After Li Andi and Chen Chuyao left the police headquarters, they immediately rushed to the pharmacy where they had been there once, and the person in charge was a little surprised to see the two who had gone and returned, and immediately came forward to ask about the intention of the two.

"We found that the model of the oxygen cylinder Xie Changjing purchased last time was different from the previous purchase, so we wanted to know the specific situation!" Andy Lee said bluntly.

"Oh?!" The person in charge was a little puzzled, but he didn't expect the two of them to pay attention to such details, and took back the list and looked at it carefully.

"Oh...... That is true! The person in charge pointed to the model of the oxygen cylinder purchased recently and explained: "This model of oxygen cylinder is a product with error-proofing function, which can simply prevent the user from insufficient oxygen supply due to improper operation!" ”

When Li Andi and Chen Chuyao heard this, they both nodded slightly, thinking that it made sense, since they were using a more secure product, it should be able to provide better protection.

"In fact, we also have a fully intelligent intelligent oxygen cylinder that can monitor the patient's physical condition and make changes in oxygen content in a timely manner. However, there are still many people who buy less expensive mechanical oxygen cylinders. The person in charge continued.

"Are you saying that Xie Changjing's recent purchase of products is not the latest technology?" Chen Chuyao immediately sensed the contradictions in the whole incident.

"Yes! This error-proofing mechanical oxygen cylinder is always available! It's not the latest model. The person in charge replied dryly.

"Xie Zhijie's old man is wealthy, and he can use more expensive and high-tech smart oxygen cylinders." Chen Chuyao continued: "Xie Changjing has always used cheap mechanical oxygen cylinders, but this can be explained by usage habits. But why did Xie Changjing suddenly choose another oxygen cylinder that is not the latest product recently? ”

"Chu Yao, do you mean that Xie Changjing did it on purpose!?" Li Andi said along Chen Chuyao's train of thought.

"Of course, the possibility of a coincidence cannot be ruled out!" Chen Chuyao said thoughtfully: "Can we take a look at those two types of oxygen cylinders?" ”

"Absolutely!"

The person in charge responded cheerfully, and then took the two to the product display area. I found two different models of oxygen cylinders and showed them to Chen Chuyao and Li Andi.

Chen Chuyao carefully looked at the two oxygen cylinders placed side by side, and from the appearance, there was no difference at all.

Under the observation of Li Andi, he also felt puzzled, so he asked: "What is the difference between these two types of oxygen cylinders?" ”

The person in charge pointed to the position of the valves of the two oxygen cylinders and explained: "The main difference between the two oxygen cylinders is in this valve. ”

The person in charge first pointed to the old oxygen cylinder valve and said: "This valve does not have an error-proof function, the output of oxygen starts from 0, and the oxygen content is adjusted by the user adjusting the position of the valve knob." If the operation is done incorrectly, the oxygen content does not reach the patient's required value, and there is a high probability of serious consequences. ”

Chen Chuyao and Li Andi took a closer look at the valve and the mechanical flow meter with a pointer that could read the oxygen content. The scale of the flow meter does start from 0 until the maximum flow rate of the oxygen cylinder. The words on that scale are very small, and even young people like Chen Chuyao and Li Andi need to get close and read them carefully to see the scale on it. Fortunately, the flow meter is color-coded, with red labels indicating hazards in both low and high oxygen levels, and green labels indicating safety in normal oxygen areas. Users can ensure that the oxygen flow is within a safe range by ensuring that the pointer of the flow meter is in a safe green zone.

The person in charge pointed to the oxygen cylinder with the error-proofing function and continued: "This oxygen cylinder is equipped with a pressure check valve, and the valve will only be opened when the oxygen flow reaches a safe value, so as to ensure that the user will not have insufficient oxygen content due to misoperation." ”

Chen Chuyao and Li Andi took a closer look at the valve and flow meter of this oxygen cylinder, and sure enough, as introduced by the person in charge, the starting value of the flow meter was not 0, but directly from the area with normal oxygen content, until the maximum flow value. The color designation of this flow meter is also slightly different. It starts with a green sign for the safety zone, then slightly above the safety zone, using a yellow sign for an early warning, followed by a red sign for danger.

Chen Chuyao thought for a moment, and then said: "The criminal structure has basically taken shape......

The next day, in the name of the staff of the life insurance company, Li Andi summoned three heirs to the house of the old man Xie Zhijie.

After everyone arrived, the three heirs unexpectedly found that next to the two insurance company staff they had seen, there was also Lucy, the maid of the old man Xie Zhijie.

"Why is this woman here?!" Xie Changming asked in surprise and impatience.

"Yes! She's been fired! I shouldn't be here! Xie Changjing also said, his tone was not good.

Xie Changliang was always gentle and elegant, but he was silent.

