Chapter 1712: : Killing Techniques

Chapter 1711
　　
　　 Soon, Lin Yi went to her bedroom again.
　　
　　 The bed is very messy, there are scratches on it, and the cosmetics on the dressing table are scattered all over the place, but it is not like a trace of a fight, more like a trace of a struggle.
　　
　　 After looking around, he was not in Du Juan's house and found anything suspicious. Then he returned to the living room and joined Li Xianghui and Gu Yiran.
　　
　　 "Are there any special discoveries at the scene?"
　　
　　 "Found these four things?"
　　
　　 "Pinhole camera?"
　　
　　 Li Xianghui nodded, "It is hidden in the two bedrooms, the bathroom and the kitchen. It is monitored by people 360 ​​degrees without blind spots."
　　
　　 "Cuckoo doesn't know this, right?"
　　
　　 "The guess is like this, but the specifics need to be analyzed, and no conclusion can be drawn at this time."
　　
　　 "The corpses were all carried out, are there any preliminary results? Can you be sure that it was a suicide?"
　　
　　 "Apart from these four cameras, I haven't found any useful clues, but it doesn't seem like suicide." Li Xianghui pointed to the kitchen with his chin.
　　
　　 "You come with me."
　　
　　 The two came to the kitchen, Lin Yi glanced at the position of the stove.
　　
　　 The switch is closed.
　　
　　 According to common sense, if it is a suicide, the gas switch should be on, and it would be wrong if it is off.
　　
　　 "That's not the point, look at this."
　　
　　 Li Xianghui pointed to the gas pipe:
　　
　　 "There is a corroded hole here, but after inspection, it was found that there were traces of man-made damage. It can be basically confirmed that it was a homicide, but there is no clue at the scene, and it is difficult to trace the murderer.
　　
　　 Lin Yi took a deep breath.
　　
　　 Song Deyuan’s problem has not been resolved, and now there is another murder case in a secret room.
　　
　　 This case is getting more and more interesting!
　　
　　 Just as the two were talking, a forensic doctor came over.
　　
"Team Li, the result has come out. The deceased Dujuan was poisoned and died because he ingested excessive carbon monoxide during his deep sleep. There were no wounds on his body and no traces of infringement. It can be confirmed that there was no contact with anyone during his lifetime. Fighting, it is a very typical back room murder case."
　　
　　 "I would like to ask, if people take too much carbon monoxide when they are sleeping, will they not be woken up?"
　　
　　 "This may exist, but it depends on the situation. The leaked carbon monoxide content is not large. When she reacted, her body functions were affected. It is very difficult to make effective treatment."
　　
　　 "Moreover, her bed was messy, and wrinkles appeared in many places on the bed. It should be because of the poisoning, she struggled for a period of time, but it didn't have any effect."
　　
　　 "Okay, I understand, thank you."
　　
　　 After reporting the situation of the deceased, the forensic doctor turned and left. Lin Yi and the three gathered together and began to analyze the case.
　　
　　 "Is there any surveillance around here? Have any suspicious people been photographed?"
　　
　　 Gu Yiran shrugged, "This is an old community, and the monitoring is all equipped, and there is no easy way."
　　
　　 "That's a bit strange." Lin Yi said:
　　
　　 "After leaving the police station, our people followed him in secret. When did the murderer go in and destroy the gas pipe?"
　　
　　 "I have asked the person responsible for guarding Dujuan, and they can decide that Dujuan did not come out after entering the door, and no one has ever entered her house."
　　
　　 Lin Yi’s question is also someone else’s question, and I didn’t really want to understand what was going on.
　　
　　 Now the problem has reached a deadlock again, how did the murderer come in and kill?
　　
　　 "Is there such a possibility that the murderer came in early to achieve his purpose of killing?"
　　
"Now there is only one possibility. Their family lives on the sixth floor and they are unlikely to come in from the outside window, so they are easy to be spotted." Lin Yi said:
　　
　　 "But the problem is that the gas leak is in the pipeline. There is no switch in that place. Once the leak occurs, it is continuous. After Cuckoo comes back, he will definitely find something wrong, and it is even more impossible to sleep. This is contradictory."
　　
　　The question raised by Lin Yi is also the key point of this secret room murder case.
　　
　　How did the murderer control the gas in the pipe?
　　
　　 If you can solve this, you can understand the murderer's modus operandi.
　　
　　 Lin Yi came to the kitchen and saw the destroyed gas pipe.
　　
　　 then went up and touched it cautiously.
　　
　　 There are tiny barbs in the destroyed place, which is obviously man-made.
　　
　　 Lin Yi watched it carefully for a long time, but still couldn't understand it.
　　
　　 There is no one inside, but the other person can control the opening of the hole.
　　
How did 　　 do it?
　　
"Ok?"
　　
　　 Just when Lin Yi was thinking about the problem, something was wrong.
　　
　　 He saw that beside the hole, there was a black substance smaller than sesame seeds, which did not seem to be rust.
　　
　　 "Brother Li, do you have tweezers to help me find one?" Lin Yi said.
　　
　　 "Did you find anything?"
　　
　　 "There is a weird thing on the pipe. I'm going to get it down and take a look."
　　
　　 "You will wait."
　　
　　 Li Xianghui walked to the forensic doctor, asked for a small tweezers, and then handed it to Lin Yi.
　　
　　 Lin Yi took another piece of facial tissue, and then carefully removed the small black substance.
　　
　　 "What is this?" Gu Yiran asked, looking over her head.
　　
　　 Lin Yi shook his head, staring at the little black substance and said:
　　
　　 "I'm not sure for the time being, I took it out from around the hole."
　　
　　 "But it seems to be sticky. I just saw it stuck to the tweezers."
　　
　　 "Sticky?!"
　　
　　 Lin Yi suddenly ran to the window, his eyes widened, because he saw what he wanted to see!
　　
　　 Although Cuckoo is very beautiful, it is not virtuous, as can be seen from the furnishings in her home.
　　
　　 In other words, there are few virtuous women who can be lovers of others.
　　
　　 So the window sills in their house are not clean, especially around the plastic-steel windows, which are covered with dust.
　　
　　 But there is a white line in it, dividing the dust on the plastic steel window into two parts.
　　
　　 At the same time, Li Xianghui and Gu Yiran also came over.
　　
　　 "What did you find?"
　　
　　 Lin Yi pointed to the white mark on the edge of the window.
　　
　　 "I understand how the murderer committed the crime."
　　
　　 Neither of them spoke, waiting for Lin Yi to continue.
　　
　　 "The murderer quietly came to their house before the cuckoo came back, and then quietly made a small hole in it, and sealed it with tape at the fastest speed, so that the pipe would not leak in a short time."
　　
　　 "Then, how did he pull off the tape?"
　　
　　 "Fishing line!"
　　
　　 "The murderer is outside. Use a fishing line to connect the tape at one end of the pipe. When the time is right, pull the outside fishing line to pull the tape off smoothly, and the gas inside will naturally leak."
　　
　　 "I understand!" Li Xianghui said:
　　
　　 "The white mark by the window should be a mark drawn by a fishing line!"
　　
　　 (End of this chapter)