things in advance, so that her husband can buy the 'murder weapon', this step is the most troublesome part." ”

At this time, Lao Wei also went and returned, said hello to Su Ping Qiyuan with a smile, and at the same time wiped his hands on the back of his clothes, wiped off the water stains, and chatted with them.

But Su Ping didn't have much of the heart to chat, asked a few words, and learned that there was really no gain from the trace examination, so they all left.

At the same time, because it was very late, many of the visits could not be carried out and could only be postponed until tomorrow.

Brother Song and Fang Chang couldn't ask the reason, so they had to end the inquiry first according to Su Pingyuan's instructions, and then let Fang Chang and Zhou Jia chat first, and Brother Song came to find Su Ping.

"Team Sue!" From a distance, he saw Su Ping and Qi Yuan walking out, so he immediately stopped them, and then trotted over and said, "Team Su, everything that should be asked has been almost asked, what should I do now?" ”

"Let go." Su Ping pursed his lips and said, "Xiao Qi and I are personally staring at her, and when the visit starts early tomorrow, we will get more clues, and ask again." ”

Brother Song opened his mouth and asked in amazement, "Just let it go?" Didn't you say detention before? ”

"If you don't meet the conditions for the time being, it's not good to detain, and there will be trouble." Su Ping sighed lightly, shook his head and said, "Actually, it doesn't matter, just let it go, as long as people can't run." ”

Brother Song frowned and hesitated for a moment, finally bowed his head slightly, said that he knew, and then asked, "Then, where are you going now, Team Su?" ”

"Buy something and use it later." Su Ping said with a smile: "It's not easy to stare at people at night." ”

"This ......" Brother Song opened his mouth again, then gritted his teeth and said, "Team Su, you are a lot old, let's do these things." ”

"It's okay, no, just do your part, have a good rest tonight, you will be the main force tomorrow." Su Ping chuckled again, shook his head and said, "It's time to take Xiao Qi to cultivate some experience in this area, he has been a criminal police officer for so long, and he hasn't been watching it properly." ”

Brother Song had no choice but to purse his lips and nod.

Then Su Ping led Qi Yuan out of the detachment.

After walking all the way, Qi Yuan finally couldn't help but ask curiously, "Team Su, what are we going to buy?" Isn't there in the detachment? ”

"No, I have to go to the supermarket." Su Ping shook his head.

Qi Yuan was even more curious: "No, Team Su, what kind of tracking tools are there in the supermarket that we don't have?" ”

"Snacks, drinks, melon seeds, and eight-treasure porridge." Su Ping continued to say calmly: "Don't swallow something, how can you survive such a long night, we still have to take turns to rest, I sleep and you can't prevent you from dozing off when you're awake?" What if you fall asleep and someone runs away?"

Qi Yuan opened his mouth.

So do you want him to stare at people with melon seeds at that time?

Su Ping continued: "The first time you star, it is estimated that you will be more nervous and excited, and you will not be able to sleep. So you wake me up at midnight at three o'clock. ”

Qi Yuan nodded and said oh.

Soon walked to the supermarket, Su Ping bought a lot of food and drink, walked back to the detachment and stuffed it back into the car, and pulled Qi Yuan into the car.

After a short while, I saw Zhou Jia walking out of the detachment.

She seemed a little cold, wrapped her arms around her, rubbed her palms, and then pulled her phone out of her bag.

Soon, she took a taxi, Su Ping stared at the license plate, immediately squinted, took out his mobile phone and called the brother of the traffic management bureau, asked him to help check and stare at a car, and then drove with headphones to follow.

The two cars, one in front of the other, were separated by about two or three hundred meters, and they drove unhurriedly on the road, and their speeds were maintained at forty or fifty kilometers per hour.

After driving all the way, Qi Yuan gradually became a little puzzled, and couldn't help asking, "This Zhou Jia, where is she going?" It's been about ten kilometers away, right? ”

"Looking at the direction, it seems that I am going to the north city." Su Ping pursed his lips and said softly: "I probably want to find her parents, her parents' biye is in the resort park in the north city, and since handing over the company to Zhou Jia, they have basically lived a semi-retired life." ”

"Oh?" Qi Yuan was stunned again: "Team Su, when did you investigate her?" ”

"This information can be found by Xiao Gao casually." Su Ping pursed his lips and continued to concentrate on driving.

Sure enough, the online car-hailing car was at the gate of the resort park in the northern urban area, and Zhou Jia got out of the car and walked into the community.

Su Ping also stopped far away and turned off the headlights to avoid exposure.

Seeing this, Qi Yuan frowned slightly, and couldn't help but ask, "Team Su, what's going on now?" This community looks like the security is doing a good job, let's go in and be easy to expose, right? ”

"Don't worry." Su Ping shook his head and took out his mobile phone unhurriedly.

Kotaka from the technical team sent him a message.

This resort park occupies a large area, with a total of three gates, as well as two entrances and exits for the underground parking lot.

Every entrance and exit is monitored.

At the same time, there are also several monitoring positions around the villa of Zhou Jia's parents.

Qi Yuan thought for a while, and immediately understood what Su Ping meant, couldn't help but open his mouth, and asked in surprise: "That, Team Su, what you said about stalking, should it be for us to watch the surveillance in the car?" ”

"Or else? Park your car and watch from under the building? Su Ping rolled his eyes and said: "Different situations have different stalking strategies and methods, and we must learn to be flexible." ”