Seeing several policemen stop at the same time, the administrator's aunt was stunned for a moment, and looked at several people in confusion: "Comrade policeman, there is ...... Any questions?"

Gu Chen didn't speak, he blocked the old aunt behind him, and made a silent sign language.

At the same time, Officer Wang and Officer Ding each took out police pistols, and Lu Weiwei and He Junchao each took out a contraction baton.

Gu Chen took out the tear gas jet from the nine small pieces of equipment, and a handsome spinning air throw was firmly in his hand.

"Do you smell it?" Gu Chen asked in a low voice.

"Smelled. Lu Weiwei nodded.

Officer Wang, Officer Ding and He Junchao also nodded one after another.

Only the administrator's aunt was a little confused, and she hurriedly pulled the corner of Lu Weiwei's clothes, and asked in a low voice, "Smell ...... What do you smell?"

"The smell of blood. Lu Weiwei said.

"Blood...... Smelly of fishy?" the administrator's aunt heard the smell of blood, and suddenly the whole person was frightened and took a few steps back.

She quickly hid around the corner of the stairs.

Lu Weiwei took the key given by the old aunt and stuffed it to Gu Chen, who slowly inserted it into the keyhole and twisted it gently.

With a "click" sound, the old wooden door was twisted open in an instant, Gu Chen dodged, Officer Wang and Officer Ding kicked the door open at the same time, and the two rushed in with pistols one after another.

"Don't move!"

"Police. ”

The whole room was filled with noise, and everyone broke down the door, but suddenly it quickly fell silent.

When Gu Chen came to the room, he found that a thin man was lying on the ground at the moment, and there were blood stains all under his body.

The blood that flowed out of it congealed into a large patch of blood on the rough concrete floor, which stretched all the way to the vicinity of the doorway.

It's no wonder that everyone who has this natural sensitivity to blood still sniffs out the problem in the first place.

Since the blood had long since congealed, it was emitted in the air, giving people an unpleasant nausea.

Gu Chen hurriedly put away his equipment and put on white gloves to check the identity of the deceased, at this time Gu Chen found that the deceased was exactly the same as Zhang Lai who everyone had been looking for in the photo.

The decadent long hair, the untrimmed stubble, and the haggard face are basically in line with Zhang Lai's characteristics.

In addition, this is the room rented by Zhang Lai, so it is correct that the deceased is Zhang Lai.

Lu Weiwei exhaled heavily, and said helplessly: "It's okay now, the person has been found, but it's just a corpse." ”

"How did Zhang Lai die?" Officer Ding pouted, the same puzzled.

This person who had made him unable to eat and sleep well for the past few days was finally found, but it was a corpse, which immediately made Officer Ding feel quite frustrated.

After examining Zhang Lai's body, Officer Wang said cautiously: "This kid was stabbed to death with a knife." ”

"And judging from the current situation, it may be that Zhang Lai has been dead for a long time. ”

"Where is the administrator?" Gu Chen hurriedly raised his head and looked for the administrator's aunt who had led the way just now.

He Junchao hurriedly took a step back and beckoned to the caretaker aunt in the corridor: "Come over quickly." ”

It was also because of the excessive fright, and when I walked to the room, I found a corpse on the ground, so the administrator's aunt was also frightened and screamed.

"This ...... What's going on? How can there be dead people on the ground?"

"Don't be nervous. Gu Chen hurriedly walked to her side, pointed to the corpse on the ground and said, "This person is Zhang Lai who lives in your road administration apartment, you don't know him, right?"

"Yes...... Is that guy?" The administrator aunt swallowed her saliva suddenly, hurriedly stepped forward cautiously, bowed her body and glanced at Zhang Lai's appearance a few times, and then said: "It's really him, how could he die......?"

Seeing Zhang Lai's tragic death, the administrator's aunt quickly turned around: "Oh my God, what a sin, it's not good where he died, but he is going to die in our road apartment, how can I rent this house in the future." ”

"I'll ask you. Gu Chen saw that the aunt's mood eased a little, and hurriedly asked, "When was the last time you saw Zhang Lai?"

