Serious Crime Unit 1

Chapter 266 Carbon monoxide poisoning (9)
"It must be at least 12 hours. I am on duty here tonight so that I can observe the data at any time. In addition, I can prevent people from destroying the scene. If this is a murder case and the murderer sees us coming to detect carbon monoxide, he may cause damage."

"Okay, hard work."

"Also, I'm afraid that Wu Dasheng's fire won't be big enough and he will reduce the amount of exhaust gas emissions in order to evade responsibility, so I have to arrange for someone to monitor him at all times."

"Okay, I'll arrange for Zhou Ting to supervise Wu Dasheng. You two can take care of each other while on duty." After Jiang Yiming finished speaking, he walked out of the scene and told other team members to go home and sleep.

The next day, all team members came to Linjiang Community. Jiang Yiming asked Luo Jin if there was any change in the test results.Luo Jin said the result was the same as last night.Jiang Yiming came to the boiler room and saw Zhou Ting sitting next to Wu Dasheng and watching him burn the fire. He added coal to the boiler from time to time because Zhou Ting was afraid that the boiler would not have enough coal and the carbon monoxide produced would not be lethal enough.

Jiang Yiming asked Luo Jin and Zhou Ting to go home and rest. He, Xiao Ke, Lu Yingying, and Wu Jiang took over their work. Until the evening, the data of the detector was still the same. Then, it was impossible to determine that Wu Dasheng was the initiator.

Jiang Yiming believes that carbon monoxide must be emitted from the boiler, but why does it fail to reach a lethal amount when tested?Could it be that different batches of coal produce different amounts of carbon monoxide when burned?In order to solve this problem, Jiang Yiming and Wu Jiang drove to the Provincial Coal Research Institute to ask experts.

Professor Zhang received the two of them, and after the two parties exchanged polite greetings, Jiang Yiming told Professor Zhang the basic details of the case, and then said: "We have encountered a problem and need Professor Zhang's help."

"Please tell me, it is an honor for me to help the No. 1 Major Crime Team solve the case." Professor Zhang is in his early 40s, full of energy, and not the silver-haired old man he imagined.

“Does the concentration of carbon monoxide produced by burning coal of different batches and qualities differ?”

"Yes, poor-quality coal does not burn fully and produces a higher concentration of carbon monoxide. Good-quality coal can burn more fully, and the concentration of carbon monoxide produced is naturally small. It also has something to do with the weather. If it is a rainy day, carbon monoxide will be emitted more slowly. On a sunny day it’s the opposite.”

"Oh, I know, thank you Professor Zhang for your guidance!"

"You're welcome. If you have any questions in the future, just call me. There is no need to come to the door in person and waste your precious time."

"Okay!" Jiang Yiming shook hands with him and said goodbye.

Jiang Yiming and Wu Jiang checked the weather forecast for October 10 and learned that it would rain heavily that day and the rain would not stop until 31 pm. Therefore, they had to buy the same batch of coal and conduct testing on a rainy day.They went to Wu Dasheng and asked him to take a look at the purchase order for coal.

They found that the coal burned during the test was from a different batch than the coal on October 10, and belonged to a different coal company.They went to Yuanyang Coal Company and bought a ton of coal, because this was the company Wu Dasheng purchased from on October 31.After the coal was transported to the bathhouse, Jiang Yiming asked Wu Dasheng to use their coal to burn the boiler. Although Wu Dasheng did not understand, he did so.

Luo Jin used a detector to test the site again, and it still took 12 hours. The result was that the carbon monoxide content only rose to about 0.29%, and at the highest it only rose to 0.30%, which still did not reach the lethal dose.What has actually happened?
Jiang Yiming had no choice but to call Professor Zhang: "Hello, Professor Zhang, we bought the same batch of coal and used it to burn the boiler on rainy days. We tested the exhaust gas discharged from the boiler for 12 hours and found that the concentration of carbon monoxide was only It reaches 0.30%, which is less than a lethal dose. I have to ask you for advice."

