"Are you sure that the owner of the finger is one of the perpetrators?"

"What's wrong with that?" Yan Zhongxin's eyes widened: "DNA test results, how can it be wrong?" ”

"No," Su Ping hurriedly said: "I didn't mean that, it's just that there are fingerprints of the owner of the severed finger in the fingernails of the deceased, can you really be sure that everyone with the severed finger appeared at the scene?" ”

Yan Zhongxin was stunned.

That's a bit of a twist.

But fortunately, with many years of work experience, Yan Zhongxin immediately understood what Su Ping meant.

He hurriedly turned back to the dissecting table, took a magnifying glass and looked at the hand of a deceased person for a long time, then smeared something on the deceased's wrist, looked at it carefully for a while, and then pasted something with the shape of transparent glue, then tore it off again, stuck it on the slide, and observed it under the microscope for a while.

After a while, he walked back to Su Ping's side, shook his head and said, "It can be determined that the dander tissue in the fingernails of this deceased was scratched by herself when she desperately resisted when she was killed."

In the cracks of the nails, no epidermal damage and rupture of subcutaneous microvessels were found, so it can be seen that the murderer did not clean the cracks of the deceased's nails after committing the crime, which should not have been expected.

In addition, the deceased's epidermis is tight, local corpse spasms, and the hand is claw-shaped, in this case, if the murderer has ever grabbed the deceased's hand to scratch someone's skin, it will definitely leave marks on the wrist, including indentations and sweat and oil secreted by the fingers.

In a word, the skin in the fingernails of the deceased was scratched by her, at least to prove that the owner of the severed finger was present when she was killed. ”

Yan Zhongxin knew that although the two of them knew something about forensics, they knew too superficially, and most of them were summaries of experience, so this passage was as straightforward as possible.

"If that's the case, will the death of these girls have something to do with this severed finger?" Su Ping asked, "The murderer has a grudge because they broke a finger?" ”

After a pause, he asked again: "How long has it been since the finger was severed, have you found out?" ”

"It's hard to say for now." Yan Zhongxin shook his head: "I have done a section observation and found that the cell membrane of the finger is seriously damaged, and it is speculated that the cell structure is destroyed by freezing - the cell membrane is filled with cytoplasm, mainly liquid components, and the volume of water will become larger when it freezes at low temperature, breaking the cell membrane."

In this case, it is a little difficult to push out the breaking time with just one finger, and you can only guess from the ion concentration and water loss. ”

"Anything else?" Xun Mu asked again.

"Nope." Yan Zhongxin said: "The investigation report of the toxicology laboratory has also been sent before, and there is no tendency to poisoning, and all indicators are normal. If you want to conclude from the autopsy why they didn't call for help, I'm afraid you'll have to disappoint you.

I also dissected their necks and observed the vocal cords and surrounding tissues, and there was no congestion, which also ruled out the possibility that they had problems with their body functions and lost their voices.

Obviously, there should be other subjective reasons for their silence.

Of course, when people are extremely frightened and greatly stimulated, they may indeed have numbness and sluggishness in their hands and feet, unable to move or make a sound, which is a bit similar to nightmares, which is a kind of irritating, transient, and transient hysteria.

But the situation of five people at the same time is also untenable, not very reliable, and the possibility is very small. What's more, they can still run and jump, and they can move to the top of the rooftop, and it stands to reason that they won't be unable to make a sound.

Not to mention, even if it is hysterical aphonia, everything else is normal, and the vocal cords and surrounding tissues should be congested under the influence of hormones and nervous system. ”

"That's weird." Xun Mu was puzzled: "What kind of situation can make them ......?"

Su Ping had an idea, and suddenly thought of a possibility, interrupted him, and said, "Could it be that our guess is wrong at the root?" ”

"Oh?"

"They weren't scared away or caught up on the rooftop, they were tricked!" Su Ping said: "Even when I went up, a cadre of people still talked and laughed? The so-called supernatural events, except for a girl who took boiling water in the boiling water room for more than two hours, all happened after they left? ”

Xun Mu was stunned for a moment, and heyed: "Don't say it, it's really possible!" If that's the case, the mystery is solved! ”

Yan Zhongxin opened his mouth and asked softly, "Do these girls leave without closing the door?" ”

"Isn't there a girl out there turning on the water?" Su Ping said: "Besides, it's too simple to open the dormitory door without locking, a piece of hard cardboard is inserted through the crack in the door, and it is done with a pull and a push." It doesn't take half a minute to be proficient, it's not skilled, and you can try your luck to open it after trying a few more times. ”

Breaking through this blind spot, the knot in the chest of the two was untied, and they were in a good mood.

Although this guess is not necessarily correct, the probability is not low, and then you just need to find a way to prove it or prove it.

And if the guess is correct, it can further show that the perpetrator, at least one of the perpetrators and the victim know each other, and the relationship with each other should be good.

Then the scope of the investigation is much smaller.

After asking a few more questions to Yan Zhongxin, the two left the dissection room satisfied, and went back to the duty room to rest.

The next day, early in the morning, I went to the public opinion department to inquire about the news.

Although there are public security officials and other officials who have intervened and paid attention, the death of the five autocratic nursing students of Yuqiao Health School is still inevitably spreading, and it has been adapted by countless melon-eating people.

This is just a night's work, and if public opinion continues to ferment, the impact will only be greater, and both the health school and the public security will have to bear great pressure.

In today's era when online information is so developed, it is obviously not feasible to force public opinion, even if the hot search is withdrawn and the post is deleted, the matter will spread quickly, and it is difficult to control it thoroughly.

Therefore, the only way is to solve the case as soon as possible and announce the truth.

Fortunately, there is no new situation in the school, and the entire health school has been under the control of the police last night, although there is no restriction on the entry and exit of personnel, but everyone who enters and exits must be registered.

It is believed that the perpetrator should still be blocked in the school for now.

After a simple breakfast, Xun Mu once again summoned all the investigators, and while heading to the health school, he used the walkie-talkie in the car to arrange tasks for the investigation teams.

As soon as they arrived at the health school, Brother Song, who had been staying in the school, reported a summary report to them at the current stage.