"It can still be like this?"
Qin Ya's jaw dropped in shock again after she finally realized Fang Yu's purpose for using the sand.
She had been working with Guan Yunfeng for quite some time now.
In addition to the case studies she had learned from the school textbooks, she had never seen Fang Yu's method before.
Today, she had learned something new.
Qin Ya even felt that Fang Yu had a more professional aura than Guan Yunfeng.
Guan Yunfeng was surprised by Fang Yu's method of collecting evidence.
In all the criminal investigation he had come into contact with, he had indeed never seen such a method like Fang Yu's.
Moreover, he felt that Fang Yu's method was a little irregular and even a little indecent. It could not be used in the hall or in the teaching materials.
To put it bluntly, it was a little old-fashioned.
It was so old-fashioned that it felt like they were in the 1990s.
It was completely different from the current era of highly developed criminal investigation technology.
However, it was undeniable that Fang Yu's method was indeed effective.
Guan Yunfeng thought that if he was the one looking for this trace, he should be able to find it too.
However, he needed the help of modern high-tech equipment and repeated verification.
Moreover, he would be able to find these traces in a much longer time than Fang Yu.
Regardless of whether it was a white cat or a black cat, it was a good cat that could catch mice.
Although Fang Yu's method was very old-fashioned, causing everyone, including Fang Yu himself, to be covered in dust.
However, the final result was good. He had finally found something.
If Fang Yu hadn't used this " old-fashioned method ", they wouldn't know how long they would have been troubled by the cloud of doubt.
While Guan Yunfeng and the others were patting off the dust on their bodies, Fang Yu did not care about this at all.
At this moment, he was staring at the traces left by the tape and thinking seriously.
Guan Yunfeng and the others also stopped, afraid of disturbing Fang Yu.
"What can tape be used for?”
Fang Yu lowered his head and pondered.
"It can be used to stick things together!”
"And from one corner of the elevator to the other corner!”
"Then the thing stuck to it should be very long!”
"From the shape and area of these marks, the thing that the tape is stuck to shouldn't be big!
"From the looks of it, what the tape is sticking to should be something very long and thin!”
"String?"
"No, the rope is not tough enough, and it's not sharp enough. It can't behead people!”
"I got it!"
"Steel wire!"
"The thing that the tape sticks to is the steel wire!”
After a series of deductions, combined with the wire murder case he had encountered in the space, Fang Yu finally came to a conclusion.
"The murderer's murder weapon was steel wire!”
Under the expectant gazes of Guan Yunfeng and the others, Fang Yu finally gave the answer.
"Steel wire?"
Guan Yunfeng murmured.
If it was a steel wire, it was indeed reasonable to use tape to stick it.
Moreover, the steel wire was very hard. He had also encountered cases of pedestrians riding bicycles and accidentally bumping into the steel wire, resulting in injuries.
However, there was a prerequisite for killing with a steel wire.
That was, the victim had to rush to the wire at a very fast speed. This was a necessary prerequisite.
Otherwise, the steel wire would at most cut through the skin and flesh, but it would not be able to cut through the bones.
Guan Yunfeng looked around the elevator, but he didn't see anything that could make the victim rush to the wire.
Moreover, through the surveillance video, it could be seen that when the deceased Li Yanhong walked into the elevator, her speed was very slow.
If he were to hit the steel wire at this speed, he would not even suffer a superficial wound, let alone be beheaded.
However, when Guan Yunfeng explained his doubts to Fang Yu, Fang Yu was shocked.
Fang Yu gave him another explanation.
It wasn't the wire that the deceased was charging at, but the wire that was charging at the deceased at a high speed!
Fang Yu's words were not groundless.
He followed the traces left by the tape and finally found a very small round hole on the inner wall of the elevator on both sides. It was so small that it could not be seen without careful observation.
Around the round hole, there were obvious small grooves, as if something had been strangled.
There was no doubt that these small grooves were formed after the steel wire passed through them and was pulled hard.
"This murderer is not an ordinary person. He actually thought of such a method!”
Fang Yu did not need to explain further. Guan Yunfeng had already guessed the murderer's method of murder based on his years of experience in criminal investigation.
The murderer had placed steel wires in the elevator beforehand.
After that, the steel wire was led out of the elevator through two small round holes and fixed in a certain position.
When the victim, Li Yanhong, entered the elevator, she pulled the steel wire with the speed of the elevator's descent.
The victim had taken the elevator from the 16th floor to the first floor.
Then, the speed of the elevator's descent would be greatly accelerated.
Dragging the steel wire at such a speed could easily behead the dead.
Guan Yunfeng couldn't help but exclaim in his heart.
He was not only amazed by the killer's ingenious killing method.
He was even more impressed by Fang Yu's detective ability. In just half a day, Fang Yu had found the murderer's modus operandi that had troubled him for more than ten hours.
At this point, Fang Yu had completely passed the test in Guan Yunfeng's heart. He had even risen to the level of a divine detective!
This book is provided by FunNovel Novel Book | Fan Fiction Novel [Beautiful Free Novel Book]