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

"I don't know, Bureau Liu didn't say it, you can ask when you go back." Su Ping said: "This clue is quite critical, we should also take him into our own hands, with his cooperation, this case will definitely go much smoother." ”

"Contact ...... through Lao Meng" Xun Mu thought for a while, and then asked: "Did this person directly ask Lao Meng for the contact information of Liu Ju, or did he tell Lao Meng about the matter and let Lao Meng tell Liu Ju?" ”

"I didn't ask, I was in a hurry at the time, and I didn't care about asking so much."

Xun Mu pinched his chin.

The two squatted in the smoking area and chatted for hours.

In fact, there is no essential breakthrough, because there are too few clues, just talking about some circles, a few points over and over again, but the more you talk, the more chaotic it becomes, and after talking about it, you simply talk nonsense.

Seeing that the sun was slipping to the top of their heads, it was noon, both of them had smoked most of their cigarettes, and their throats were uncomfortably tight, but they finally stood up, but they didn't move, they still stood in place and chatted.

Because of numbness in the legs......

Qi Yuan had already lost a little bit, but Su Ping still suggested that he rest here, and then redevote himself to the case tomorrow morning if he recovered almost well.

Although his injury was not too serious, after all, he hurt his back, which had some impact. But this injury is really nothing, and the rest of the day is almost over, and then he doesn't arrange some strenuous work.

After the leg numbness eased a lot, the two went to the cafeteria to eat something, and asked the two special police officers to protect Qi Yuan, and Su Ping and the others planned to leave.

In the past so long, it is better to find some clues, and it is better to have an impromptu meeting to consolidate the findings of the various groups.

As soon as the two got into the car, Su Ping lit the fire, and Xun Mu stretched out his finger and pointed: "Wait...... Look at that, is it Lao Wei's car? ”

"Huh? It seems to be. He looked twice, then unbuckled his seatbelt again, opened the door, got out of the car, raised his hand and waved.

The car quickly found Su Ping, so it drove to his side, stopped, and then the car door opened, and a famous trace inspector walked down, ran quickly to Su Ping and said, "Team Su, there is a discovery, Director Wei asked us to come over and show you something." ”

"Huh?" Su Ping raised his eyebrows: "If you find anything that you can't report directly, you have to find it specially?" ”

"There's something about the 'modus operandi.'" As he spoke, he asked Su Ping to come with 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, and then turned slightly sideways to make way for Xun Mu and the others.

At a glance, the two of them saw 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 hadn't seen this thing." The trace examiner replied, reached out and rummaged for a moment, and quickly selected a evidence bag, handed it to Xun Mu and said, "Until we find this electric valve, and then identify other things, we will probably guess it." ”

"Oh?"

"This valve is not actually a deflation valve, but a ...... How to say it. The tracekeeper scratched his head, reluctantly organized his words, and then said, "Anyway, this is an important part of the 'container' that holds carbon dioxide."

This container is not the kind of integrated gas tank that we routinely understand, but is spliced by a plurality of parts with reference to the structural form similar to mortise and tenon, and uses the gas pressure in the tank as the structural strength support, which can ensure the stability of the structure under a certain range of air pressure in the tank.

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

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

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

In other words, it can instantly release about 600 to 720 liters of carbon dioxide gas in the limit state, and such a large amount of gas can be released into the indoor space instantaneously, which can make the carbon dioxide concentration in the air within a certain range exceed 10%, which is enough to make people faint instantly......"

"Wait," Su Ping interrupted the trace examiner and said, "There's a problem here. ”

The trace inspector paused, and then nodded: "Team Su, you say." ”

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

"Hmm." Su Ping said: "The indoor is calculated according to 12 square meters, 3 meters high, that is, 36 cubic meters, and 600 liters of carbon dioxide is spilled, which only increases 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, this carbon dioxide is not a slow release, but an instantaneous release......"

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

"Huh?" The trace inspector was stunned.

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

Under such air pressure, if it is really as you said, the structure of the gas tank changes and the internal gas is released instantaneously...... There is no doubt that this gas tank is tantamount to a 'fragmentation bomb', and its lethality is very great.

At that time, not to mention that the two poisoned colleagues had to be blown up, I am afraid that even the indoor furniture would have to be destroyed. ”

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

"Maybe the air pressure in the tank is not at the limit." 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 is not enough to poison a person in a coma for a short time." Su Ping continued: "I guess this gas tank should not only be arranged in this way, maybe there are other things......

In this way, please check it carefully, it is best to copy this gas tank exactly and study it carefully...... By the way, all the parts of those gas tanks are here? ”