Yan Guanghai said: "No rope was found at the first scene, it is estimated that it was taken away by the murderer, and the situation is the same as when Niu Xi was killed before, and we have no key evidence." ”

Fang Yao shook his head: "Well, it is indeed possible, but it is precisely because I have a more daring guess about the circumstances of Elizabeth's murder that after locking in the candidate for the murderer, I found that the murderer has left a fatal 'flaw'." ”

"So, in fact, finding the 'rope' can only give my reasoning a 'final word', and it doesn't matter if I can't find it. The question is, though, whether or not my testimony will be accepted by those players with ulterior motives is another matter. ”

Xu Yueren asked: "Players with ulterior motives?" Are you talking about Zhao Ting? To be honest, Zhao Ting's reaction is indeed very abnormal, and the group of people in her power are all acting weird this time? ”

Yan Guanghai said: "No matter how much you entangle those people, it won't help, right? Instead, think carefully about where the rope might appear. ”

Xu Yueren immediately denied: "Isn't it stupid to leave the rope at the scene, looking forward to discovering the rope?" Don't even think about it. ”

Yan Guanghai asked: "In this case, how long and thick does it take to pull the sink?" Maybe hidden behind your back or in your trouser pocket? It's been exposed a long time ago! ”

Xu Yueren's face was red: "Old Yan, if you say so, your words are conclusive, then tell me where the rope is!" ”

Yan Guanghai's voice also came up with the anger: "I'm going to find it now!" ”

Fang Yao pushed the cheeks of the two of them hard: "Stop, stop!" It's rare to see the two of you actually quarrel, aren't you the best partner? ”

"Don't make any noise, you learn from Sister Lan Zhi, you have been quietly observing for so long, and you have never lost your cool."

"Finding the rope certainly makes our reasoning more perfect, if we can't find it, we find some other circumstantial evidence, and the logic is still strung together, and now is far from the time to be anxious and quarrel."

"Let's start by going back to the pool, the back half of the indoor playground, although I think it's very unlikely that a rope will be found there."

The "second half" that Fang Yao refers to is actually the merry-go-round, the bumper car and the wall at the end, of course, she thinks that there is really no need to investigate in the computer room of the secret room, because the murderer has no time to hide the rope in that kind of place.

Qin Lanzhi is a person who takes action more than she speaks, she has taken the lead in the investigation and has reached the vicinity of the bumper car.

Xu Yue and Yan Guanghai shook hands and made peace, and the two of them went one after the other, taking care of the left and right, and checked the merry-go-round.

Fang Yao walked straight to the wall and checked all the way along the wall, but there was no trace of the rope.

The four of them met at the door of the computer room in the back room.

Xu Yueren looked at the computer room of the secret room with a puzzled look: "Otherwise...... Let's go in and have a look? ”

Yan Guanghai said: "Okay, Xu Yueren, don't be suspicious, don't forget that you have always insisted on the rope on the murderer beforehand." ”

"Besides, the possibility of the murderer approaching the computer room and handling the ropes is almost zero, just imagine how difficult it is for him to deal with the ropes in the vast darkness and avoid the large pool perfectly?"

"Do you think he would take such a reckless step in his 'special identity' where 'don't make any mistakes' is the first priority of the crime?"

Fang Yao patted Xu Yueren on the shoulder: "This time I completely agree with Guanghai, okay, Yueren, don't be unwilling, in short, now except for the changing room and the corner of the black switch, we have determined that there are no ropes in the entire indoor playground." ”

"It's not in vain that we spent so much manpower and time to investigate, and now we are relieved, 'cat greasy' can only appear in that small area, we keep our eyes open, and it's not a sure thing that we have something to gain?"

So, before the four of them came to this corner, Fang Yao said, "We just need to find out if there is a gap in the wall." ”

"Of course, it would be better if there were obvious traces of rope friction, and if not, a gap would be enough to explain the problem. If I don't have either, then I can only consider myself unlucky. ”

As soon as she finished speaking, Qin Lanzhi pointed to a place at a considerable height at the intersection of the plane of the wall on the left side and the plane extending the inside that formed this corner: "Gap, there." ”

The eyes of the three of them moved in the direction of Qin Lanzhi's fingers, and finally fixed at a height of about one meter eight above the ground where the planes of the two walls intersected to form a right-angled corner.

