Forensic doctors, who are a type of national forensic experts, are doctors.

Although the most common thing forensic doctors do is to dissect a cadaver, it is also indispensable to suture after the autopsy.

Therefore, surgical knots are also a method of suturing and tying knots often used by forensic doctors.

Because surgical knots are somewhat complicated to tie and are as strong as what we call dead knots, surgical knots are usually only used by doctors.

At the scene of the homicide, there were stitches on the body, and surgical knots appeared, and the knots were very skillfully knotted, and it did not look like an imitation for some purpose.

From this, it can be judged that the murderer is most likely a doctor or a forensic doctor.

This is not the strangest thing, what is even stranger is that after the murderer kills, why did he sew the body into a fist-like posture?

"Judging from the murderer's method of killing, he used a sharp blade to cut the carotid artery of the deceased. And visually, no other external injuries were found on the deceased's body. This method of killing is very clean, but why bother to stitch up the corpse so much? What was the purpose of the murderer? Ren Qiushi said slowly.

Anyone does everything with a purpose, and there is a scale in people's thinking, that is, the pay and the benefit should be proportional.

If the effort outweighs the benefit, few people will do it.

Just like this case, the murderer only needs to kill with a knife, but it takes time and effort to stitch the limbs of the deceased, and the murderer would never do it if it was not for a certain purpose.

"Why did the murderer stitch up the deceased?" Zeng Lan was very puzzled, she slowly asked this question, asked Ren Qiushi, and asked herself at the same time.

"The murderer sewed the deceased into a fist-like posture, there must be a purpose, could it be that the murderer is also a forensic doctor? And what does it have to do with people who are burned to death? Ren Qiushi opened his mouth faintly and gave his guess.

Then he asked, "Under what circumstances will the body be sutured?" ”

Zeng Lan immediately spoke: "When splicing corpses, sutures will be carried out, such as fragmented corpses and severed limbs. ”

Ren Qiushi nodded and did not continue.

The corpse in front of me is undoubtedly intact and does not need to be stitched......

The preliminary autopsy at the scene continues, and the medical examiner comes out to give the cause of death and, most importantly, the time of death.

The main joints of the deceased were all sutured and could not be opened for the time being, so Ren Qiushi gently broke the knuckles and shoulder joints of the deceased.

"The mortis is already very serious."

After Ren Qiushi finished speaking, he gently pressed towards the deceased's skull.

Ren Qiushi could clearly feel that the deceased's skull had collapsed and displaced, and at the same time, he could hear a relatively subtle bone fricative.

"There are signs of fractures in the skull of the deceased, and it is severe." Ren Qiushi said lightly.

In this way, the murderer first held a blunt object and hit the deceased in the head. The next step of throat cutting is carried out after the deceased has lost the ability to resist, but it is difficult to say whether the throat is cut or sutured first. Zeng Lan said with some hesitation.

The wound that cuts the carotid artery is very large, and it is very easy to judge from the condition of the wound flesh and the splattering of blood.

However, the wound of the needle is very subtle, and it is difficult to judge the life reaction by the wound condition.

The two forensic doctors were still conducting autopsies, and the technical team and the serious crime team were still investigating the scene. After walking around, I went back to the bathroom.

"Is the time of death certain?" I asked softly.

Ren Qiushi nodded, looked at me and said seriously: "The time of death should be more than twelve hours, and the specific time will have to wait until I go back for further autopsy work." ”

I thought for a moment and muttered in a deep voice, "Twelve hours, that's last night...... The downstairs resident found the water leak this morning, and the time was about the same. ”

"Anything else you found?" I fixed my mind and asked again.

"The main joints of the deceased have been sutured together, and the behavior of sewing them into a fist-like posture is very suspicious, and it is very likely that the murderer was a surgeon or medical examiner." Ren Qiushi stood up and said to me seriously.

"Okay." I nodded.

The initial autopsy at the scene has been completed, and the body will then be carried onto the body truck and taken back to the public security bureau's autopsy room for further autopsy.

"Alright, my work is done, let's withdraw first." Ren Qiushi took off his gloves, let out a long breath, and said to me lightly.

"Okay, I'll wait for your autopsy report." I looked at him and said with a smile.

"Don't worry, old rules, I ask the dead, you catch the dead." After Ren Qiushi finished speaking, he carried the forensic investigation toolbox and left the scene with Zeng Lan.

After sending Ren Qiushi and Zeng Lan away, the investigation work at the scene was also nearing completion.

Jiang Tingbai walked up to me and said to me: "Old Qin, the doors and windows have been checked, there is no trace of damage, the murderer should have entered the scene by using a key or knocking on the door." ”

There are no signs of damage to the doors and windows, which is the phrase I hear most often at the scene of the crime.

"It can't be another acquaintance committing the crime......" I let out a long sigh and couldn't help but sigh.

"There are no obvious signs of a fight at the scene, and the possibility of an acquaintance committing the crime is very high." Jiang Tingbai nodded and agreed with me.

I shook my head a little helplessly, because acquaintances committed crimes and no signs of a fight were still words I often heard when I was surveying the scene.

This is the case every time, but each time the dead and the way of killing are different, each time the murderer is different, and each time the murderer has a different motive for killing.

But the only thing that remains the same is vendettas.

Judging from the scene of the crime, the deceased was a 62-year-old woman who lived alone, her husband had died of illness, and no items used by men were seen in the house.

There were no traces of rummaging at the scene, indicating that the murderer did not kill for money.

A sixty-two-year-old man, the murderer will not be crazy enough to kill people, and the possibility of love murder is not very likely.

Then there is only revenge hunting, and this is another vendetta case.

But with whom can a sixty-two-year-old man make a feud? Or is it an acquaintance who committed the crime?

The deceased was a retired nurse, and Ren Qiushi mentioned that the suture knot on the deceased's body is a surgical knot commonly used in surgery, is it a grudge at work?

But she has been retired for many years, and the murderer has come back for revenge after many years?!

It's not very scientific, and she listens to her neighbors who are warm-hearted, get along very well with each other, and everyone treats her very well......

At this moment, Li Meng's voice suddenly came from the door.

"There's a discovery here!"

After hearing this call, we hurried towards the gate where Li Meng was.

At this time, Li Meng was squatting at the door, rummaging through the mats outside the door in his hands.

Just as we all leaned over, Li Meng suddenly lifted the mat.

There is a key underneath the mat.

It seems that this should be a spare key.

The technical team immediately stepped forward and wanted to collect the fingerprints on it, and if the murderer used the key to open the door, it would definitely leave traces.

However, there are no fingerprints on the key.

The technical team picked up the key and inserted it into the lock hole, and with a slight twist, the door lock turned.