Chapter 1280

Xiao Yan went over and pointed to the iron wire and said, "this kind of iron wire is very common in northern rural areas. It also has a nickname called 'kill'! People use this kind of iron wire to cover rabbits and foxes. Even wild boars can catch it. The strength of wild boar's struggle is much stronger than his tall, rich and handsome man hollowed out by wine and color?"

People were puzzled, but out of respect for him, they no longer objected, but they obviously didn't believe it.

"The steel wire is too hard to make a turnbuckle. If you don't believe it, you can go up and look at the back of his neck. There must be a turnbuckle!" Xiao Yan said, raising his head and began to observe where the iron wire fell.

It's the air conditioning filter. The filter here is very small. People can't get in and out. That is to say, the murderer is the one who hid in it.

What we need to do now is to drill into the ventilation pipe, find the trace of the killer climbing, and finally determine the location of the killer's entrance and exit.

The policeman next to him had moved a ladder. The old man climbed up and looked at the back of his neck under fear. Finally, he shouted in surprise: "God, it's really strangled with a live buckle. Such a thin wire can kill people."

"Find a waiter. I need to know the entrance of the ventilation duct." Xiao Yan turned and shouted.

The policewoman quickly went out and shouted. A moment later, the waiter named Li gaoshuai came up. He was standing outside the living room.

"You can get in and out of the toilets on the left and right sides of the corridor!" Li gaoshuai knows the situation on the eighth floor very well.

Surprised, the policewoman asked, "how long have you been working here?"

"More than two months! The pipes here have been checked once a month, and the repairman has been here twice." he is very bold, next to the body, but he is not as afraid as others.

They nodded. After coming for so long, they knew that the pipe entrance was normal.

And guilty of being a thief, the others dare not come up, but they are suspected.

Xiao Yan went out of the door and walked towards the end of the corridor on the left. A policeman asked, "why don't you go in from the right?"

"The bathroom on the right is where the suspect goes in and out. Going in from there is easy to destroy the clues. Don't follow. Go and adjust the video at the door of the bathroom on the right to determine who goes in and out there." Xiao Yan said and accelerated a few steps.

But the policewoman didn't understand and asked loudly, "Why are you so sure?"

"Because my room is on the left, if someone climbs over my head at night, I will let him die on the way to murder." Xiao Yan is telling the truth.

Several policemen looked at each other. This man is too confident. If the verification direction is wrong, the next query may be wrong.

However, Xiao Yan has passed. They can only check the surveillance video, but two policemen are not at ease. They may have received Liao Guangming's Secret advice and still wait at the door of the left and right toilets.

The entrance is in the grocery room in the bathroom where washing supplies are stored. It is a small room. Climb the ladder on the wall, push the baffle and go in.

It's stuffy, but occasionally light comes up, which is where the filter screen of each room is located. Xiao Yan looked down at the passage in front of him. It seemed very clean.

But his eyes were so sharp that he could see that a little dust and impurities were attached to the wall of the channel, which was caused by frequent ventilation.

There are still more than ten days to clean the ventilation duct next time, so the attached things here have not been cleaned. But if ordinary people come in, in this environment, even if they hit a flashlight, they can't see the difference.

Without hesitation, Xiao Yan began his unique skill of climbing the ventilation pipe and quickly climbed to the site of the incident.

Soon, he appeared above bedroom 807, the crime scene.

Here, there is a small device that attracts Xiao Yan's attention.

At the top, there are two expansion screws, a small pulley is fixed in the middle, and the iron wire is across the track of the pulley. As long as you pull hard, not to mention Gu Tianyi's small body, even the fat man in southern Jiangsu may be pulled up.

The tail of the wire is tied to another expansion screw. The wire is tight as if it would break at any time.

But what makes Xiao Yan strange is that although the expansion screw has a strong load-bearing capacity, it is easy to fall off if it struggles badly.

The suspect committed the crime with precision and cautious means. He will certainly not make such a big mistake.

So Xiao Yan looked at the expansion screw carefully, and soon he found the reason.

Because the three expansion screws are new internal tooth metal expansion screws, which have stronger bearing capacity than conventional expansion screws, enough to support Gu Tianyi's struggle.

But the new internal tooth metal expansion screw is not common, which is mainly popular in Europe, America and the Middle East, and all of them are used in high-end construction sites.

It was introduced into China only a few years ago, but it is still very rare in ordinary construction sites. This discovery gave Xiao Yan a great clue.

He looked down along the filter screen. He could see the big bed obliquely from this angle. Although this kind of iron wire is not very soft, it is still very difficult to trap people from this angle.

Unless Gu Tian gets out of bed and walks under the filter screen. Or maybe he is doing sports intoxicated at the head of the bed. At this time, the loose buckle wire falling from above can trap him.

This case seems not very simple. Xiao Yan knows very well that the police must have opened the filter screen and saw the equipment on it.

Coupled with the signs of struggle in the room, it was completely determined that it was a murder.

Xiao Yan thought about it and then dialed Liao Guangming. He said, "help me check the information of the woman at the scene of the murder. The more detailed the information within three months, the better."

"OK, do you have a clue? Do you need me to send experts? Several guys who have been to the scene just now said that they didn't leave much clues, which is very difficult." Liao Guangming reminded.

Xiao Yan chuckled and said, "send a forensic doctor and give me the exact time of death. In addition, in half an hour, I'll tell you who the real murderer is."

"What? Half an hour? Mr. Xiao, I know you are an expert in investigation, and I have no doubt about your professionalism. However, I reserve my own attitude. I don't believe you can find out the murderer in half an hour." Liao Guangming said very seriously.

Xiao Yan smiled again, looked at Gu Tianyi's body below and said, "I will prove my ability with hard evidence, not rumors. In addition, inform Sunan that the deceased is his cousin and he should come to collect the body."

With that, he hung up the phone and then climbed into the ventilation duct on the right.

Very clean, so clean that it is completely different from the opposite, and the attachments on the surface have disappeared.

This place has been cleaned up. The murderer is very cautious. It can be seen that he is a careful man.

Soon, Xiao Yan climbed to the exit, and a policeman was waiting for him.

"How's Mr. Xiao? Did you find anything?" seeing him coming down, the young policeman looked at him.

Xiao Yan didn't disappoint these admirers. He took off his white gloves and said, "we can basically determine the scope of the suspect. Let's watch the surveillance video and call the supervisor in charge of the staff here."

"OK!" the policeman didn't expect to be so fast. He answered happily, turned and hurried to work.