Seongnam has a great love for reasoning, and he remembers that there are two secret room murder cases in Conan's movies, one of which has a secret room construction hand hair that makes a small hole in the glass attached to the door bolt, and then uses the wire to put the door bolt down after the person goes out. The other secret room construction method is more complicated, which is to remove the entire window and paste it back after the person goes out.

"Could it be that someone watched Conan's TV and quoted his scenes to kill people?" Seongnam thought, but the idea was quickly shattered.

Because when Chengnan stood behind Officer Zhang Mei and looked at the window carefully, he found that there were no small holes in the glass of the window, and the window was built into the wall around it, and it was obvious that there would be traces if he wanted to take out the whole window, but the surrounding area of the window was intact, and there was obviously no trace of human touches, so that both methods were ruled out, so how did the murderer escape?

Cheng Nan also began to be puzzled, thinking of the Lin Kexin incident that Officer Zhang Mei said just now, Cheng Nan was shocked: "Is it really a supernatural incident?" ”

But then Chengnan shook his head and dispelled his ridiculous idea, he actually aspired to be a famous detective, in his heart except the truth is the truth, what could have such a ridiculous idea, this matter must be man-made, but he has not found a clue for the time being.

Seongnam thought as he looked carefully at the window, hoping to find some clues on it, and finally found a small toothpick on the table by the window.

"Toothpicks?" Seongnam's eyes lit up, and he actually screamed out in excitement.

Although Seongnam screamed quietly, it was still heard by the female police officer.

Zhang Mei turned her head to look and found that Chengnan actually followed, and shouted, "What are you doing!" Didn't I say you weren't allowed to come in? Get out! ”

"Meow!" As Zhang Mei stopped drinking, a black shadow under the table in front of her suddenly burst out, and rushed towards the door from Chengnan's side with a snort. It just disappeared into the dark corridor in an instant.

"Ahh The black shadow ran under Zhang Mei's feet, and the soft feeling made Zhang Mei startled.

"What's that!" Zhang Mei was facing the south of the city just now, and the sight in this room was dark, so she didn't see clearly what the black shadow was just now.

Because the view of this room is not good, and the black shadow just now ran too fast, Chengnan only saw a black animal running past his feet, what is it is but it is not clear, but hearing the cry just now, Chengnan thought that it might be a black cat, so he said: "I don't know, but listening to its bark just now, it should be a black cat." ”

"Cats?" Zhang Mei frowned and wondered, Zhang Mei's first reaction was that this cat was a little strange. Because according to common sense, cats are very timid, when Han Xiao kicked open the door just now, the cat should have already been frightened, but when Zhang Mei came in, she didn't see the cat, obviously it had been hiding under this table just now.

However, just when Zhang Mei was full of doubts, four policemen came to the door, and one of them, an old policeman who was about forty years old, saw Zhang Mei and shouted: "Zhang Mei! What the situation. ”