"Could it be that the insurance money also has a share of this woman!" Xie Changming seemed to have thought of something, and said sharply: "We resolutely can't approve of this!" She's my dad's servant! How can I inherit my dad's insurance money! ”

"Bringing everyone here today, in fact, there is one thing to tell you!" Andy Lee said calmly.

When several people heard this, they looked at each other for a while, but Xie Changming took the lead and said, "What are you talking about!" Is it about the payment of insurance benefits? If not, I wouldn't have time to spend with you! ”

"Is it related to the insurance claims investigation?" Xie Changliang asked tentatively.

"You're still not done!" Xie Changjing said impatiently: "If you want to send it, send it quickly, if you don't send it, forget it!" Don't be foolish! ”

"The thing I want to announce to you today is ......" Li Andi said loudly: "The death of the old man Xie Zhijie is not a natural death!" Rather, someone did it deliberately. ”

When Lucy heard this, she knew that Li Andi and Chen Chuyao must have found out the real cause of the death of the old man Xie Zhijie, and perhaps the identity of the murderer had also been locked, so she breathed a sigh of relief and couldn't help but accuse: "The master told me more than once before his death that if he died, someone must have killed him!" ”

"Nonsense!" Xie Changming suddenly got up and shouted angrily: "The doctors have said that my father died of natural causes, don't you just want to pay compensation?" As he spoke, Xie Changming pointed his finger at Lucy, and then reprimanded: "And you, an outsider, don't sow discord in us, who doesn't know that you covet my father's property!" If you talk nonsense again, I will sue you for spreading rumors and slander! ”

Xie Changliang stepped forward and grabbed Xie Changming and persuaded him: "Big brother, don't be angry, listen to what they have to say first!" ”

"What's so good to hear! I think they just want to repay the debt, and I don't want the money anymore, so you should leave for me! Xie Changjing also cursed.

When Xie Changming heard that his sister actually claimed to give up the insurance money, he was anxious, and he also followed Xie Changliang and said, "Why don't you listen to what they have to say first!" ”

Li Andi looked at Chen Chuyao and motioned for her to continue.

"First of all, I would like to explain one thing to you!" Chen Chuyao said to a few people in understanding: "Originally, we always thought that the old man Xie Zhijie died because of the deterioration of emphysema, and we once wondered if it was because of taking drugs that would cause side effects that caused adverse reactions. However, we have been ignoring the effects of oxygen levels on the elderly. ”

"Do you mean that my uncle died of suffocation due to insufficient oxygen intake?!" Xie Changliang asked following Chen Chuyao's words.

"Then this must be a good thing that this woman has done!" Xie Changming pointed at Lucy again and said loudly: "It must be that she didn't give my dad a good oxygen, and his old man's condition deteriorated!" ”

"It's not ...... at all!" Lucy pleaded sadly: "The master has been very peaceful before he died, and there is no sign of hypoxia at all!" ”

"That's the preconceived impression that patients usually die of suffocation when they lack oxygen!" Chen Chuyao ignored the arguments of several people and continued: "According to the information I learned from the doctor, patients with chronic emphysema are very sensitive to oxygen inhalation, which can lead to suffocation death not only when the oxygen content is too low, but also suffocation death when the oxygen content is too high!" ”

"You mean my uncle died because of the high oxygen levels?" Xie Changliang asked puzzled.

"It's impossible!" When Lucy heard this, she said nervously: "On the day of the incident, I gave the master medicine and oxygen according to the usual operation, how could there be a problem!" ”

Chen Chuyao didn't rush to answer the questions of the two, but asked Xie Changjing, "May I ask Ms. Xie, how far is your house from Xie Zhijie's old man's house?" ”

Xie Changjing was stunned for a moment, not knowing what Chen Chuyao meant, but he still subconsciously replied: "It takes about 15 minutes to drive!" ”

Chen Chuyao asked Lucy again, "Do you remember how long it took for Ms. Xie and the doctor to arrive after the old man Xie Zhijie had a problem that day?" ”

Lucy immediately recalled, "I called the doctor first, and then the three in turn. Because the situation was urgent, I kept an eye on the time, and I remember that the doctor arrived about 8 minutes after receiving the call! Miss Xie was a little earlier than the doctor, but I can't remember the exact time! ”

"Then may I ask Ms. Xie, how did you get there in less than 8 minutes when it originally took about 15 minutes to travel?" Chen Chuyao asked next.

"I ...... I was ...... Coincidentally, I drank coffee at a nearby café! Xie Changjing explained: "After receiving Lucy's call, I came directly, so it took a short time!" Any questions? ”

Chen Chuyao looked at Xie Changjing calmly, and continued to say softly: "Let's explain this question first, and then ask Miss Xie to answer my other question......