"Okay, you drive me, and we go to the site to have a look." "Okay, thank you!"

Jiang Yiming and Wu Jiang drove to pick up Professor Zhang to the scene. Professor Zhang looked at the scene carefully and said: "I judge it may be like this: if it rains heavily, the sewer is blocked by garbage, and the blocked place happens to be Liushanshan's underground drain. In front of the water pipe, the exhaust gas discharged from the boiler cannot be emitted forward. It can only be squeezed into Liu Liushan's floor drain pipe, which can make the concentration of carbon monoxide reach a lethal level. Liu Liushan ate with the kitchen door closed. So, he was unknowingly poisoned and died.”

"Why are there no cases of poisoning among residents in the same building?"

"I think Liu Xishan's floor drain pipe may not have a bend, and he rarely cooks or eats. There is no way for sewage to accumulate in the water pipe, because the bend and sewage will dilute the carbon monoxide, so he was poisoned. But other residents' sewage pipes not only have bends , and there is accumulation of sewage, and their floors are relatively high, so they will not be poisoned. If you don’t believe me, ask someone to go to the sewer to check.”

Jiang Yiming called the property manager and asked him if the sewer had been blocked recently?He said: Yes, on November 11, some residents reported to them that the sewers were clogged and asked them to hire professional workers to clear them. We had to hire people to clean up the sludge blocking the sewers.

Jiang Yiming and Wu Jiang came to Liu Lushan's kitchen and inserted a four-meter-long iron wire through the floor drain of Liu Lushan's kitchen. The results proved that the water pipe did not bend back, and Jiang Yiming was relieved.

Jiang Yiming was worried that Wu Dashengli used carbon monoxide to murder Liu Laoshan. Even if he was found out by the police, it would be just an accident and he would have to pay some money at worst.Jiang Yiming took Wu Dasheng back to the criminal police team and asked Lu Yingying to conduct a polygraph test on Wu Dasheng. The results proved that Wu Dasheng did not lie.

After Song Jiajiang and Ou Baohuang received this result, they were very disappointed, but they had no choice because the No. 1 Major Crime Team had solved countless cases and was recognized by the public as the most authoritative. They finally filed a lawsuit in court and filed a huge compensation against Wu Dasheng.

"Xiao You, can you stay? I will treat you as my own son." Ou Baohuang stood at the ticket gate of the eastern suburbs long-distance bus station, holding You Cailiang's hand tightly and said.

"No, my parents are old. I want to go home and be filial to them." You Cailiang said sincerely looking at Ou Baohuang.

"Don't you still have a younger brother? After my son left, I felt like I had lost my soul...Don't you like Pei Shaofang? We can help you chase her, and we can buy you a wedding room..."

"No, although I like her very much, I prefer the countryside and my parents. There is no noise, impetuousness, and haze in the city. The deep friendship between comrades will not be blocked by an agreement..." You Cailiang suddenly realized You shouldn't say such things to an old man who has lost his son. He paused for a while and said: "If Pei Shaofang also liked me, I would ask her to start a business in the countryside. The money I earn now is double her salary, although it is a little harder and a little more tiring. . If she is afraid of going to the countryside to endure hardships and hardships with me, then we are not destined to be together." You Cailiang said firmly and proudly.

Ou Baohuang's heart hurt. She knew that the adoption agreement 30 years ago was completely wrong, because one time when she took the cash to the bank to deposit, she forgot to close the safe. When she came home, she saw Liu Laoshan reading the adoption agreement. Knowing that he was not her biological child, he often quarreled with Liu Tianqi. In the end, they had a huge quarrel and moved to Linjiang Community. If he had not moved out, he would not have died unexpectedly.

You Cailiang waved goodbye to her politely and climbed on the bus bound for Songyin County. After a while, the car started and gradually disappeared from Ou Baohuang's eyes. Tears of disappointment rolled out of her eyes, and her vision became blurry...

(End of this chapter)