The breakfast at the construction site cafeteria where the incident occurred was relatively simple, consisting mainly of vegetable soup, steamed buns, and pickled vegetables.

The pickled vegetables had already been checked on-site. They were all sealed in bags and poured out after being cut open.

As for why they didn’t buy the relatively cheaper bulk pickled vegetables, according to Wu Guichun, he would have to cut them himself, and with few hands, hiring an extra person wasn’t cost-effective, so they bought the bagged pickled vegetables.

Moreover, pickled vegetables aren’t free; the workers eating breakfast pay for however much they consume based on a few steamed buns, bowls of porridge, and pickled vegetables.

Since the pickled vegetables were bagged, it was practically impossible for them to contain pufferfish toxin.

Additionally, Lu Chuan had already checked the packaging of the pickled vegetables and found no signs of pinholes or similar marks, so the possibility of poisoning via injection was low.

The issue then lies with the steamed buns and vegetable soup.

The investigation on the steamed buns is almost complete, what about the vegetables?

"The situation over here is pretty much the same as the steamed buns. The vegetable supplier not only supplied the vegetables to the construction site cafeteria where the incident occurred but also to other places."

The officer in charge of the investigation held up one hand: "This vegetable supplier delivered vegetables to a total of five construction site cafeterias nearby. Besides construction sites, he also supplied vegetables to two institutional cafeterias."

"We checked the source of the goods from this vegetable supplier, and they were all wholesale from a higher-level market, stored together, and randomly selected by the delivery personnel based on type and quantity."

"So far, except for the construction site cafeteria where the incident occurred, there are no issues at the other places."

"And the delivery person did not encounter anyone else touching his vegetables while on the road."

"So, if there was an issue at this stage, the only possibility is that the delivery person was involved."

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

"The construction site cafeteria has no conflicting interests with him, nor is there any conflict. There’s no reason for the delivery person to poison."

The morning ended, and the investigations from Action Groups One and Two were basically concluded.

In the meeting room of the Criminal Investigation Team, members from several groups were reporting.

"Let’s talk about our Action Group Two first."

Zhang Hui sat up straight: "The cafeteria at this construction site contracted by Wu Guichun was originally managed by the Boss’s own nephew, a man named Zhou Chunsheng."

"From the perspective of conflicting interests, it’s possible for Zhou Chunsheng to tamper with Wu Guichun’s cafeteria."

"But we found out that Zhou Chunsheng didn’t have the time to commit the crime."

"The boss of this construction site also has several other construction sites, and the cafeterias at those sites are all handled by Zhou Chunsheng."

"From last night to the morning of the incident, Zhou Chunsheng was at another construction site 100 kilometers away, with witnesses and testimonies confirming this, so he didn’t have the time to commit the crime."

"We also looked into some workers on the construction site who were often dissatisfied with the amount of food, leading to frequent disputes with the cafeteria."

"Most of them have alibis, and from the motive of the crime perspective alone, just for a meal or the amount or taste of food, poisoning to kill doesn’t seem very likely to me."

"And, more importantly, pufferfish toxin must be extracted from wild pufferfish."

"Nowadays, wild pufferfish are rare in the market, and even if available, they’re very expensive."

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

Qin Yong, sitting at the main position, listened intently to Zhang Hui’s report.

"You mean to say that from the perspective of investigating Wu Guichun’s interpersonal relationships, the possibility of retaliatory poisoning is minimal?"

Zhang Hui nodded affirmatively, "Based on the current results of the investigation, this possibility is quite low."

"Okay, Sun Jun, how about the investigation from Action Group One?"

"We focused our investigation on the Aihui Farmers’ Market, the vegetable supplier, and the steamed bun supplier’s basic situation."

"Both suppliers don’t just provide vegetables and steamed buns to the site of the incident’s cafeteria; they also supply several other construction sites."

"So, from the source of the goods, these two suppliers should not have any issues; otherwise, the problem shouldn’t only affect this one site of the incident."

"Left are the delivery personnel for the steamed buns and vegetables. We also investigated their relationship with the construction site of the incident, which is purely a work relationship, unlikely to have major conflicts of interest that would lead them to poison and kill."

"So, we think the possibility of poisoning from the suppliers’ end is... quite low."

Qin Yong furrowed his brows deeply, aware of the capabilities of the two men.

Since they can fairly confidently provide investigation results suggesting a low possibility of crime, it means that these two lines of inquiry are essentially at a dead end.

But the question remains.

There’s no problem with the source of the steamed buns and vegetables, and it’s unlikely that Wu Guichun would poison himself.

The workers dissatisfied with the cafeteria have been investigated too, with no time to commit the crime.

Zhou Chunsheng, who might have had an interest conflict due to the cafeteria contract with Wu Guichun, was 100 kilometers away and also didn’t have the time to commit the crime.

So who exactly is the poisoner?

Could it be that the damn pufferfish jumped into the pot itself?

Qin Yong’s gaze ultimately fell on Liu Guodong.

Although this case, on the surface, seems like the Crime Scene Investigation would uncover very few clues.

After all, the incident location is the cafeteria.

Crowded and with high flow, it’s impossible to pinpoint a suspect using regular fingerprint or footprint techniques.

The Forensic Doctor’s side is the same, with the deceased having died from pufferfish toxin poisoning, and the death occurring within an hour, the identity of the deceased already confirmed.

These two important technical support departments appear to play a minimal role in this case.

However, perhaps due to Lu Chuan’s excellent performance in multiple cases, Qin Yong instinctively looked at Liu Guodong.

"Old Liu, has Lu Chuan returned from the scene? Any discoveries?"

But this time, Liu Guodong shook his head, slightly disappointing Qin Yong.

"Lu Chuan and his team are still in the basement; as for the results..."

Bang!

At that moment, the meeting room door suddenly swung open, and everyone turned around.

Coming in was Lu Chuan.

It wasn’t the first time Lu Chuan had been greeted with such attention.

Hence, he wasn’t too nervous; he hurried over because there was an important discovery downstairs.

Qin Yong, seeing Lu Chuan barging in like this, not only didn’t scold him but seemed somewhat excited.

"Lu! Is there any new discovery?"

Lu Chuan nodded, "Captain Qin, indeed, we have some new findings!"

Lu Chuan quickly walked over to Liu Guodong and inserted a USB drive into the laptop.

"Captain Qin, we found two crucial clues at the scene."