The professional quality of the male protagonist

If you really want to talk about it, a large part of the reason why these people suspect that the murderer is a vampire is because they can't find traces of the other party's appearance and departure.

A person who comes and goes without a trace, coupled with the characteristics of blood-sucking, doesn't look like a normal human being.

Everyone was lost in thought. They still couldn't understand how such a person disappeared. Even if the surveillance video here is bad, the surveillance video downstairs is good, and the other party wants to leave here. No matter what, you have to go out through the downstairs door. After the police intervene, there is almost no possibility of climbing over the wall...

"Look up some technicians in charge of this community, especially those responsible for cleaning and some water and electricity maintenance." Li Yancheng's mind turned quickly, eliminating all the impossible, and finally the rest was left Even if it is a horror, it is true. After sending out all the people who might be eye-catching, Li Yancheng thought of this possibility.

"I remember that the previous information showed that there are three people in charge of sanitation in the community." Zhang Xuan immediately remembered one thing, "This community is specially hired to be in charge of sanitation, and there are special people in charge of cleaning in areas such as corridors and yards. When I read the information before, I remembered that there were three people in charge, one was mainly in charge of the yard below, the other was in charge of removing all the garbage here, and the other seemed to be in charge of the sanitation of whose house?"

What Zhang Xuan said was a little uncertain, because he hadn't noticed this before.

"Generally speaking, such a place will have a dedicated domestic service center." An Xiang interrupted at this time, "Most people will not stay in your home by themselves, but choose to let outsiders come."

"Housekeeping service center?" Zhang Xuan obviously hadn't thought of this aspect. Most people in the house choose to do housework by themselves, at least in his house.

At this time, An Xiang said again: "Yes, the people living around here are busy people, and there are many lawyers and judges. I have the impression that many of my former colleagues hired housekeepers because they didn't have much time. At home, it’s okay if you have a family, and someone in the family is responsible for this aspect, and the clothes in the family without a family can be piled up into a mountain. When I was studying, the dormitory was like this..."

Hearing An Xiang's words, Zhang Xuan couldn't help but feel black lines. He couldn't imagine what kind of life An Xiang lived when he left them to study abroad for a few years alone.

"If it's someone from the domestic service center, then everything makes sense." Xie Wenyuan quickly made up his mind, "The first one has something in common, the one has time to commit crimes, and the third one they can easily avoid everyone Pay attention and not be suspicious."

Because even if such a murder case occurs, these domestic service workers will still go to work, and will not stop going for this reason.

But these people will not be suspected at all, because they are responsible for taking out garbage and cleaning every day, even if they leave here with a few big bags, those people will only be surprised.

"Check the alibi first." Li Yancheng said.

Although he didn't know why, Li Yancheng always felt that something was wrong.

Those people in the domestic service center did have the time and conditions to commit crimes, but Li Yancheng felt that this might not be the case.

I can't say why, but Li Yancheng thinks that the puddle of water should be the focus.

After the work was assigned, several people dispersed again, but Li Yancheng did not leave immediately, but stayed at the crime scene.

Aman held the camera and took pictures of the water marks on the ground, while Li Yancheng stood aside and stared at the water marks in a daze.

Seeing that Li Yancheng had no intention of leaving, Aman waited for me to speak and said: "This guy is very careful, it can be said that he has done everything well."

Li Yancheng was stunned before he realized it. He looked around. The house was indeed very clean. If the other party hired a housekeeper, then it should be done after the housekeeper finished cleaning, or the housekeeper After doing the killing, he did hygiene by the way.

And Oman also said before that they found that the trash can at the scene was missing.

"Have you seen the corpse?" Oman asked again.

Li Yancheng nodded. He had already seen him last night. The victim died very quickly. After being hit hard on the back of the head and unconscious, he was hung upside down, and then his throat was pierced with a sharp object, resulting in a rapid loss of blood.

"I have already gone to see the previous corpses. Although I haven't had time to make a detailed report, the murderer's modus operandi has become more and more proficient. At the beginning, he was not easy to kill. The first corpse He was disembowelled, but the wound on his abdomen clearly showed that he might have lost his strength, resulting in a large number of cut marks on the wound when he was disemboweled."

