Katie nodded secretly, once Gu Jie and Nan Ruoxun cooperate, they can indeed be compared to Zheng Hanfei, and their cooperation can even exceed her and Di Luo's cooperation, she has to admire Zheng Hanfei's vision.

Although Gu Jie and Nan Ruoxun are in the upper hand, Katie is not a person who casually admits defeat, not to mention that their conclusion has not been confirmed, so he said: "That's just me telling him out of kindness, besides, there is a major error in your reasoning just now, this is a straight corridor, there are no corners or anything, how can I use a mirror to reflect." ”

"That's what you say!" Gu Jie smiled, turned to Nan Ruoxun and said, "Xiao Xun, show her." ”

"Okay!" Nan Ruo pursed her lips and disappeared from everyone's eyes, and when she returned, there were two more huge pieces of cloth in her hand, and the scene on them was exactly the same as the walls on both sides of the corridor.

"This is the so-called 'straight' hallway?" Gu Jie said with a playful smile, "It blinds us, but if you look closely, you can see the difference, after all, no matter how realistic the scene is, it can't be compared with the real thing." ”

"Then tell me where the mirror is!" Unconvinced, Katie continued.

"I'm not familiar with this place, so I don't know which room it is." Gujie's words made Katie regain the initiative, but the next sentence surprised her, and the direction of the initiative shifted to Gujie again, "But I know that the mirror is in the bathroom on this level." ”

"What?!"

"You left us only in the time we discovered and shocked Diro, but in such a short time, it was good that you could complete the mirror and cover the east and west corridors with a cloth, and there was no time to go to the bathroom on the second floor, but at that time, there were water stains on your clothes and face. So I'm guessing that you lied before, there is a bathroom on the third floor, and you hid the mirror in the bathroom. ”

"Then you can find out." Katie said nonchalantly, "If you can find the so-called 'mirror', that is the best evidence to prove that I am an accomplice, Diro's disappearance." ”

And she did. Zheng Hanfei underestimated Katie in his heart, he had already guessed that Katie could use their ignorance of the layout of the third floor to cover up her "crime", so that neither the real conference room nor the location of the mirror could be evidence that could conclude her "crime".

Of course, they can look for it room by room on the third floor, but there is simply not enough time, who knows how many rooms there are on this floor, and who can guarantee that they will not get lost in the process of searching.

Fortunately, Zheng Hanfei finally found evidence, but what he was worried about was that with Gu Jie and Nan Ruoxun's observation, he might not think of that aspect.

Just as Zheng Hanfei thought, Gu Jie was speechless for a moment, and Nan Ruoxun's face also fell, they really forgot that Katie would have such a hand.

"There's still thirty minutes left, I hope you can hurry." Katie smiled, but she was a little disappointed in her heart, it seems that she still guessed wrong, except for the president, even if there are several people on the other side, it is impossible to compare with Zheng Hanfei.

I'm! Nan Ruoxun scolded resentfully in his heart, clenched his fists, and smashed directly towards the door beside him, only to hear a bang, and a faint crack appeared on the surface of the door.

"Xiao Xun, don't smash it, you have to pay for smashing the door." Zheng Hanfei smiled at Katie a little embarrassed, and hurriedly stopped Nan Ruoxun from continuing to punch, thinking to himself how could this kid be like this, didn't he just find evidence? Do you need to be so angry? If you smash the door, not only will the door be unlucky, but you will also be unlucky.

"That's right, you better stop fighting." Gu Jie grabbed Nan Ruoxun's wrist and dissuaded.

"But...... We're so close, I'm really not convinced! I really want to ...... this door that is not a real conference room" Speaking of this, Nan Ruoxun's eyes lit up, and he pointed at Katie and said, "I found evidence!" ”

"What?!" Gu Jie and Katie exclaimed at the same time, Zheng Hanfei smiled slightly, thinking to himself, Xiao Xun, good job!

"It's the key to this door!" Nan Ruoxun said excitedly, "If this room is really a conference room, then that key should be able to open the door of this room." ”

"You mean I changed the key to my room door?"

"That's right!" Nan Ruoxun nodded, "The key to the conference room can only open the door of the conference room. ”

Belch? Kaoru-chan, I have to say, you're wrong.

Zheng Hanfei shook his head helplessly, Nan Ruoxun's starting point was very good, but unfortunately she walked into a fork in the road, which made it impossible for what she said to become evidence at all.

