Liu Hang continued: "Someone came out of the locked door in the middle, at that time, Yan Muheng and I were hiding in the corner of the hexagonal room, the mechanism had not been opened, and it was pitch black, so no one noticed us. ”

The man was hunched over his back, unable to see his face or distinguish between a man or a woman, and he went straight out of the room on the left, and then I heard a sound like the wall was out of place. Maybe this is not correct, the friction between the wood and the wood does not necessarily mean that the wall is misaligned, but I do think so, I also asked Yan Muheng, he did not answer my question, but after the people left, he directly opened the mechanism. ”

"Did you hear that voice? Yan Muheng must have heard it too, this kid didn't mention it afterwards, including the matter of the mysterious person, wait a minute, I want to ask him well. Liu Qiao Pu said.

"But teacher, if his second personality appeared at that time, then it would be impossible for a normal Yan Muheng to know about the mysterious person and the voice." Xie Yunmeng retorted, and then he said to Liu Hang: "Xiaohang, can you be sure that Yan Muheng did not change at that time?" ”

"I can't be sure, but when Yan Muheng came down from the third floor, it was indeed very normal. And we only left the second floor of the main house for a few minutes, and after going down to the first floor, Officer Mei didn't see anything unusual about Yan Muheng? Could it be that he would change and recover in those few minutes? ”

There is some truth in what Liu Hang said, so far, all the people who have the second personality have been discovered, and after the personality is replaced, they have not recovered in a very short time, including Wen Yuya.

Liu Qiaopu said: "Xiaohang, go on, the incident you mentioned should be related to sand!" ”

"Yes, it wasn't until after the death of Sissy that I sneaked through the room that the mysterious man entered, and wanted to go back to the third floor, but I didn't expect that the walls there became very flat, like the building blocks that had been spliced back, so I stopped to check the walls, and at this time I realized that with a little effort, all the walls that I saw before, with wrinkled parts, can be removed, and those planks are all moving."

"It took me a few minutes to remove a few wooden boards, and inside the wooden planks, the wall was like a box, but the inside of the box was empty, and I felt that the wooden planks on the inside of the hollow wall were covered with sand, and the sand grains were very fine, and it was damp, and it was condensed one by one, and there was still water flowing down."

"When I uncovered the second layer of wooden planks with sand, I understood a little, behind the wooden planks, the whole large space is a huge water tank, looking at the extension, the water tank should lead all the way to the bottom of the hexagonal room is behind the locked door, that door I have also entered, inside is a narrow passage."

"At that time, I hung the chain from the inside, because that passage can lead directly to the room at the bottom of the third floor, as for why I don't want everyone to enter there too early, let Mr. Yun and Officer Xie explain it later, I will continue to talk about the sand problem now."

"If my judgment is correct, all the places between the middle of the hexagonal hall and the wall of the room on the left occupy a huge water tank, which means that the water in the tank must be very large, but after knocking on the periphery, I found that the water inside has all been drained, and the damp sand should be a gap in the wall with the water flowing, because there is also damp sand on the wall of the water tank."

"The time when the water was released was probably when the mysterious man entered there, but at that time I had no way of knowing what the water and sand were for?"