Chapter 528 The Clues of Invisible

Author: Xueer Ge

Chapter 528 The Clues of Invisible

Peng Shinian frowned, and this expression made Da Zhao feel unsure. Just when Da Zhao was about to ask again, Peng Shinian took a deep breath and said seriously:

"I don't know how to explain it. The toxicity of this toxin is similar to that of tuterus toxin (TTX). It mainly inhibits nerve conduction through the influence on sodium ion channels. In short, it is a very terrible toxin with a high mortality rate.

In nature, eating shellfish with poisonous cyanobacteria after the red tide will cause poisoning reactions, and PSP is in a bound state in the shellfish body, so shellfish intake of this toxin will not cause harm to itself;

When a person consumes food containing paralytic shellfish toxins, the toxins will be released quickly and have a toxic effect. The incubation period is only minutes or hours, and the symptoms include paralysis of the limbs, headache, nausea, salivation and fever, rash, etc.

In severe cases, muscle paralysis, difficulty breathing, and even death due to suffocation. This concept is limited to small amounts of consumption. Injection or wound poisoning will be faster and deeper. Of course, PSP can also be extracted manually. I have read related papers, but because of the unstable toxins and the storage conditions, it cannot be made into freeze-dried, and can only be stored in liquid form."

The more Liu Yongxin heard it, the more shocked he became, and raised his hand to stop Peng Shinian.

"Wait Xiao Peng, what you mean is that this toxin must be made of a large amount of infected shellfish, or simply find cyanobacteria containing PSP for purification. After the poison is extracted, the liquid is inconvenient for transportation and storage, and may be extracted nearby?"

"right."

With a positive answer, everyone stood up.

"So, does that mean that even if the murderer cannot make the drugs himself, he is still a person who knows this toxin very well. He can easily obtain them. To obtain these PSPs, the corresponding laboratory is needed. What conditions are required for Xiao Peng to extract this PSP, and how much raw material is needed to obtain the amount of arrows that can soak the arrows?"

Peng Shinian pushed his glasses and frowned.

"I don't know, this requires calculation, I need to check the relevant research data, and I need to know all the laboratory information in the Qindao area. After all, the extraction of PSP is not a very high-end test, but the amount of raw materials required is very large. I will tell you the specific amount after calculating."

Liu Yongxin nodded.

"If you have a direction, it is better than if you don't. Then start calculating. Zhu Xingxing will go to Cui Lili to ask later. I think this thing that can be done by at least a first-level laboratory can be registered with the health department or the veterinary department.

Da Zhao reported to Bureau Xu. According to what Xiao Peng said, the raw materials needed to extract such a lot of toxins will not be very small. The way to purchase is definitely not an ordinary seafood market. These places are all caught by farmers or ordinary fishing. By the way, can all the shellfish of Xiao Peng be extracted?"

Peng Shinian shook her head, raised her cell phone and said.

"I just searched and found that China has related research on PSP. I found a 2010 document. According to the above records, China has a PSP sea area distribution map. 13 types of shellfish were found around Nanyue Province, with a toxicity range of 152~198 MU/(100 g)-1.

Eight categories were found in Bincheng waters, and the highest value of shell toxin was lower than 200 MU/(100 g)-1, while three categories were found in Qindao waters, with a toxicity range of 652~117 MU/(100 g)-1. The highest category was Hokkien scallops."

“What is Hokkaido scallop?”

Da Zhao was confused. After all, he was talking about nouns and couldn't react for a while. Peng Shinian quickly enlarged the pictures in the literature and showed them to Da Zhao and others.

Da Zhao glanced at him and became even more surprised.

"Fuck, isn't this just a scallop? This thing is actually poisonous?"

Liu Yongxin slapped Da Zhao in the face, and the crisp sound stopped the whispering sounds in the entire office.

"You listen to three or four, Xiao Peng said it's not the problem of scallops, but because this shellfish is good at using cyanobacteria, and PSP has no effect on this shellfish and can accumulate in the body. Just like a sieve, it exists in a specific sea area, and it has many toxic cyanobacteria, which will form toxic scallops. Is this what it means?"

Peng Shinian shrank his neck and nodded vigorously.

"It's still Liu Shu'er's greatness, that's what it means. However, in that report, there is only a regional map and does not indicate the specific location of Qin Island. I collected some information before coming. There is a scallop breeding area on it, but I don't know if it is this Hokkaido scallop."

Liu Yongxin waved his hand.

"Pang Tianhang and Zou Jialong helped check. What local data are needed? They came to contact the leader and start checking separately now. What else do you find on the scene Zhao Xinli?"

Da Zhao snapped his fingers and carried his notebook to Liu Yongxin. He knew Liu Yongxin's ability.

"There are also footprints. From the grass to the edge of the brick and stone road, there are four footprints left in total. One of them is half a footprint. It is very fresh. I am not familiar with the shoe sole pattern. The size is 44 sizes. Regarding height and weight, I don't know what I estimate. Uncle Liu, please show it."