"The most ...... One last time? Let me think about it. The administrator's aunt froze at the moment, scratched her head with her right hand and thought repeatedly, and then said: "Yes, I remember, it was three days ago, the last time I saw him, it was a morning three days ago, he was very flustered when he went downstairs, and he touched me directly, and I also reminded him to walk carefully." ”

"I don't seem to have met him since then, after all, he is also a new tenant, and I don't know him very well and don't pay much attention to him. ”

"That is to say, since you met Zhang Lai three days ago, you have never found any trace of Zhang Lai, so haven't you checked these people's rooms?" asked Officer Wang.

The administrator's aunt frowned: "I said comrade policeman, all my rooms here have been rented out, of course I don't need to check, if there are extra rooms, there are tenants who want to come over and have a look, I will take them upstairs for a walk." ”

"But the key thing is no, we have very cheap rents here, and most of the tenants are construction workers who come here to settle down temporarily. ”

"So they rent here, and I just take the money, and I don't ask anything else, as long as I don't make trouble in the apartment. ”

Lu Weiwei took a look at the apartment environment at the door, and then walked back to the room and said: "This is equivalent to the dormitory of the old school before, I have seen it, the people here live very mixed, and many old people and children are crowded into one room." ”

"That's right. The administrator's aunt hurriedly said: "Our location is actually good, but it is about to be demolished, so the rent on our side is quite cheap, and there are more people renting." ”

"Especially there are more people from other places, on our side, dialects from all over the world are gathered together, I feel that there are people from all over the world, usually some people are fierce and vicious, and they look very scary, so I usually don't go upstairs much. ”

After thinking about it, the administrator's aunt hurriedly said: "Oh yes, in the corridor on our side, there are often people fighting, and the kind of movement is particularly big." ”

"Some people fight when they don't agree with each other, and I heard about one three days ago, but I didn't take it seriously because there are a lot of people here who drink and fight. ”

"Could it be that Zhang Lai died three days ago?" said Officer Ding.

Gu Chen continued to examine Zhang Lai's body, and after repeated searches and verifications, Gu Chen clapped his hands, stood up and said, "The deceased Zhang Lai, the time of death was indeed three days ago. ”

After looking at the surrounding environment, Gu Chen said again: "And the murderer is obviously a professional criminal, he did not leave his fingerprints and footprints, and he also took away the murder weapon." ”

After Gu Chen entered the house, he used his specialty-level observation power to conduct a detailed inspection of the interior of the house.

Officer Ding said, "Gu Chen, what is your basis? He died three days ago, is it accurate?"

"That's right, three days ago. Gu Chen squatted down and pressed his fingers on Zhang Lai's corpse a few times, and then said:

"In fact, there are generally several ways to judge the time of death of a corpse, and these are all things I learned from Forensic Doctor Liu. ”

"Oh?" Seeing that Gu Chen had confidence in himself, He Junchao, who usually had the opportunity to handle cases with Gu Chen, was suddenly curious like a primary school monk, so he hurriedly asked him: "What are the ways?"

"Look at the stiffness of the corpse. Gu Chen pressed the corpse with his fingers again, and then said: "Under normal circumstances, the corpse will be ossified within 30 minutes to 2 hours after death. ”

"It will be completely stiff for 9 to 12 hours, softened after 30 hours, but returned to the same after 70 hours. ”

After thinking about it, Gu Chen said again: "Of course, if the corpse is in the soil or water, or in the case of low temperature and dryness, it will be delayed, and it will be accelerated under high temperature and humid conditions. ”

"But judging from the climatic conditions in the past few days, it seems that there is little impact. ”

Officer Ding and Officer Wang nodded frequently when they heard this, and He Junchao also agreed, but soon he asked again: "It can indeed be judged by the stiffness of the corpse alone, but what else?"

