Conan frowned, he stared at the copper lock for a long time, but the copper lock was still a copper lock, there was nothing abnormal, he shook his head, and said confusedly: "I still can't see it." ”

Li Canghai smiled indifferently and said: "Brother Nan can't see it, it's because Brother Nan has fallen into an 'obstacle', this copper lock itself is not abnormal, I said that this copper lock is just a prop used to confuse us, and it has no substantive effect." The murderer took great pains to set up the scene into a perfect secret room, and he thought of almost everything possible, so he broke the lock cylinder. But this is precisely the murderer's most self-inflicted cleverness, but he ignores a very important point. ”

"Which point?" Conan asked.

"The door is locked by iron chains, and the iron chains are wound together through two copper rings, after being impacted, the copper ring behind the door on the right side is directly knocked down, and hung on this iron chain, in this case of force on one side, the copper lock will only follow the iron chain at the same time, how can this copper lock be hit and fly out?" Li Canghai asked rhetorically.

Conan's eyes lit up suddenly, and he suddenly understood, and he suddenly realized: "So that's the case!" This is indeed a suspicious point! ”

What Li Canghai said made everyone feel confused, except for Conan, everyone else listened in a fog.

Conan explained: "Actually, the matter is very simple, after killing Hongmei, the murderer did not lock the door with a copper lock, but threw the copper lock on the ground, and just closed the door with an iron chain. When we can't push the door, we always subconsciously think that the door is locked from the inside, especially after seeing the copper lock on the ground, we are even more convinced of this concept. The murderer took advantage of this and made us a fake secret room. ”

Zhang Wenyuan frowned and said: "Although what you said is also reasonable, but this doesn't mean anything, when you hit the door hard, it is difficult to say that the cylinder of the copper lock will not break?" ”

Li Canghai nodded and said: "Yes, I'm afraid this is what the murderer didn't expect anyway, the murderer thought that when the door was knocked open, he would break the copper lock, but he didn't expect to pull the copper ring on the right side of the door down." And this is the only negligence of the murderer, if it weren't for this negligence, I'm afraid this would really be a perfect closed room murder case. ”

Zhang Wenyuan still shook his head, and he said: "Even if it is true as you said, the murderer made a fake secret room, but this is not reasonable. If the door of the broken man's room was only entangled in chains and not locked, wouldn't the murderer's arrangement be worthless? ”

"That's right, it's a bit risky, and if someone finds out, it will fall short. If you can think of it outside the staff, the murderer can naturally think of it, but it is not difficult to solve this problem. As long as the person who broke the door was none other than someone else. Li Canghai glanced at the masked man and said deeply.

Conan suddenly realized, he nodded: "Yes, as long as the murderer is the one who broke the door first, no one will find out the clues." ”

Zhang Wenyuan clasped his hands to his chest and recalled: "I remember that the first person to break the door at that time was ....... ”

"That's right, he is the murderer who killed Hongmei, Yu Chengen!" Li Canghai stared at the masked man and said deeply: "So far, don't you dare to take off the mask?" ”

As soon as these words came out, everyone was stunned.

I saw that the masked man slowly took off the mask on his face, revealing a face that made everyone stunned, who was it not Yu Chengen?

Zhang Wenyuan looked at Yu Chengen in a daze, he never imagined that Yu Chengen was the murderer of Hongmei.

Yu Yanrou's face was also pale for a while, her shoulders trembled slightly, she bit her lip lightly, and her eyes were full of worry.

Conan also shook his head and sighed again and again, who would have thought that Yu Chengen, who had been enthusiastic about helping them investigate the case, would be a murderer?

Even Li Canghai was sorry for a while, and in the past few days, he could see that Yu Chengen was a person with ideals and ambitions.

In several conversations, he expressed his concern about the Tang Dynasty, and even bluntly pointed out that An Lushan would rebel sooner or later, and felt indignant at Yang Guozhong and other traitors controlling the government.

To be honest, Li Canghai didn't want Yu Chengen to be a murderer, and he even planned to recommend him to Cui Jian after this incident. However, what he least wanted to happen, it really happened.

"Yu Chengen! You wolf-hearted brute, for Rou'er's sake, I treated you with courtesy, but you killed my concubine? Say, why did you kill Hongmei? Zhang Wenyuan was extremely angry, pointed at Yu Chengen's nose with his finger, and roared angrily.

Yu Chengen's face was expressionless, he glanced at Zhang Wenyuan coldly, and snorted in a low voice: "I'm a beast?" What are you? ”

"You! Lao Tzu slaughtered you! Zhang Wenyuan roared angrily.

"Stop!" Yu Yanrou suddenly shouted anxiously.

"Rou'er, get out of the way! Although this guy is your brother, he killed Hongmei, I will kill him to avenge Hongmei! Zhang Wenyuan said angrily.

"Wait!" Li Canghai glanced at Zhang Wenyuan and said lightly: "If you kill him, you will definitely regret it." What's more, even if you want to kill him, you have to wait until everything is clear before you can do it, otherwise wouldn't the dead be very wronged? ”

Zhang Wenyuan snorted, pointed at Yu Chengen and said viciously: "I'll let you live for a few more moments!" When everything is figured out, Lao Tzu will slaughter you with his own hands! ”

Li Canghai looked at Yu Chengen calmly, and said lightly: "Let's talk about it, why did you want to kill Hongmei?" ”

Yu Chengen stared at Li Canghai and suddenly laughed: "Brother Li, what you just said is indeed very exciting, but what does this have to do with me?" I didn't kill anyone. ”

Li Canghai sighed, and said very regretfully: "Brother Yu, don't you still admit it until now?" ”

"I haven't done it, so why admit it? On the night of Hongmei's death, I was in my room all night, as evidenced by this. Yu Chengen said indifferently.

Conan also frowned, and said: "Yes, this is indeed a suspicious point, you said that he killed people, but he was in the room all night and never went out at all, how can he kill people?" ”

"No, he went out." Li Canghai looked at Yu Chengen deeply and said, "You deliberately got drunk, and then let Liangchen serve you, so that your alibi is reasonable." Remember when I said that Hongmei died between midnight and early morning? But during this time, no one left the room, except you. ”

"Brother Li, are you mistaken? I've been drunk all night and haven't been anywhere, so if you don't believe me, you can ask for a good day. Yu Chengen said lightly. (To be continued.) )