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Facts have proved that girls are indeed much better at doing the delicate work of "jigsaw puzzles" than rough guys.
Liu Yi went out to inspect the surroundings, and when he returned to the small building with the two criminal policemen who arrived, Gao Mei and Song Yan had roughly restored the appearance before the glass was broken.
When two criminal police officers entered the kitchen to collect evidence, Liu Yi got closer and looked at the round hole in the center of the glass.
The diameter is about twenty-five to thirty centimeters, and the edges are very smooth, or rather rounded.
To be more specific, if you gently rub the cross section with your fingertips, you won¡¯t feel any sharpness at all.
"It looks like it was burned by a high-temperature spray gun No, there will be melted piles when spraying the gun. This should be cut by a laser beam." Liu Yi whispered.
"So round?" Song Yan was a little incredulous.
"Machine." Gao Mei answered her question.
"A person holding a laser machine stands outside the window and cuts glass? This is impossible!" Although Song Yan didn't understand criminal investigation and other matters, he spoke with unusual certainty.
The reason is very simple. There are surveillance cameras outside the small building to take pictures without blind spots, and there are countless field workers stationed at fixed points.
A big living person standing outside the window cutting the glass is considered a surveillance device, or a field worker is blind.
Gao Mei and Liu Yi also knew it was impossible. After looking at each other, Gao Mei picked up the remote control and opened the surveillance records, while Liu Yi stood at the door of the kitchen and watched the two criminal police officers inspecting the scene.
The small building was recently renovated, and it was carefully cleaned before Academician Qin moved in.
So, everything upstairs and downstairs, including the kitchen, is very clean.
Although it is clean, there are many traces left behind by human activities.
The cleaning staff, the national security field staff, and Liu Yi have all basically entered the kitchen.
Not only walking around inside, but also doing cleaning or safety inspections at every corner.
Therefore, traces such as fingerprints and footprints that are invisible or unclear to the naked eye are not only numerous but also very messy.
The two criminal police officers quickly completed the inspection of the windows and window areas.
After finding no traces of outsiders entering, we began to extract and compare the footprints and fingerprints around the stove.
After watching for a while, Liu Yi said hello to Gao Mei and left the small building alone.
The two detectives worked hard until daylight, finally matching all the extracted footprints and fingerprints one by one.
The conclusion is that, except for the two cleaning staff and the people who conducted preliminary inspections from the National Security Bureau, the remaining traces were left by a few people from the Jingzhe team.
In other words, judging from the traces, no outsiders have come in.
During this period of time, the external surveillance of the small building and the surveillance of the entire dormitory were also watched over and over again.
¡°No matter whether it was the Gaomei team or the National Security field team, nothing suspicious was found.
The surveillance cameras throughout the sanitation center are mainly concentrated in the outer circle and at several intersections in the hospital. Blind spots definitely exist.
But the surveillance around the small building was installed yesterday before Academician Qin moved in.
Absolutely 360-degree surveillance with no blind spots, and all cameras have night vision functions.
It can be said with certainty that, let alone a human being, even a night owl or even a mouse will be clearly seen if it approaches.
The field team leader rubbed his dry eyes vigorously and said angrily: "What the hell is going on? Damn it!"
¡°Dangdang~¡± There was a knock on the door.
Without waiting for anyone in the room to respond, Liu Yi pushed the door open and entered the room, and said directly: "It's not a ghost."
Of course, several people in the room knew it was not a "ghost", and they all looked at Liu Yi who suddenly appeared without making a sound.
Liu Yi ignored the inquiries, questions, and even vigilant glances that fell on him, and walked directly to the floor plan of the sanatorium.
Pointing to the path outside the courtyard wall in the northeast corner, he said: "Inspect the surveillance cameras on both sides of this road.
Theoretically, all motor vehicles and pedestrians who came in and out last night are suspects. "
The field team captain looked at the place Liu Yi was talking about and said in an indifferent tone: "It's close to a path, and thieves have come in before.
Therefore, two surveillance cameras were specially installed in the dormitory, and there was also a wide-angle security camera outside the wall.
Unless you fly over the courtyard wall directly into the courtyard, otherwiseOnly then can the other party know all the details quickly and accurately.
Only with the cooperation of internal personnel, the other party can quietly approach the target building under heavy surveillance.
In a tense silence, Liu Yi clicked on the plan with his hand to mark the end point of the dive route.
He said, "Don't be nervous. If my guess is correct, the people who come in will just stay here."
"Then how did they"
A young policeman couldn't help but question, but he only spoke half of his words when he was glared at by the field captain.
"It's a bit science fiction." Liu Yi sighed first, and then said: "If my guess is correct, they should be using drones."
"You mean to use a remote control plane to cut the kitchen glass, then fly into the kitchen and open the valve?" The young policeman rolled his eyes cryptically.
Although the other people in the room remained silent, their expressions were similar to those of young police officers.
But soon, everyone became thoughtful again.
At first glance, when Liu Yi¡¯s statement is heard, the first reaction is that it is very nonsense.
But after thinking about it carefully, I found that if the other party really used a drone, all the confusion and unexplainable confusion now made sense.
The room was quiet for a while, and the field captain said hesitantly: "Judging from the round hole on the kitchen glass, the diameter of the drone is no more than thirty centimeters.
¡°A drone with a diameter of less than 30 centimeters is equipped with a laser head that can cut glass, as well as a mechanical structure that can turn butterfly valves and fire control valves
Isn¡¯t it a bit too sci-fi? "
"It's not necessarily a drone!" Liu Yi pulled up a chair and sat down: "I think they have at least three drones.
?? One can detect terrain, one can cut glass, and one has a mechanical structure that can turn valves integrated into it. "
In recent years, national security has seized a lot of spy equipment with extremely high technological content.
But to say that the infiltrator completed a series of actions with the help of a drone, the field team leader would definitely not believe it.
After all, the current level of scientific and technological progress is there. The enemy's equipment is advanced, but it also has limits.
"You can't be like guys in science fiction movies who can do it just by saying it."
But if there are three drones, each with its own function, the possibilities will increase infinitely.
Because, judging from the current level of science and technology, it is completely achievable (Remember the website address: www.hlnovel.com