If you put aside those horrible and disgusting corpses, then forensic science is actually a very interesting science. According to www.biquge.info deceased's shape, posture, external injuries, etc., the forensic doctor can even infer whether the deceased and the murderer knew each other.

Because most of the scars and the form of death can indicate how long the deceased and the murderer were alone in the end.

The longer this contact lasts, the more it means that they will not be completely strangers to each other. Of course, there is another possibility that this contact is long, and that is that the psychopathic murderer wants to break some kind of strange and unrecognized relationship and thus reach a kind of consensus with the victim.

However, almost half of this situation is not negotiable. And even if the negotiation is agreed, in the end, the victim will not be able to escape a dead end after all.

For example, 'L', when he stabbed Mu Sen, that time alone was just to get some kind of consensus. And the consensus he wants to reach with Mussen is to get Mussen to agree with and appreciate his death-killing/killing aesthetics. And this so-called "aesthetics" is based on the torture and killing of Mu Sen.

So it's ridiculous, and there is no reason to talk about it with a pervert/psychopathic murderer. No matter what you choose, the end result is inevitable death.

It's just that if you know the relationship between the murderer and the victim, you can start from the source of the corpse, so as to find the murderer.

Therefore, when Mu Sen looked at the drowning women in front of him, he was ready to let Mo Zidi's forensic science knowledge play an extreme role here. So, he asked Mo Zidi unceremoniously: "Zidi, let's talk about it, how long have these victims been in contact with the murderer?" Can you reconstruct the crime scene and get a rough idea of what they did in the end? ”

Mo Zitong thought for a moment, and then said to Mu Sen and Captain Wu: "I can only say that their time together is not short, but this is not necessarily the time they spend with the murderer. Usually the entire process of drowning is divided into six stages. When a person falls into the water, the sensory nerve endings in the skin are stimulated by cold water, which creates an instinctive reflex inhalatory movement. Inhalation can cause choking by drawing fluid into the airways, which can lead to apnea, resulting in a lack of oxygen in the body. This belongs to the first stage, the period of respiratory depression. This period usually lasts about 0.5 to 1 minute. I think that at this time, the murderer should be standing outside the water tank, looking at the deceased coldly and indifferently. ”

Mu Sen nodded and motioned for Mo Ziqi to continue.

"Due to the lack of oxygen, carbon dioxide is retained in the body, which stimulates the central nervous system and causes the person to start breathing again. However, at this time, inspiratory tachypnea/shortness of breath will occur first, and the faster you inhale, the faster a large amount of liquid will be inhaled, which will lead to more intense coughing than before. Then, due to the reflex, expiratory tachypnea/shortness of breath occurs, and a large amount of foam appears in the nose and mouth, which is called respiratory spasms. This lasts about 1 to 2.5 minutes. The process was painful, but the killer must have used some kind of instrument to drag the deceased out of the water at this time. Because on the neck of the deceased, some kind of pincer-like pinch marks are faintly visible. I reckon...... It should probably be something made by a murderer......" Mo Zitong said and stopped. He seemed to be thinking about how to explain to Musson what it looked like.

However, Mu Sen said very clearly at this time: "Needless to say, I understand." You're talking about the top that can be lassoed or clamped around the head of the deceased, and then the handle is self-made so that he can stand on the edge of the tank and torture the dying dead to his heart's content. Right? ”

"yes, that's kind of what it means." Mo Zitong continued: "Next, the murderer throws the victim into the water again, and the victim will reach the next stage --- loss of consciousness. This is the period of loss of consciousness. This time is not too long, only a few seconds to tens of seconds. The deceased will gradually lose consciousness, lose all kinds of reflex functions, dilated pupils, incontinence, etc. ”

Mo Ziqi paused, sighed softly and continued: "Then there is the apnea period, at this time the deceased's consciousness will be completely lost, and it will last about a minute. Then there is the end-respiration phase, after a short number of breaths, continue to inhale a large amount of drowning fluid, which lasts for about a minute. Finally, it's time to stop breathing. At this time, the victim's breathing has completely stopped, but the heartbeat may still beat slightly, and if it is rescued in time at this time, there may be a possibility of survival. But apparently, they didn't have that luck. ”

Mo Zidi, who was calm and indifferent on the surface, also had a little heaviness on his face after saying this. The same people, the more they see through life and death, the more they will discover the fragility of life and the impermanence of fate.