"There is also the judgment based on the temperature of the corpse. Gu Chen stood up directly and said, "Generally speaking, within 10 hours after death, the temperature of the corpse drops by 1 degree Celsius per hour. ”

"And more than 10 hours after death, the temperature of the corpse drops by 0.5 degrees Celsius per hour. ”

"There is also a kind of judgment based on the purple-red patches that appear on the skin under the corpse after death, that is, corpse spots. ”

"Dead spots usually appear 2 to 4 hours after death, develop to their maximum height after 12 to 14 hours, and remain fixed and do not metastasize after 24 to 36 hours. ”

"Therefore, judging from this point, the time of death of the deceased Zhang Lai was at least more than 36 hours, but based on the stiffness of the body, I can conclude that the time of his death should have been three days ago, that is, the first day we searched for him. ”

also listened to Gu Chen's detailed explanation, and He Junchao gave a thumbs up in admiration: "It seems that Forensic Doctor Liu's set of things, you Gu Chen have already eaten it thoroughly, and it turns out that the time of death can be judged according to these things." ”

"Then since he was killed three days ago, why didn't anyone know about it at that time?" Officer Wang felt a little puzzled, and quickly looked at the administrator's aunt.

The administrator's aunt was stunned for a moment, and quickly explained: "Didn't I just say, I just rent a room and check out, there are too many people living here, and there are often people who drink and make trouble." ”

"I'm fine, I don't usually go upstairs, and I don't know what's going on upstairs, really. ”

After thinking for a few seconds, Lu Weiwei hurriedly asked her, "Then who do you think among you tenants is most likely to do this kind of thing?"

"This ......" The administrator's aunt was stunned again, and after thinking about it repeatedly, she still shook her head: "I'm sorry, comrade police, if you want to say who is most likely, I can't talk nonsense about this kind of thing." ”

"Anyway, the environment here is not good, and outsiders who want to develop in Jiangnan City for a long time will definitely rent a more reliable place. ”

"This place is a place where the floating population lives temporarily, and the rent is cheap, compared with the rent of the surrounding apartments, it is several times that of here. ”

"So there's everyone, and I don't know much about these people, so I'm sorry, comrade policeman. ”

Seeing that Zhang Lai is corpse on the ground, the administrator's aunt immediately wiped her tears: "This child, it should be quite young, why is this gone, what do you say this is called." ”

At this time, He Junchao seemed to have made some new discoveries on the table, and he hurriedly called everyone: "Look at this." ”

Gu Chen was the first to come to the table, Zhang Lai's desk was full of manuscript papers, one of which looked like a letter, so Gu Chen took it in his hand and read it softly:

"He's coming again, getting closer, you hear, footsteps, click...... Click...... Click......"

Zhang Lai just wrote this line in scribbled handwriting, and when Gu Chen continued to look for other manuscript papers, he didn't see the following words anymore.

Lu Weiwei was also very puzzled, she hurriedly asked Gu Chen: "This is obvious, it is likely that Zhang Lai knows something, or before he died, he knew that someone was coming to him, so he wrote down what he heard on the manuscript paper." ”

"This guy is writing horror, right?" He Junchao felt very strange, and pointed to the text on it and said: "You see, although it is a sentence, it seems that someone is really approaching outside the door." ”

"You say, is this guy paranoid, mistaking the footsteps passing by the door for someone coming to him?"

Gu Chen shook his head: "I don't see it." ”

"I don't think so. Lu Weiwei also said: "What do you think, who wants to stab him in the body? ”

Since he knew him, he would definitely come to him, but it can be seen from this sentence that Zhang Lai obviously knew that someone was coming to him, so he was extremely nervous. ”

"Especially this sentence: He is here again, and the emphasis is on 'again', what does this mean? It means that this person has already been here once. ”

also listened to Lu Weiwei's analysis, and Officer Wang couldn't help admiring: "It seems that after following Gu Chen for a long time, people will become smarter, that's right, this word 'again' is very revealing, it seems that this Zhang Lai has something to tell us." ”

He may have known this murderer, but judging from the words he left on the manuscript paper, he seemed to be very afraid of this murderer, and seemed to know that this person was not good. ”

"What Senior Brother Wang said makes sense. Gu Chen also took the manuscript paper and looked at it for a long time, and then looked up: "If Zhang Lai deliberately uses the words on the manuscript paper to tell us that someone wants to be unfavorable to him, then there will definitely be other clues." ”

Looking up at the caretaker's aunt, Gu Chen asked her, "This aunt, are there any people with mobility problems in your apartment?"

