Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 513 New Clues
The breakfast in the canteen at the construction site where the crime occurred was relatively simple. Vegetable soup, steamed buns and pickles were the main food sources.

The pickles have been inspected at the scene. They are all sealed bags of pickles, cut open and poured out.

As for why he didn't buy relatively cheap pickles in bulk, Wu Guichun said that he had to cut the pickles in bulk himself. He had few people and it was not cost-effective to hire another person, so he bought bagged pickles.

And the pickles are not free. Workers who have breakfast eat as many steamed buns and bowls of porridge as they eat, and the pickles cost them as much as they eat.

Pickles are packaged, so it is basically impossible to find tetrodotoxin in them.

Moreover, Lu Chuan had checked the outer packaging of the pickles and found no traces of pinholes, so injection poisoning was unlikely.

The problem arises with steamed buns and vegetable soup.

The investigation on the steamed buns is almost done, what about the vegetables?
"The situation here is almost the same as the situation at the steamed bun side. The vegetable supplier not only supplies vegetables for the canteen at the construction site where the crime occurred, but also for other places."

The criminal police officer in charge of the investigation gave a slap in the face: "This vegetable supplier has delivered a total of vegetables to the canteens of five nearby construction sites. In addition to the construction sites, he is also responsible for delivering vegetables to the canteens of two public institutions."

"We checked the source of this vegetable supplier's goods. They are all wholesaled from the upper-level wholesale market. The vegetables are all put together, and the delivery staff randomly selects them based on type and quantity."

"So far, except for the canteen where the incident occurred, there are no problems in several other places."

"And the delivery person did not encounter anyone else who touched his food while on the road."

"So, if there is a problem in this link, there is only one possibility that it is the deliveryman's fault."

"But why? The other party has no motive for committing the crime?"

"The canteen at the construction site where the crime occurred has no interest or conflict with him. There is no need for the delivery man to poison."

At the end of the morning, the visits and investigations of Action Group One and Action Group Two have basically come to an end.

In the conference room of the Criminal Investigation Detachment, members of several groups were reporting.

"Let's talk about it first with the second operation team."

Zhang Hui sat up straight: "The canteen at the construction site contracted by Wu Guichun turned out to be in charge of the boss's nephew, a man named Zhou Chunsheng."

"From the perspective of interests involved, it is possible for Zhou Chunsheng to engage in some tricks in Wu Guichun's canteen."

"But we checked and found that Zhou Chunsheng did not commit the crime at any time."

"The boss of this construction site has several other construction sites, and Zhou Chunsheng is in charge of several canteens there."

"From last night to the incident this morning, Zhou Chunsheng was at another construction site 100 kilometers away. There were witnesses and testimonies, so there was no time to commit the crime."

"In addition, we also investigated some workers on the construction site. Some workers were not satisfied with the amount of food in the canteen, which led to frequent quarrels."

"Basically there is an alibi, and from the perspective of the motive for committing the crime, I don't think the possibility of poisoning and killing someone just because of the quantity or taste of one or two meals is not very high. .”

"There is a more important point, tetrodotoxin, which must be extracted from wild puffer fish."

“Not to mention that there are very few wild puffer fish on the market now, and even if they are available, they are very expensive.”

"Ordinary workers wouldn't buy this, right?"

Qin Yong sat in the main seat and listened carefully to Zhang Hui's report.

"You mean to say that from the perspective of the interpersonal relationship between the canteen director Wu Guichun, there is basically no possibility of revenge poisoning?"

Zhang Hui nodded affirmatively: "Judging from the current investigation results, this possibility is unlikely."

"Okay, Sun Jun, how about the investigation by the action team?"

"We focused on investigating some basic information about vegetable suppliers and steamed bun suppliers at Aihui Farmers Market." "Both suppliers not only provided vegetables and steamed buns to the canteen where the crime occurred, but also to several other construction sites."

"So from the perspective of the source of the goods, there should be no problem with these two suppliers. Otherwise, the accident should not be limited to the construction site where the crime occurred."

"The rest are delivery men who deliver steamed buns and vegetables. We have also investigated their relationship with the construction site where the crime occurred. It is an ordinary working relationship. It is unlikely that there is a major conflict of interest that led them to poison and kill."

"So we think the possibility of poisoning on the supplier's side...is not very high."

Qin Yong frowned deeply. He knew the abilities of the two of them.

Since the investigation results can be given with certainty that the crime is unlikely, it means that these two clues are basically broken.

But here comes the problem.

There is no problem with the source of the supply of steamed buns and vegetables, and Wu Guichun, the cook, is unlikely to poison himself.

Wu Guichun or the workers who were somewhat dissatisfied with the canteen were also investigated, and there was no time to commit the crime.

It is also possible that Zhou Chunsheng, who had an interest in Wu Guichun because of contracting the canteen, was also 100 kilometers away and had no time to commit the crime.

Who was the poisoner?

Could it be that the pufferfish jumped into the pot by itself?
Qin Yong's eyes finally fell on Liu Guodong.

Although this case seems to be on the surface, there are definitely very few clues that can be found during the current investigation.

After all, the place where the crime occurred was the cafeteria.

There is a lot of noise and movement of people, and it is impossible to identify criminal suspects from ordinary spot detection techniques such as fingerprints and footprints.

The same is true for the forensic doctor. The deceased died of tetrodotoxin poisoning. The death time was less than an hour, and the identity of the deceased was also confirmed.

It seems that these two important technical support departments did not play a big role in this case.

However, perhaps out of respect for Lu Chuan's outstanding performance in many cases, Qin Yong subconsciously looked at Liu Guodong.

"Old Liu, Lu Chuan has also returned from the scene, right? Did you find anything?"

But this time Liu Guodong shook his head, making Qin Yong a little disappointed.

"Lu Chuan and the others were still in the basement, but..."

bump!
At this moment, the door to the conference room suddenly opened and everyone turned around.

It was Lu Chuan who came in.

This is not the first time that Lu Chuan has been saluted by everyone like this.

So I'm not particularly nervous. The reason why I rushed here in such a hurry is because I just made an important discovery down there.

When Qin Yong saw Lu Chuan intruding like this, not only did he not blame him, but he looked a little excited.

"Xiao Lu! Have you discovered anything new?"

Lu Chuan nodded: "Team Qin, we did make some new discoveries!"

Lu Chuan quickly walked to Liu Guodong and inserted a USB flash drive into his laptop.

"Team Qin, we found two important clues at the scene."

(End of this chapter)