Mu Sen tilted his head, pondered for a moment, and then said slowly: "That is to say...... Although the whole drowning process of a person is divided into six periods, the overall time is only about five minutes......

"Yes, so to speak. However, the length of each period of drowning also varies according to age, constitution, mental state, personal water nature, and the nature of drowning. Mo Ziqi added.

But at this time, Captain Wu on the side suddenly smiled bitterly and said: "Let's not talk about the age and physique, let's just say that the water here can choke people to death!" Smoking can smoke people to death! What's more, can the psychological condition of the person who was killed be better? I don't think the whole process of death for these dead people will take more than five minutes. ”

As soon as Captain Wu finished speaking, Mu Sen decisively denied it: "Team Wu, you are wrong, these women, their drowning time may not be five minutes, but it can never be shorter, it can only be longer." Maybe...... Fifty minutes, perhaps, fifty hours ......"

"Fifty hours?!" Captain Wu's eyes widened in shock! Then he looked at Mo Ziqi incredulously, because it was clear that he had just finished speaking, and the total process of drowning was only five minutes. Why was he overthrown by Mu Sen in the blink of an eye?

Seeing Captain Wu's surprised appearance, Mu Sen opened his mouth to explain: "Team Wu, Zi Di has just said that that pervert/metamorphosis gave the deceased a chance to breathe in the first period of drowning. He used a long-handled instrument to help the deceased rise to the surface for a short breath so that he would not die quickly. When she finally got out of the second period of drowning, he pressed her down again......"

Captain Wu's eyes widened, and his gaze was full of disbelief and incredulity.

At this time, Mo Ziqi said lightly on the side: "This is the same way until the entire drowning process of the deceased is stretched to the longest time limit." ”

"His grandmother's! Isn't this a brute! It's not okay to drown, you have to torture for dozens of hours?! Captain Wu angrily scolded a foul word! Those eyes radiated the "light of anger" that represented justice......

"If that's what you say, then what is he, what is he? Fifty hours without sleep, isn't that bastard tired himself?! Captain Wu paced back and forth irritablely, and it could be seen that he was very emotional at the moment.

But Mu Sen replied frankly and truthfully: "I haven't thought of the reason ...... yet."

Ever since Mo Ziqi told the time of drowning, Mu Sen had already begun to speculate. The murderer did this with great effort, and went to great lengths to get the drowning hand and foot cover, what was he for? Is it just to prolong the drowning time just so that the deceased can experience the fear and helplessness that life is worse than death?

It's not hard to imagine that when a person falls into such a tank, all around is disgusting rancid black water, and it is bottomless. How desperate and panicked it must be, that fear, I am afraid that it cannot be expressed in words. Especially when you have choked on water, your survival instinct will be eager to grab whatever you can get. That's why there are deep nail marks left in the tank.

And at such moments, something like a life-saving straw appeared. The killer stood on the edge of the water tank and used the special device to help the victim breathe for a short period of time. Think of that woman who is born again, who will breathe desperately and then desperately cry out for help.

But of course, the consequence of her doing so was that she was pressed into the water again......

Such a cruel picture of killing/killing had already been formed in Mu Sen's mind. It's just that Mu Sen and Captain Wu don't understand the same thing, the longer it takes to drown the dead, the more tired the murderer will be. If you catch up with a person with a strong will to survive, it is not easy to say that you may take advantage of the weakness to escape.

After thinking about it, Mu Sen felt that there was still only one possibility. Linked to the killer's past trauma. His trauma may be water, or the fear of drowning, or everything that has to do with water. In short, it is now almost certain that the murderer's trauma has something to do with the abandoned boiler factory, or rather, the fire fifteen years ago.

Before he had time to explain, Mu Sen urged again: "Captain Wu, we really don't have much time, you have to give me an answer tomorrow, I want all the information about the explosion fifteen years ago, and all the relevant people involved at that time." ”

Seeing Mu Sen's urgent appearance, Captain Wu was also anxious, and he immediately called back to the team, asking the team not only to check all the archives, but also to dig out the old police officer and ask. Sometimes, rumors are more reliable than archives.

It is not an easy task to check the archives of fifteen years ago. Especially if it's still an unsolved case, there shouldn't be too much information. But there is no way, everything that happened fifteen years ago is directly related to whether Mu Sen can catch the murderer. In other words, it is related to the first meeting between Moussen and L, who wins and who loses.