The case briefing eting lasted for about an hour and a half.
To be honest, the work done by the Qinzhou City Criminal Investigation Team was extrely ticulous.
So doubts raised by the mbers of the major case squad were already thought of here, and they had been verified, but no useful clues were found.
"Does anyone have any suggestions for what’s next?"
"Director Li, let’s first go to the scene and take a look."
"Yes, let’s go to the scene first."
Lu Chuan nodded in agreent. Even though the scene was from a week ago, it still had high investigative value.
No matter how many photos the Qinzhou City Criminal Investigation Team took, it wouldn’t be as effective as seeing the scene in person.
The experts in the major case squad each had their own thods, and going to the scene was everyone’s first choice.
As for Lu Chuan, he might need to conduct a detailed second cri scene investigation.
Theoretically, it’s impossible for the killer not to leave any traces at the scene.
It’s just that these traces may be very concealed in so situations, and even if the killer intentionally cleaned the scene, there might be fewer traces remaining, but never none.
Li Donglin ant that the major case squad should have gone to the scene imdiately, as listening to a report on the scene would be more beneficial than anything else.
"Alright, Captain Qin, please arrange for the major case squad to be taken to the scene."
"Director Li, I brought so equipnt with when I ca over. It’s all in the car, so I’ll drive myself."
This ti Lu Chuan didn’t drive his own car; he used the team’s ten-year-old Land Cruiser.
The last ti he ca to Qinzhou to handle a case, he realized so equipnt was not fully available here, so Lu Chuan brought so portable ones over.
Otherwise, his cri scene investigation might be hindered.
"No problem, do you need us to send a driver?"
"No need, I’ll drive myself."
Half an hour later, at Qinzhou International Apartnts.
"This apartnt was completed five years ago and is considered a landmark building in Qinzhou. Its surveillance facilities are relatively well-established, but we checked everything and found nothing suspicious."
Outside the apartnt, after getting out of the car, Wang Song searched for surveillance positions on the building.
"Is there a surveillance layout and construction drawings of the building?"
"Yes, they are in the archives, I’ll have soone bring them over."
The apartnt property manager was very cooperative and seed quite experienced, having been assisting the Qinzhou City Criminal Investigation Team for a week.
"Our judgnt is still most likely that the perpetrator is soone within the apartnt building."
Qin Hui pointed to the apartnt entrance: "There are surveillance caras in the elevators, at the entrance, and in the underground parking garage and other public areas throughout the entire apartnt building. After committing the cri, it’s not likely the criminal could leave the surveillance range if they intended to escape."
"So after the cri, the perpetrator should actually be hiding within the building."
Wang Song nodded subtly.
Qin Hui’s analysis was very reasonable; being appointed as the head of the Criminal Investigation Team, he certainly wasn’t just a figurehead.
The Qinzhou City Public Security Bureau wouldn’t have soone clueless in this position.
"Additionally, none of Wang Min’s specific acquaintances entered or left the apartnt that day."
"Let’s head inside first."
Inside the building, there were four elevators.
"This apartnt is a tower structure, and all four elevators can reach the floor of the deceased’s residence."
With four elevators serving twenty-five units, the entire tower is constructed around these four elevators from an architectural standpoint.
The cri took place on the seventh floor, in apartnt 708.
"This floor houses eighteen units. The cri occurred at 9:30 pm on the 31st, and the soundproofing of the deceased’s room was average. However, the apartnt rented by Wang Min had no neighbors on either side."
"Everyone on this floor is our key investigation target, especially the six single males, but..."
No need to say "but," Qin Hui and his team investigated for a week, but no suspects were identified. It was evident that the individuals on this floor probably had no suspicion.
However, Qin Hui’s words actually contained a lot of information.
For example, whether the perpetrator acted impulsively or preditatedly when targeting the victim.
Killing soone often involves making noise, especially when involving coercion.
So, whether the perpetrator deliberately chose Wang Min and knew in advance that there were no neighbors renting on either side is crucial intelligence.
"How did the perpetrator enter the room?"
Wang Song asked another question.
"Not sure, but there was no trace of forced entry on the door lock. It is speculated that either Wang Min was deceived into opening the door, or the culprit used a key."
A mont later, the elevator stopped on the seventh floor, and everyone exited the elevator.
"The corner ahead is apartnt 708."
At this ti, Lu Chuan did not advance first, as the body had long been removed, and inside were traces left by the Qinzhou Criminal Investigation Team’s examination.
Many things were no longer in the state they were imdiately after the cri occurred.
"Here is where the blood flowed out at that ti."
The door was already open, and one could see that the threshold and the floor inside were on the sa level, which is why the blood was able to flow out of the room.
A week had passed, and the blood inside was no longer bright red.
Everyone present was an expert in criminal investigation, and they all had so research on bloodstain patterns.
Normally, blood from a human body coagulates about three minutes after exiting the body.
It changes from a bright red to a dark red initially.
The blood from the human body is not a simple composite; it consists of various substances such as water, red blood cells, and platelets.
It is precisely the existence of these components that makes blood research a very valuable clue in criminal investigation.
A week had passed, and the bloodstains at the cri scene had long coagulated, now even transitioning from dark red to black, and even brown.
The seven mbers of the major case squad each donned gloves and foot covers, preparing to enter the scene.
Lu Chuan, as the cri scene investigator, was the first to enter.
Bloodstain Pattern Analysis is one of the most critical ans of reconstructing the cri scene.
The dossier provided by Qin Hui contained descriptions of the reconstructed scene based on bloodstain pattern analysis.
There were spatter bloodstains on the wall next to the entrance, and traces of projected bloodstains remained on the floor.
The perpetrator injured the victim imdiately upon entering.
However, judging by the shape of the bloodstains and the amount of blood, the victim was not severely injured at the doorway.
Based on the forensic report in the dossier, the deceased had bruising on the face, and the perpetrator probably used a blunt object or a fist to hit the victim’s head imdiately after entering.
And used a sharp tool to chop, but no crucial parts were hard.
Walking past the foyer, the sa bloodstain patterns continued, including additional dripped blood on the floor.
"Drip height... less than one ter."
Blood can drip from different heights and will form drip-like stains, but the shapes of the droplets vary.
From around one ter or less, the edges of dripped blood are jagged.
But from beyond one ter to less than three ters, the edges of the droplets appear linear.
And when the height exceeds three ters, the fallen blood no longer forms droplets but rather appears dispersed.
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