"The second corpse was much better. The murderer didn't disembowel him. Instead, he chose to manipulate his arteries, cut his wrist, and then took blood."

After a short pause, Aman said again: "I have seen all the corpses in the back. Basically, his purpose is more obvious, and it is completely flushed with blood."

Li Yancheng knew about this, he had already discovered it when he read the autopsy report.

Generally speaking, the best way to get the most candidates is to use a machine to extract people while they are alive.

Because once the human body loses power, once it dies, the blood in the blood vessels will no longer flow, and it will be very difficult to get the blood out.

And over time, the blood will start to coagulate, causing the blood vessels to clog and making it more difficult to remove.

At the beginning, the other party didn't know about the method of disembowelling the victims. It was probably because this method failed, so he began to focus on the blood vessels.

"The last time he used a catheter. When the opponent was in a coma, he hung him up and then inserted the needle of the catheter into the opponent's aorta while the opponent was still alive. Because it was an artery, and it was head down, so the body The blood inside gushed out immediately and flowed down the catheter, and this method is very conducive to bloodletting, and it will drain 80% of the blood in the body in a short time." Oman made a quick movement, "I I don’t know if you have seen this scene, but many places use this method when killing pigs.”

In some places, pigs are slaughtered for their own consumption, and more blood is released when the pig is still alive, and then the other party dies.

In this way, the blood is not easy to stay in the body, and it is more convenient when the belly is cut open.

"More importantly, this method is clean enough." Aman said.

He didn't have much experience in killing pigs, but he had done similar things before when he was studying medicine.

So he has a lot of experience in how to let these animals die, and after becoming a forensic doctor for no reason, he has been exposed to such things more often.

Seeing the last victim's body here, Oman couldn't help but feel a little amazed, the murderer's technique was considered perfect.

It was clean and neat, except for the wound on the back of the head that knocked the victim unconscious, this time the technique was almost as good as that of a forensic doctor.

"You mean that the other party is likely to have medical knowledge?" Li Yancheng asked.

"I'm not sure, but judging from the modus operandi at the beginning to the modus operandi of the last case, the other party obviously learned quickly, even a bit too fast." Aman said.

There must be a step-by-step process to do anything, and the same is true for killing people.

From the very beginning to now, although the opponent has killed a lot of people, the time is only two months. It is unbelievable that the opponent can achieve the current level in two months.

Li Yancheng nodded, which was indeed somewhat surprising.

The initial modus operandi can clearly be seen that he is not proficient in this skill, and even a little clumsy, but the subsequent modus operandi makes it obvious that he is making progress, and the speed of this progress is very frightening.

After standing around the crime scene again, Li Yancheng left full of doubts.

Just before reaching the door, Oman's voice came again.

"Oh, by the way, the murderer should have taken a shower in the bathroom here before he left. So he should have changed clothes when he left. The washing machine has been used, and the residue left under the washing machine There was blood in the water stains, which belonged to the victim," Aman said.

Li Yancheng narrowed his eyes slightly when he heard the words, Aman meant that the other party stayed to take a shower after the murder, and then left after washing his clothes? ?

After taking a shower and leaving, Li Yancheng could understand that many murderers had this habit, and it was also one of the necessary ways to avoid being suspected after they went out.

But most murderers are reluctant to stay at the crime scene for long, because it may lead to their discovery at any time.

As for clothes and other things, many people will choose to discard or burn them, and some people will choose to wash them, but even if they wash those bloody clothes, they will definitely take them home and find a place away from people's eyes. Borrow the other party's washing machine at home and wash it before leaving.

Li Yancheng was interested in this case from the very beginning, but now after hearing what Aman said, his eyes lit up slightly, and he was slightly excited.

Is the main purpose of the other party doing this because he is too courageous, I believe that no one will knock on the door at this time to find out his identity, or is it purely because he can't take his clothes home to wash...

After two very different possibilities, there are also two very different states of mind.

The former is enough to see the mental state of the murderer, while the latter makes Li Yancheng have a lot of reverie.

If it's the latter, if there are other people living in the other party's family, how exactly do they deal with the blood that was taken away?

Once the blood is not put into the freezer in this weather, it is likely to stink in a few hours, basically ruling out the possibility of hiding it outside.