Full career experience system Lin Yiji's face

Immediately, Lin Yi went to her bedroom again.

The bed was messy, with scratches on it, and the cosmetics on the dressing table were scattered all over the floor, but it didn't look like a fight, it was more like a struggle.

After looking around, he didn't find anything suspicious in Du Juan's house, then he went back to the living room and joined Li Xianghui and Gu Yiran.

"Is there anything special found at the scene?"

"Find these four things?"

"Pinhole camera?"

Li Xianghui nodded, "It's hidden in two bedrooms, the bathroom and the kitchen, and it's being monitored 360 degrees without any blind spots."

"Cuckoo shouldn't know about this, right?"

"The speculation is like this, but what happened specifically has yet to be analyzed, and no conclusion can be drawn now."

"The corpses have all been carried out. Is there any preliminary results? Are you sure it's a suicide?"

"Except for these four cameras, I haven't found any useful clues yet, but it doesn't seem like suicide." Li Xianghui pointed to the kitchen with his chin.

"Come with me."

When the two came to the kitchen, Lin Yi glanced at the location of the stove.

The switch is closed.

According to common sense, if it was suicide, the gas switch should be on, and it would be wrong to turn it off.

"That's not the point, look here."

Li Xianghui pointed to the gas pipeline:

"There is a corroded hole here, but after testing, we found traces of man-made damage. It is basically certain that it was a homicide, but there are no clues at the scene, so it is difficult to track down 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!

While the two were talking, a forensic doctor came over.

"Captain Li, the results have come out. The deceased Du Juan died of poisoning due to inhalation of excessive carbon monoxide while he was in a deep sleep. It's a typical locked room murder case."

"I would like to ask, if a person takes too much carbon monoxide while sleeping, won't he be woken up by choking?"

"This possibility exists, but it depends on the situation. The leaked carbon monoxide content is not large. When she reacts, her body functions are affected. It is very difficult to deal with it effectively."

"And her bed was very messy. There were wrinkles in many places on the bed. It should be after she was poisoned and struggled for a while, but it didn't work."

"Okay, I see, thank you."

After reporting the situation of the deceased, the forensic doctor turned and left. The three of Lin Yi got together and began to analyze the case.

"Is there surveillance around here? Have you caught anyone suspicious?"

Gu Yiran shrugged, "This is an old community, and the monitoring is all for decoration, and none of them work."

"That's a bit strange." Lin Yi said:

"After leaving the police station, our people have been following him secretly. When did the murderer go in and destroy the gas pipeline?"

"I've asked the person in charge of Du Juan's care, and they were able to determine that Du Juan did not come out after entering the door, and no one had entered her home."

Lin Yi's question is also the question of other people, and they don't really want to understand what's going on.

Now the question is deadlocked again, how did the murderer come in and kill?

"Is there such a possibility that the murderer came in ahead of time, so as to achieve his purpose of killing?"

"Now there is only one possibility. Their family lives on the sixth floor, and it is unlikely to come in from the outside window, so it is easy to be discovered." Lin Yi said:

"But the problem is that the place where the gas leaks is the pipe. There is no switch there. Once there is a leak, it will be continuous. After Du Juan comes back, he will definitely find something is 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 pipeline?

If this can be unraveled, the murderer's modus operandi will be clear.

Lin Yi came to the kitchen and saw the damaged gas pipe.

Then cautiously went up and touched it.

In the damaged place, there are still small barbs, which are obviously man-made.

Lin Yi looked at it carefully for a long time, but still couldn't figure it out.

There is no one inside, but the other party can control the opening of the hole.

How is it done?

"Ok?"

Just when Lin Yi was thinking about the problem, he found something was wrong.

Next to the hole, he saw a black substance smaller than a sesame seed, which didn't seem to be rust.

"Brother Li, do you have tweezers to help me find one?" Lin Yi said.

"Have you found anything?"

"There's a very strange thing on the pipe, I'm going to get it down and have a look."

"You wait."

Li Xianghui went to the forensic doctor, asked for a pair of tweezers, and handed it to Lin Yi.

Lin Yi took another facial tissue, and carefully removed the little black substance.

"What is this?" Gu Yiran raised his head and asked.

Lin Yi shook his head, stared at the little black substance and said:

"Not sure yet, I took it from around the hole."

"But it seems to be sticky. I just saw it stuck to the tweezers."

"viscosity?!"

Suddenly, Lin Yi ran to the window in a hurry, his eyes widened suddenly, because he saw what he wanted to see!

Although Du Juan is very beautiful, she is not virtuous, as can be seen from the furnishings in her home.

In other words, there are not many virtuous women who can be others' lovers.

So the window sills of their house are not clean, especially around the plastic-steel windows, which are covered with dust.

But there is a white line that divides the dust on the plastic-steel window into two pieces.

At the same time, Li Xianghui and Gu Yiran also walked over.

"What did you find?"

Lin Yi pointed to the white mark on the edge of the window.

"I understand the murderer's modus operandi."

Neither of them spoke, waiting for Lin Yi to continue.

"The murderer came to their house quietly before Du Juan 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."

"And then, how did he pull off the tape?"

"Fishing line!"

"The murderer is outside, using a fishing line to connect the tape at one end of the pipe. When the time is right, pull the outside fishing line, and the tape will be torn off smoothly, and the gas inside will naturally leak out."

"I understand!" Li Xianghui said:

"The white marks by the window should be traces drawn by fishing lines!"