At three o'clock in the morning, the criminal investigation detachment.

Su Ping picked up a cigarette, walked to Qi Yuan's side, and patted him lightly on the shoulder.

"Huh? What's wrong? Qi Yuan woke up instantly, but his eyes were still half-open, and he asked in a slurred and confused manner, "Is there a situation?" ”

"What can happen?" Su Ping rolled his eyes and said, "If you can't stay up, go back to sleep, what are you doing here lying on your stomach?" Don't want your waist? Don't do whatever you want when you're young, wait until you're old......"

"Uh......" Qi Yuan finally came to his senses, and asked with a confused expression: "Team Su, didn't you call me over?" ”

Su Ping: ......

After the criminal police returned to the detachment, Su Ping asked everyone to rest, leaving Qi Yuan alone, letting him sit in on the discussion of the case with Xun Mu, and let him learn how to look at the whole case from a macro perspective, instead of just grasping a certain point.

Just chatting and chatting, it reached an impasse, and then there was silence for a while, and when I looked back, it was late at night, and Qi Yuan fell asleep on the side......

"Alright, nothing special, you can go back and rest." Su Ping's face was a little unbearable, and he couldn't say it clearly, so he waved his hand and drove people away.

Qi Yuan blinked, nodded, said goodnight, and left the office.

"Whew," spitting out the smoke, Su Ping snuffed out the cigarette butt and said, "Okay, let's not waste it here, the clues are insufficient, and it's useless to break your head."

This case should not be difficult to solve, the murderer has too many actions, which means that there are many openings that can be used as breakthroughs, as long as you check down the vine, when the time comes, the case will be solved, and the mysteries that we have a headache now will naturally be solved. ”

"I know." Xun Mu nodded lightly and said, "But one of the joys of being a criminal policeman is not to fight wits and courage with the murderer and solve riddles?"

Although it is said that we don't need to be led by the nose by the murderer, catch people, lock the evidence, interrogate, these mysteries can all be solved.

But that's not interesting, it seems that our IQ is lower than that of the murderer, and there is no technical content at all. Anyway, these mysteries, I don't want to come up with an explanation that can at least stand up, so I scratch my heart and liver so uncomfortable that I don't want to sleep. ”

Su Ping rolled his eyes again: "You are young!" Alas, it's good to be young, and you can still enjoy the process of reasoning, like me, you will only have a headache and annoyance. ”

"You've been through too much, and you've encountered everything, so naturally you don't have a new feeling." Xun Mu re-lit a cigarette and said with a smile: "But......

You're still interested in this case, right? Otherwise, I wouldn't have survived until now. After all, there are not many opportunities for this so-called supernatural event. ”

"The fart supernatural event, the technique is inevitably too rough." Su Ping said: "There are so many supernatural events on the Internet, and there may not be any ......."

"The prototype of those online incidents may be rougher than this case." Xun Mu interrupted him and said: "It's nothing more than a false rumor, and slowly there will be a clear eye, after all, in the process of rumors, many things that sound unreliable will be subconsciously and slowly come up with an explanation."

As for the core places, heh, you talk to the supernatural about logic? Isn't it illogical to be called a supernatural event? ”

"Alright, leave this mess alone." Su Ping waved his hand: "In this case, there are only two key mysteries, one is that the girl turned on the water and fought for nearly two hours, what is going on?"

On the other hand, when the five girls ran upstairs, why didn't they call? Or is it called but no one hears it? How is this done? ”

Xun Mu smiled bitterly and shook his head gently.

When Qi Yuan was still there before, although they were discussing the case itself, they were talking about it, and it was inevitable to talk about these two mysteries in the end.

Then they both fell silent.

Then Qi Yuan fell asleep.

If it weren't for the fact that the modus operandi of the perpetrators were still relatively rough, they would have been able to do it well, would there really be any supernatural incidents.

"First of all, the girl who turned on the water should be fine." After a few minutes, Xun Mu reopened his mouth and said: "After staying in the boiling water room for two hours, this flaw is too big, if she is an insider, or also participated in the planning of this murder, it stands to reason that she will not use this method to avoid it." ”

"Yes." Su Ping also said: "Although I also suspected her before, but think about it carefully, if she is really an insider, if she wants to avoid suspicion or something, going out to eat, dating her boyfriend, and going to the library to read books, which is more reliable than going to the boiling water room to turn on the water."

But here's the problem, if she wasn't involved in this case, how could she stay in the boiling water room for two hours like a ghost? Could it be that you are sleepwalking?

Hey, I've only heard of sleepwalking when I fall asleep, but I haven't heard of suddenly falling asleep and sleepwalking when I'm awake, which can't explain it. If there is a problem with the boiling water room, there are many girls who have been to the boiling water room during this period, and they have not seen this kind of thing. ”

"Forget it, let's go to the hospital early tomorrow morning and ask the doctor about the examination report or something." Xun Mu rubbed his temples.

Another mystery, in the process of the girl moving from the dormitory to the rooftop, why did she not make any movement, and she had no clue, the two looked at each other, and they both felt irritated, and their eyes quickly separated, and they both had a tacit understanding not to mention this stubble.

After waiting for a while, news finally came from Yan Zhongxin's side, and the autopsy work was almost over.

The two of them came to the spirit and immediately ran to the basement floor to dissect the laboratory.

"As far as the cause of death is concerned, there is no doubt," Yan Zhongxin said: "The four girls either died of traumatic shock caused by the rupture of internal organs, or died of hemorrhagic shock caused by excessive bleeding, all of which were caused by primary injuries and did not involve anything ghostly."

In addition, since the time of their death was not long after we arrived, the corpses had not yet been generated, and many clues were preserved, from which we can see a lot of things.

The most important point is that they were all greatly stimulated before their deaths - one of the girls also had a local corpse spasm.

But then again, not to mention the murderer's chatter, the killing of people with a knife is a huge source of stimulation for the victims, how many people can not be nervous or afraid in the face of this kind of thing? So this finding is actually of little practical significance. ”

"So what could be considered an important discovery?"

"Two points," Yan Zhongxin stretched out two fingers: "First of all, the genetics laboratory extracted a total of three different DNA from the dander tissue between the fingernails of several girls, which can be determined to be male, but there are only two sets of suspicious footprints at the scene, which is suspicion one;

Secondly, a set of DNA is consistent with the severed finger DNA found in the dormitory, which is somewhat intriguing, why did the murderer leave his severed finger in the girls' dormitory? ”