There, there was indeed another deep gap embedded in the wall, the reason why Fang Yao didn't find this gap after turning on the chandelier switch at the beginning was because the height of the gap exceeded Fang Yao's height.

Fang Yao had been looking down for water stains and watermarks at that time, so naturally he couldn't suddenly look up and observe this gap.

However, she was overjoyed: "The determination of this 'evidence', on the other hand, can almost give a 'sentence' to the 'special status'." ”

"I just need to do another comparison."

"Sea of light! What is your height? ”

Yan Guanghai replied: "About one meter eight." ”

Fang Yao smiled slightly: "Very good, you are now as close as possible to the gap, with your back against the wall, stand up straight and let me take a look." ”

Yan Guanghai was noncommittal, so he did it as if he had a physical examination to measure his height in high school.

The results showed that the height of the gap was more than the distance above Yan Guanghai's head.

Xu Yueren asked, "What does this mean?" High enough? ”

Fang Yao said: "This can show that the gap is at least 15 centimeters higher than Guanghai, or 20 centimeters. ”

Xu Yueren asked: "So the gap is about two meters high from the ground?" So what does that mean? Is the gap caused by a rope? ”

Yan Guanghai returned to the team, and Qin Lanzhi also had a look of eagerness for the performance of the princess of reasoning.

Fang Yao said: "First of all, this gap is caused by a tough rope, and the possibility is very high, because the angle of the gap is narrow and the embedding is very deep, indicating that it is a horizontal force. ”

"Although most boys, even Zhu Shao, who is in his early seventies of one meter, can form a gap by hand, the gap formed by picking the corner of the wall is vertically forced, and it is impossible to embed it so deeply."

"The tool that can also do this is a knife, but it is clear that no one has a knife, and only the 'special status' may have it. However, it is impossible for the mysterious person to provide a murder weapon that has nothing to do with murder......"

"I mean, with a sink and a special rope, the murderer is limited in how to kill, and the 'direct murder weapon' of the knife cannot exist."

"So, the conclusion is that no one on the spot has a knife or a blade."

"Okay, let's get down to business, the gap caused by the rope is two meters high, Guanghai, if you are a murderer, pull the rope, and you need the water surface if you want to pull out such a 'very weighty' murder weapon as the sink to overcome the resistance of the water surface?"

Yan Guanghai thought for a long time and said, "This is the way I can think of a combination to do it - the pulley principle plus the shoulder force." ”

Fang Yao smiled with relief and said, "Guanghai, it coincides with my thoughts. ”

Xu Yueren was also interested: "Oh? Hurry up and ask the two gods to answer our questions. ”

Qin Lanzhi said: "Although I don't want to admit it, I have to say that I don't understand the previous questions and answers of the two of you." ”

Fang Yao explained: "First of all, this rope is not only tough, but also equipped with a pulley device at the end position, which can save a lot of effort by relying on the pulley principle. ”

"Still, the conditions are tough, so the best way for the killer to pull the sink is to put the rope on his shoulders and pull with both hands."

"It is known that the height of the shoulders is about 20 centimeters minus the height, considering the position where the gap appears, combined with the position where the murderer stands at the end of the line, what can you think of?"

Xu Yueren shrugged helplessly: "Hey, is this solving a difficult comprehensive problem of mathematics and physics?" Come on, I've forgotten all that stuff from my middle school years. ”

Yan Guanghai spread his hands: "I'm sorry, Xiao Yao, I don't want to use my brain now." ”

Qin Lanzhi blinked her beautiful eyes and stared at Fang Yao. Naturally, she won't give an answer.

Fang Yao said: "The end position is the position of the black switch, because the moment the sink comes out of the water and takes off, the scene is pitch black, indicating that the murderer pulled the rope with the pulley device with one hand, and pressed the chandelier switch at almost the same time with the other!" ”