This is a case of serial murder.

The two deceased who have appeared so far were both former obstetrics and gynecology staff at Sanhe County People's Hospital.

Xu Yufen, 62, is a nurse.

Liang Dongsong, 69, is a doctor.

They were all severely wounded to their skulls by the killer with a blunt instrument with a strip-like club, and then sewn the deceased into a fist-like posture after being burned.

All of them are medical sutures, and they are all tied surgical knots.

The only difference is that Xu Yufen's left neck has an extra sharp blade wound.

Liang Dongsong's body was abandoned in the running water tank of the residential building on the roof of the building, and was found by the staff who came to repair it today.

And we are now at Liang Dongsong's house, which is the scene of the first crime.

But strangely, Liang Dongsong's blood-stained clothes were gone.

The technical team is conducting a careful investigation of Liang Dongsong's home, but it should not find any clues, because judging from the splattered blood stains at the door, the murderer stood at the door and did not enter the room at all.

After a while, the technical team gave me an answer.

It's an answer I've heard a lot, and even if I don't say it, you can guess - there is no sign of the door being broken.

With Xu Yufen's experience, we carefully searched for a place at the door of the crime scene where we could hide the spare key, but we did not find it, and we do not rule out the possibility that the murderer took the spare key away.

"I don't think the killer used the spare key at all, and if the killer used the key to enter the room, the place of the murder should not be at the door, but inside the room." Lin Zifan, who was beside him, said seriously.

I nodded, agreeing with him, and then I said in a deep voice, "It should have been committed by calling the door, which is very consistent with the situation where the deceased was killed at the door." ”

After I finished speaking, I added: "And the murderer and the deceased should know each other, if it were not an acquaintance, the deceased would have seen the murderer through the door mirror, and he would not have opened the door." If the door mirror is blocked, it will not open the door. ”

Just when I deeply believed in my restoration of the scene of the crime, Ren Qiushi, who was beside me, suddenly spoke: "The murderer did not enter the room by calling the door. ”

I was so surprised by what he said that I immediately asked, "Why?" ”

Ren Qiushi looked at me and explained lightly: "The deceased's skull was injured in the back of his head, if the murderer entered the room by calling the door, then the murderer and the deceased should have been standing face to face at that time." In this position, if the murderer wants to inflict a fatal blow on the deceased's head, he will only cause a skull injury to the forehead, just like Xu Yufen, not the back of the head. ”

I froze and said with some puzzlement: "If it is an acquaintance who committed the crime, then the deceased will have a movement to turn away after opening the door to the murderer, which will also cause skull damage to the back of the head." ”

Ren Qiushi shook his head again, he slowly took a step forward, pointed to the shoe cabinet at the door and the splattered blood stains on the wall and said, "If it is the kind of situation you said, these blood stains must be at least one or two meters from the door to the interior, and they will not appear so close to the door." ”

After speaking, Ren Qiushi pointed to the blood-stained footpad on the ground and said, "This is the place to change shoes, will the deceased turn around in the place where he changed his shoes after opening the door to the murderer?" ”

After listening to him, I nodded thoughtfully, and he was right, all this is indeed a bit counterintuitive.

I pondered for a moment, thinking about what would happen after the deceased opened the door to the murderer before turning around here.

"Tailgating."

Immediately after, Ren Qiushi's voice sounded.

These two words, like a flash of light in the dark night, woke me up in an instant.

"That's right! Tail! If the deceased opened the door and entered the room to change his shoes, the murderer suddenly attacked from behind, it would have caused such a close spurt of blood! I slapped my face and said loudly as if I had been empowered.

"Not only that, the deceased must know the murderer, otherwise the murderer will definitely be discovered after such a close follow-up, and the deceased will definitely be on guard." Ren Qiushi said in a deep voice.

"Another acquaintance committed the crime, the murderer knew Xu Yufen and Liang Dongsong at the same time, and the two deceased both worked in the obstetrics and gynecology department of Sanhe County People's Hospital...... And the identity of the murderer is a doctor, could it be that the murderer is also a staff member of the Department of Obstetrics and Gynecology of Sanhe County People's Hospital? ! As I spoke, I let out an exclamation.

Although it is very likely that the murderer is a colleague of Xu Yufen and Liang Dongsong, what about the motive for the killing?

It is impossible for Xu Yufen and Liang Dongsong to make a feud with the murderer at the same time, and the two deceased are both sewn into a fist-like posture after being sewn into a fire.

It should all be related to the fire 40 years ago.

"Team Qin, Li Meng found the deceased's clothes in the garbage heap downstairs." At this moment, Xue Hang walked up to me and said to me.

I frowned and hurried downstairs to the garbage heap where I found my clothes.

On the ground next to the garbage dump, there is a black plastic bag, which contains Liang Dongsong's blood-stained clothes.

Li Meng and two criminal policemen stood aside, waiting for us.

"Xiaomeng, it's good, this is the key physical evidence!" I gave Li Meng a thumbs up and was about to crouch down to check the clothes in the black plastic bag.

The police officers of the technical team on the side first took photos of the black plastic bag for evidence, and then took photos from time to time when we checked the clothes.

The technical team took out the clothes in the black plastic bag and spread them on the ground, which consisted of a dark blue tracksuit, a white undershirt, a brown belt, a pair of underwear, a pair of socks, and a pair of sneakers.

The rest is some personal belongings, keys, wallets, mobile phones, toilet paper and other things.

There is also cash in the wallet, and there is also a mobile phone, all of which shows that the deceased did not kill for money, but simply and directly sought revenge.

The clothes were stained with blood, and judging from the situation at the scene and the style of the clothes, it was indeed in line with the dress of a sixty-nine-year-old middle-aged and elderly man.

After the technical team took pictures, they put the clothes into the evidence bag and prepared to take them back for bloodstain examination to further confirm whether the bloodstains came from the deceased Liang Dongsong. and whether there are any clues to the murderer left on the clothes of the deceased.

"After the murderer, the killer laboriously hid the body in the running water tank, but left the clothes in the garbage bin. Is the murderer afraid that the body will be found, or is he not afraid of the body being found? I looked at the trash can next to me and fell into deep thought.

This was very strange, but Li Meng didn't seem to be surprised at all.

"It is clear that the murderer was not afraid of the body being found at all. Because even if the murderer hid the clothes of the deceased in a more hidden place, the body was soaked in the tank and could be found in a short time. And I think the murderer desperately wants the body to be found, after all, the sutures on it are his masterpiece, and he just wants to express something to the police through his own way of killing. However, we don't know exactly what it is, and there is the most important point. Li Meng said as he spoke, suddenly pausing.

I hurriedly asked, "What's the most important point?!" ”

Li Meng settled down and said slowly: "The most critical point is that sooner or later, the body will be found, but it will not be found so soon. What the murderer needs is this short time difference of a few days to commit the crime again......"