On the morning of the third day after the incident, the sky over Haizhou City was filled with leaden clouds, and the occasional rumble of thunder sounded like gods fighting at the edge of the sky.

Lu Chuan had a decent rest yesterday. The work at the Crime Scene Investigation office last night was relatively simple, mainly preparing for the DNA information identification and comparison.

This morning, the action team will organize personnel to collect blood samples from the seven tenants and the landlord in the rental property.

It should take about one or two hours to complete, and the Crime Scene Investigation office aims to finish extracting the DNA information of all the residents and the landlord today, as well as the comparison and identification of the DNA information with the blood traces left by the killer.

Compared to the work at the Crime Scene Investigation office, the Forensic Doctor’s side is much busier. Shen Yan barely slept last night.

There were a total of four bodies. Two were autopsied on the afternoon of the crime and the morning of the previous day, and the other two were autopsied in the afternoon and evening of the previous day.

An autopsy is definitely a physically demanding task; Wang Changjiang and Shen Yan found it quite challenging to complete the autopsy of four bodies.

Moreover, there is still the subsequent autopsy report. Shen Yan worked overtime until over four in the morning to complete all the corresponding work.

In the cafeteria, Forensic Doctor Shen’s face clearly showed signs of fatigue, appearing slightly pale.

"Drink some milk to replenish yourself."

The food in the Criminal Investigation Team cafeteria is now considered the best in the entire Haizhou City Public Security Bureau. The breakfast is nutritious and healthy, with a variety of options like soy milk, fried dough sticks, tofu pudding, buns, milk, and noodles.

The lunch is abundant, with four cold dishes, eight hot dishes, and two soups, with a minimum of five meat dishes.

Dinner is simple yet delicious.

Speaking of the 100 million yuan donated by the Qiangsheng Group, the most beneficial thing for the team members is the cafeteria renovation.

When it’s time to eat, many people sigh with emotion, saying it’s really great to have money.

"I can’t drink anymore; I want to sleep."

Shen Yan pointed pitifully at her own face: "Look, I’ve stayed up so much that I’ve become a yellow-faced woman..."

Lu Chuan pinched her still resilient cheek: "That’s not true, my Forensic Doctor Shen is naturally beautiful. Here, have some braised pig’s trotters to replenish yourself."

"Hmm? Are you implying that I’ve gained weight? Calling me a pig?"

Lu Chuan: "..."

Did he mean that?

Although Forensic Doctor Shen seems to have gained a little weight recently, she’s still far from being considered fat. Eating pig’s trotters is supposed to replenish collagen, isn’t it?

"No, I didn’t mean that."

Lu Chuan shook his head like a rattle: "I meant collagen, pig’s trotters replenish collagen."

"Okay, then I’ll eat... one... two pieces!"

The cafeteria is very popular in the morning; most people didn’t go home last night.

In fact, people usually get used to coming to the cafeteria for breakfast.

Previously, the cafeteria of the Haizhou City Criminal Investigation Team didn’t serve breakfast, and dinner was scarce, only providing some instant noodles or fast food during overtime.

It’s not that the cafeteria chefs couldn’t get up to make breakfast, but the budget was so tight at that time; even ensuring one meal at noon was already good enough.

"How did it go on your side yesterday?"

Forensic Doctor Shen spoke while biting into a braised pig’s trotter: "No special findings; the chance of discovering clues from the autopsy is slim."

The autopsy of the bodies in this case was an ordinary one.

The bodies were freshly dead, only a few hours old, without any particular smell, and all the blood had drained, leaving a pungent smell of blood at the scene. However, once the bodies were carried back, there was no special odor.

The causes of death for the four victims are very clear, and there is no mystery regarding the time of death.

"You were right about one thing; we conducted a focused examination of the wounds on the bodies, and there were indeed burrs; the knife used was not very sharp."

Forensic Doctor Shen indeed worked hard yesterday, swiftly finishing off the braised pig’s trotter.

"My mentor has a meeting today, so I’ll go catch up on some sleep later. Your side still needs to conduct DNA identification comparison, right?"

Forensic Doctor Shen’s work is basically completed, having finished the autopsy and issued the autopsy report.

Shen Yan can take compensatory rest, but Wang Changjiang might have to attend the case analysis meeting later and won’t be able to rest for now.

As for Lu Chuan, there’s no need to say more; he has to wait for the blood samples to be brought back from the action team in the morning, then proceed with the DNA information comparison and await the results.

The best outcome would be a direct match, solving the case immediately.

If there’s no direct match, it will be much more complicated.

Zhang Hui and others set off early after a quick bite. Yesterday, the local police station had already notified everyone in the rental building not to go out today and to await the Criminal Investigation Team’s blood sample collection.

By the time Zhang Hui and others arrived, the local police station had almost completed the preparatory work.

In fact, when a murder occurs, the local police station is the busiest.

Because a lot of basic information needs to be contacted, investigated, and provided by the local police station.

For example, where do the detectives get the information and background checks on someone?

It must be from the household registration system at the police station. This is the first and most crucial source of information.

The richness of the household registration information system is beyond most people’s imagination.

In recent years, most of those handling household registrations at police stations are young university graduates, mostly women.

But it wasn’t like this in the past; when computer systems weren’t developed, those handling household registrations were mainly seasoned veterans of the station, possibly working there for decades.

They could tell you how many dogs each household had without using the system.

Now, those individuals are gradually retiring. The fast-paced life has made it harder for people to become familiar with each other, and the old methods sometimes don’t work as well, necessitating a more comprehensive and improved system.

Take the blood sample collection work this time, for instance; the local police station needs to have people ready in advance so the detectives can start working as soon as they arrive.

Of course, in reality, blood collection is done by professionals. The Criminal Investigation Team is collaborating with a hospital, inviting professional blood collection nurses over.

This blood collection involves a relatively small group, about twenty people from the seven families in the rental property.

When collecting DNA information from a larger group, everyone gets involved.

The local police, accompanied by others, go door-to-door collecting blood, leaving no one out, comparing data against the permanent and temporary residents.

At such times, villages, towns, communities, etc., need to cooperate.

When Zhang Hui arrived, it was already broad daylight, and the twenty or so people lined up to have their blood drawn in turn.

Meanwhile, Action Team One, led by Sun Jun, had already sent people to the bank to investigate the financial transactions of all personnel involved.

This task is relatively simpler; the Criminal Investigation Team sends an official letter, and the bank naturally cooperates.

The process is also straightforward, just checking these individuals’ financial transactions and bank statements.