"It's boring!" Katie smiled disdainfully, took out the key from her pocket, and threw it to Nan Ruoxun, "You can see if you can open this door." ”

Nan Ruoxun took the key and inserted it into the lock hole, and the next moment, her face fell again, because the key was just right, and she could turn the lock, that is to say, her idea was fundamentally wrong.

"Wait!" Suddenly, Gujie yelled, "I see, I've found conclusive evidence!" ”

"Oh? What is it? Don't tell me it's still the key. ”

"That's right, it's the key." Gu Jie pointed to the key in Nan Ruoxun's hand and said, "If I guessed correctly, although this key is the same as the key in the conference room, it is missing one thing, that is, my fingerprints and Xiaofei's!" ”

"What?!"

"Because since I came out of the bathroom, Xiaofei and I have never touched this key at all." Gujie smiled slightly, and seeing Katie's reaction, he knew that he was right.

Whew~ Katie took a deep breath, looked at the time, and then slowly spoke, "I lost, I didn't expect you and Zheng Hanfei to not touch the key, congratulations, the second test passed." ”

“yh！” Gu Jie and Nan Ruoxun hugged each other and jumped up excitedly. This time, they joined forces and relied on their own efforts to solve the case.

"Is that the evidence you wanted to say before?" Katie glanced at Zheng Hanfei and asked.

"Yes!" Zheng Hanfei nodded, "I'm glad that Xiao Xun didn't give me the door another look at the key at that time, otherwise, this evidence would not exist, and they would only have to look for evidence room by room." Anyway, Diro should stay in the real conference room. ”

"Yes, I'm going to pick the lock and release him now." With that, Katie walked over to the real conference room. Now that the test is over, she doesn't open the door to the conference room, maybe she'll have to complain to her again when Diro comes out.

"Then we're not going, say hello to him for me." Zheng Hanfei smiled, "By the way, where is the third test?" ”

"Go up to the second floor." Katie stopped at the door and said, "President's office, you should know where it is." As for the way downstairs, I don't need to say any more. ”

"Thank you." Zheng Hanfei thanked him, and immediately shouted to the two who were still excited: "Don't make trouble, go to the last test place." ”

"Yes!" The two said yes and followed Zheng Hanfei to the last test site.

Later, the three of them learned that there were only two east-west corridors on the third floor, but the rooms at the easternmost end of the corridor that were not the conference room were warehouses, otherwise, they would not have used this technique.

……

"Strange? How could there be no one? knocked on the door of the president's office several times in a row, but there was no response inside, which couldn't help but make Zheng Hanfei feel a little puzzled.

"Maybe it's because they're afraid that we'll join the detective agency, so they ignore us." Nan Ruoxun said slightly angrily on the side.

"He's not that kind of person......" Just as Zheng Hanfei wanted to knock on the door again, a sweet voice attracted their attention.

"Zheng Hanfei, and you, why are you here?"

"Wan'er?!" Zheng Hanfei didn't expect Zhongli Wan'er to come so timely, and hurriedly asked, "Is Ouyang Xiu inside?" ”

"The president is not here. The president and vice president have just gone to the teacher's office. By the way, the president once said that if you pass the second test and find out that he is not in the president's office, you will go up to the school building to find them. ”

"Thank you. Oh, and one more thing, I'd like to ask, how many people are there in the Sherlock Detective Agency? ”

"This one!" Zhongli Wan'er smiled, "There are only five people in the entire club, including the president, the vice president, Sister Katie, Di Luo, and me, and if you can join, it will be eight people." ”

That's so little! Zheng Hanfei sighed, but although there are few people in this club, it is all the elite of the elite, no wonder it can become a well-known club that everyone dreams of joining.

"Thank you, Xiao Xun, Xiao Jie, we ......" Before the words were finished, a faint scream came into everyone's ears, and the faces of everyone present changed.

"What's going on?" Zheng Hanfei asked.

"The voice seems to be coming from outside the community." Zhongli Wan'er pointed in a certain direction and said, "It seems to be that direction." ”

"Isn't that a school building?" Nan Ruoxun said in horror.

"Let's go, let's see!" Zheng Hanfei shouted to the other three, and then hurriedly ran towards the stairs, he dared to guarantee that something must have happened in the teaching building, and the worst case would be a murder!