Liu Yongxin put on his glasses, looked at the photos and videos carefully, slowed down, observed carefully, and finally held up the printed footprints and stood at the window, and after a while he slowly spoke:

"I'm not familiar with the patterns, but I don't know if you have noticed it. These shoes are 90% new, but the outer wear of the left heel is worse than the right heel, and the footprints on the right foot are deeper."

Da Zhao nodded and approached Liu Yongxin.

"I discovered that people who play football or perform confrontation exercises all year round will have different strengths of their left and right feet, and there will be a shift in the center of gravity. Of course, trauma, pelvic tilt, and scoliosis will also cause such gaits, but only four footprints are not in the state of travel, so I can't make an accurate judgment."

Liu Yongxin shook his head.

"Although it is not a state of marching, two of the four footprints were left behind by him. According to Xiaoqu, no images of them coming in and out were found. This person didn't know when Zhou Ning was going home, so he needed to wait for a long time. Who could stay there and leave only four footprints?

According to normal calculations, we got off work at 17:30, and Zhou Ning got home at the earliest time at 17:45. When did Zhou Ning get into trouble yesterday, you know?"

"When I arrived at the hospital at 23:47, Lao He said that he rushed downstairs when he heard a bang. Seeing Zhou Ning lying on the ground, he called Zhou Xiaoyu and did not delay the hospital that Zhou Ning came to. It took only ten minutes. Then the time for the accident was around 23:37."

"As you said, the time of the accident was 23:37, so how long did it take between 17:45 and 23:37? Besides, you can't check the spots, it means that you have been waiting for at least six hours. Can you squat here and stay still for so long?"

Da Zhao thought about it, made a squat, and then shook his head.

"My weight, let alone squatting for six hours, even if I squat for ten minutes, my legs will be numb. Besides, I can do it without eating or drinking for six hours. Can I not go to the toilet? But Liu Shuer, do you think he will know when Zhou Ning is going home? Just make a temporary arrangement like this, and you don't have to wait for so long."

Liu Yongxin frowned, and after thinking about it, he directly denied it.

"I have thought about this before. Yesterday, when you followed Director Xu to interrogate Liu Tiexong, there were not many people who knew when you would end. There were only one group of people, as well as some people from the first brigade of the Laboratory Department and the Criminal Police Detachment.

Oh, by the way, there are also Bureau Hu and Bureau Xu, the possibility of leaking the news is very low. Of course, unless someone can inquire, analyze the time when Zhou Ning goes back without knowing it, which can greatly reduce the accuracy."

Da Zhao shook his head vigorously.

"There were not many people inside yesterday. I just scattered them one by one, and it was impossible to reveal this. Uncle Liu, do you think it is possible? After finding a good location, he did not squat here, but found a location to observe the situation of Qinda Road. After all, at the end of this road, there are two communities related to Qinda Road."

Liu Yongxin thought about it.

"Stop guessing, you take people to the scene again and check every location. I think this analysis is quite reliable. I found that Zhou Ning's car was approaching, so I hid in the bushes in the garden and waited for an opportunity to act.

By the way, let’s check the part connecting the community and the school, whether there are damaged guardrails or traces left by these footprints. If there is no means of transportation, it means the direction you are looking for is incorrect.

Perhaps it was not passed by Qinda Yi Road. After all, this is a candied haws that only enter and cannot be exited. Any foreign vehicle can be seen at a glance. It is not impossible to climb a mountain from school to community."

Da Zhao opened his mouth slightly. At this time, Xiao Qu had already clicked on the map. Several people looked over and according to the display on the map, Xiao Qu was about to pull down to the lower campus, but Da Zhao stopped him directly.

"Stop, we kept thinking about how to get over. Isn't it more convenient to pass from Fushan? This just requires you to go through the parking lot between the two communities and go around to the fence separated from the school on the south side. You can turn over and go directly to the small garden, which can perfectly avoid all surveillance."

Xiaoqu took a look and drew a line on the map.

"Indeed, this will avoid patrol vehicles. If you observe with a telescope at the mountainside, you will find that if you want to turn into Qinda, you will find that you can quickly get off the guardrails and reach the small garden. It will take less than ten minutes to get ready."

Da Zhao bit his lip, feeling a little excited.

"After the way from Qinda, it's an uphill and there are two speed bumps. With Zhou Xiaozhou's cautious attitude, he is definitely slow enough. The car stopped in the parking lot, holding his own bag and clothes. He also likes to wipe the reflector when getting off the car. The ink marks have been available for more than ten minutes. I think this possibility is even greater."

Liu Yongxin waved his hand.

"Then don't stand there, hurry up and go to the scene to check it out. Xiao Peng, please go with me. Can't you also check that document on the way?"

I haven't returned to my work yet, and the updates sent by the parking on the roadside were no one praising me? (Arrogant face)
Chapter completed!