"Yes...... There is one. The administrator's aunt was also a little curious about Gu Chen's question, but there was just such a person in the apartment, so she hurriedly said: "His leg seems to have been broken by someone with a steel pipe in the group fight, and I also asked casually when he moved into the apartment." ”

"Then he should also live on this floor, right?" Gu Chen asked again.

"Yes, it's not far from that. The administrator's aunt was full of doubts, and quickly asked Gu Chen again, "How do you know?"

Gu Chen didn't answer directly, but continued to ask: "Auntie, let me confirm one more question with you, does that person with inconvenient legs and feet live in room 314?"

"Huh?" was also taken aback by Gu Chen's speculation, and the administrator's aunt was suddenly stunned, and the whole person said without knowing why: "You...... How do you know that? This person with inconvenient legs and feet, really...... I really stayed in room 314. ”

This time it was Officer Wang, Lu Weiwei, Officer Ding and He Junchao dumbfounded.

Everyone had a look of surprise on their faces, feeling a little incredible.

"Gu ...... Senior Brother Gu. Lu Weiwei looked at Gu Chen with straight eyes, and asked him weakly, "Is this ...... How do you know that?"

"It's simple. Gu Chen felt that there was no need to hide it, and said directly: "Because of the words on his manuscript paper, you see." ”

Gu Chen pointed to a few of the words and said, "This is actually the note left by Zhang Lai before he died, and the footsteps are 'click...... Click...... Click, judging by this rhythm, it seems that the murderer has limited mobility and may have relied on crutches to travel. ”

"That's right. Officer Wang suddenly realized, and he hurriedly said: "We also passed through the corridor just now, this kind of ground, the footsteps are very small, how can there be a 'click...... Click...... What about the sound of footsteps? This is obviously emitted by other substances, and I also agree with what Gu Chen said about the crutches. ”

"I see. Officer Ding also nodded thoughtfully, but soon he asked Gu Chen again: "But even if you know that the other party has inconvenient legs and feet, how do you know that you live in room 314?"

Zhang Lai told me. Gu Chen said.

Zhang ...... Zhang Lai told you?" Several policemen were stunned at the same time, and everyone looked at each other, feeling a little foggy.

Gu Chen didn't sell it, he took a few steps forward directly, and tapped Zhang Lai's arm with his toes: "Look at it, what are Zhang Lai's subordinates?"

"One...... Circle?" Lu Weiwei looked up at Gu Chen and said, "It's a circle made of blood. ”

"That's right. Gu Chen turned to face everyone and said, "Zhang Lai is an Olympiad genius, you can know it from Yuan Shaogang. ”

"And this person is paranoid about mathematics, likes to delve into math problems, and is an obsessive-compulsive disorder, do you think he will be bored to draw circles before he dies?"

Everyone looked at each other and shook their heads.

Gu Chen snapped his fingers and said, "That's right, he won't, a person like him who is obsessed with mathematics is just telling us in a circle that his murderer is there." ”

"Considering his obsession with mathematics, I deduced that he must have wanted to tell us in terms of pi, which is 3.14, so I determined that the murderer should have lived in room 314. ”

also listening to Gu Chen's explanation, everyone seemed to suddenly open up.

Officer Wang stared at Gu Chen's face, and there was no sound of breathing for a few seconds, and he asked alertly, "So, the murderer is in room 314 at the moment?"

"Just check it out. Gu Chen said.

Officer Ding couldn't wait any longer, and immediately patted He Junchao on the shoulder: "He Junchao, let's go and have a look." ”

After speaking, the two took the lead and rushed out of Zhang Lai's room directly.

Room 314 and Zhang Lai's room are both in the same corridor.

At this moment, before the administrator's aunt could follow, the two began to knock on the door "tuk tuk".

"Who?" said a gruff voice from inside the room.

He Junchao didn't reply, and turned his head to look at the administrator's aunt.

The administrator's aunt understood and hurriedly shouted: "It's me, I'm the administrator, you open the door." ”

"What are you looking for me?" the tenants in the house seemed reluctant to open the door, and were a little alarmed.

......