"By the way," Xun Mu asked, "Who is the person who contacted Director Liu through Lao Meng?"

"I don't know. Director Liu didn't say anything. You can ask later." Su Ping said, "This clue is very crucial. We should also keep him in our own hands. With his cooperation, this case will definitely go much smoother."

"Contact through Lao Meng..." Xun Mu thought thoughtfully and asked: "Did this person directly ask Lao Meng for Bureau Liu's contact information, or did he tell Lao Meng the matter and let Lao Meng pass it on to Bureau Liu?"

"I didn't even ask. I was in a hurry at the time and didn't bother to ask so many questions."

Xun Mu pinched his chin.

The two squatted in the smoking area and chatted for an hour.

In fact, there is no fundamental breakthrough, because there are too few clues, and it is just talking in a roundabout way. I repeat a few points over and over again, but the more I talk about it, the more confusing it becomes. Afterwards, I just start talking nonsense.

As they watched the sun slide over their heads, it was already noon. Both of them had smoked most of their packs of cigarettes, and their throats felt tight. They finally stood up, but they didn't move. They just stood there chatting.

Because my legs are numb...

Qi Yuan has already finished his intravenous drip, but Su Ping still suggested that he rest here and return to the case tomorrow morning if he is almost recovered.

Although his injury was not too serious, it had hurt his back and had some impact. However, this injury was really nothing. He had just enough rest for the day, and it would be better if he was not given some strenuous work afterwards.

After the numbness in their legs eased a lot, the two of them went to the cafeteria to eat something and asked two special police officers to protect Qi Yuan. Su Ping and his wife planned to leave.

After such a long time, some clues should have been found. It would be a good idea to hold an impromptu meeting to consolidate the findings of various groups.

As soon as the two got into the car and Su Ping started the ignition, Xun Mu pointed at it: "Wait... look at that, is it Lao Wei's car?"

"Huh? It seems so." He glanced twice, then unbuckled his seat belt, opened the car door and got out of the car, raised his hand and waved.

The car quickly spotted Su Ping, drove to his side and stopped. Then the car door opened and a famous trace inspector walked out. He quickly ran up to Su Ping and said, "Captain Su, we found something, Director Wei."

Let us come over and show you something."

"Huh?" Su Ping raised his eyebrows: "If you find something, you can't report it directly, but you have to come here specially?"

"It's about the 'modus operandi'." He said, asking Su Ping to follow him.

At this time, Xun Mu also happened to get out of the car, so he nodded and walked with Su Ping and the trace inspector to the back of Lao Wei's SUV.

The trace inspector opened the back door, then turned slightly to make way for Xun and Mu.

The two of them saw at a glance several evidence bags stacked together, each containing some parts that could not be seen clearly.

"What is this?" Su Ping couldn't help but ask.

"We were confused at first. We had never seen this thing before." The trace inspector replied, reaching out to rummage for a moment. He quickly selected an evidence bag, handed it to Xun Mu, and said at the same time: "Until we found this electric valve.

, and then if you identify other things, you can roughly guess them."

"oh?"

"This valve is not actually a release valve, but... how should I put it?" The trace inspector scratched his head, barely organized his words, and then said: "In short, this is an important part of the 'container' that holds carbon dioxide.

This container is not the one-piece gas tank that we conventionally understand, but is made up of multiple parts spliced ​​together with a structural form similar to mortise and tenon joints. The gas pressure in the tank is used as a structural strength support, which can be used within a certain range.

The structure is stable within the range of pressure inside the tank.

But this remote control electric valve... We speculate that it should be an important factor in the stability of the gas tank. Once the valve is forcibly pushed open, the entire mortise and tenon structure of the gas tank... to

The mortise and tenon structure around the valve will change, and the internal air pressure originally used as a strength support will instantly destroy this part of the structure, triggering a chain reaction, causing the entire tank to collapse, and the internal gas to instantly escape.

We asked the technical team to make a restoration based on the various parts on site, and asked experts in this field to make a rough judgment. We guessed that the gas tank should be able to withstand a maximum pressure of 10 to 12 atmospheres, and the internal volume is about 60 liters.

In other words, under its extreme state, it can instantly release about 600 to 720 liters of carbon dioxide gas. Such a large amount of gas can be instantly released into indoor space, which can make the carbon dioxide concentration in the air within a certain range exceed 10%. This concentration is enough.

It can cause people to be instantly poisoned and faint..."

"Wait a minute," Su Ping interrupted the trace inspector and said, "There is a problem here."

The trace inspector paused, then nodded: "Captain Su, tell me."

Xun Mu took out his mobile phone and quickly calculated it, and then said: "If 600 liters of carbon dioxide is released slowly, even in a closed indoor space, it will not pose much of a threat."

"Hmm." Su Ping said: "The indoor area is 12 square meters, and the height is 3 meters, which is 36 cubic meters. If 600 liters of carbon dioxide escapes, it will only increase the indoor carbon dioxide concentration by about 1.67%.

In addition, the carbon dioxide content in the air itself is still less than 2%, and carbon dioxide is harmless at this concentration."

The trace inspector scratched his head: "But as I just said, the carbon dioxide does not escape slowly, but is released instantly..."

"That's the problem." Xun Mu glanced at him, chuckled and said, "Have you ever seen a flat tire?"

"Ah?" The trace inspector was stunned.

"The tire pressure is generally in the range of 2.4 to 2.7 atmospheres. The noise caused by a tire blowout is huge, and people will be injured if they get close, let alone 10 atmospheres.

Under such air pressure, if, as you said, the structure of the gas tank changes and the gas inside is instantly released...then there is no doubt that this gas tank is tantamount to a 'fragmentation bomb', which is very lethal.

By then, let alone the two poisoned colleagues who would have been killed by the explosion, I'm afraid even the furniture in the room would have been destroyed. When we arrived at the scene, it was absolutely a mess, as if it had been bombed."

The trace inspector scratched his head: "I didn't expect it to be so detailed, but judging from the scene, it should be similar to what we guessed..."

"Maybe the air pressure inside the tank has not reached the limit value." Xun Mu said softly: "If it is a mortise and tenon structure, then as long as the internal pressure is slightly greater than the external pressure, it should be enough to support the stability of the structure."

"But if there is too little carbon dioxide, it will not be enough to cause poisoning and coma in a short period of time." Su Ping continued: "I guess this gas tank should not only have this arrangement, but there may be something else.

Pay attention to...
Chapter completed!