The door lock in front of Dulin is not much different from the general anti-theft door lock, the anti-lock device is a metal rod that can move up and down above the lock body, after the apartment door is closed, the deadbolt in the lock body, which is commonly known as the "lock tongue (the author's hometown is generally called this, I don't know what readers and friends call it, welcome to leave a message)" pops up, locks the door, and then manually presses the metal rod down, and jams the bolt from the rear to make it unable to move, and it also achieves the effect of locking the door inside the door. The quality of this lock is still quite good, and there was no damage to the lock body after Li Xian hit the door before, and the anti-lock lever can still work normally.

Dührin experimented with the strength of the anti-lock lever and found that it didn't take much force to press the metal rod down. Dührin repeatedly pressed down, pulled, pressed, and pulled back the lever to get a feel for how much force it would take to lock the door.

Looking up along the position of the anti-lock lever, there was a small hole about two millimeters in diameter about five centimeters away from the door lock on the inside of the apartment door, and the small hole penetrated the iron sheet on the inside of the iron door, but no matter how Du Lin looked, he couldn't see what the small hole was for.

Because the door is made of iron, there are a few bills and notes attached to the inside of the door with magnetic hook and loop, so it seems that this small hole should not be for hanging things or other functions, and Duhrin touched it with his fingers, and found that there were fresh burrs on the edges, which looked like they should have just been drilled recently, so it was very suspicious, and it was estimated that it was probably related to the "secret room".

Du Lin looked around, found a disposable chopsticks in the kitchen, just enough to insert into the small hole, Du Lin folded the chopsticks off a section three or four centimeters long, held it with his hand and put it on the anti-lock lever, moved up and down a few times, and found that it was quite suitable: lifted up, just blocked by another section of chopsticks inserted in the small hole, pressed down, just pressed down the anti-lock lever, and locked the door.

Du Lin thought about it for a while and called Wang Jieshu, who was conducting a peripheral search for evidence against Hu Siguang and Wen Man.

"Lao Wang, can you check the recent online shopping records of Hu Siguang and Wen Man, and see if there are any electric drills or other special things?"

"It's really time for you to make this call, I just came out of the technical department, and there are really things you asked, you wait," the sound of turning the paper came from the other side of the phone, "Eight days ago, Hu Siguang bought a hand-held electric drill on a certain treasure, and at the same time bought a few small props for playing magic in a magic supply store, this thing...... Alas, how to say it, I don't know how this thing is used, I'll introduce it to you and send it to WeChat. ”

"Okay, you send it, I'll wait for you. Dohrin hung up.

In a moment, Du Lin's WeChat received several pictures from Wang Jieshu, which are paper copies of several web screenshots, one of which caught Du Lin's attention, this picture is a child's toy-like thing, the main part is a cylindrical object with the thickness of a little finger, and a hose is attached to it, and the other end of the hose is an air bag, the introduction says that the main use of this magic prop is to hide the air bag under the foot or under the tabletop in a close-up magic trick, squeeze the air bag with your feet or knees, and the gas in the air bag enters the cylindrical object at the front end through the hose, and under the action of air pressure, a short rod will extend out of the cylindrical endto trigger a pre-arranged trap by the magician to achieve the effect of triggering the trap without using your hands.

Durin thought for a moment, isn't this the kind of hat in the shape of rabbit ears that children often see on the street? There is a hairball hanging on each side of the hat, and there is also an air bag hidden in it, as long as you grab the hairball, the rabbit ear decoration on the hat will stand up.

Durin immediately understood how this so-called "secret room" was created, that is, using this prop.

The situation that day should be roughly like this: after Hu Siguang deceived Zhou Peihao's door (of course, it may also be that Wen Man gave him the key), while Zhou Peihao was not paying attention, he smeared the anesthetic "mocaine" on his body, which made Zhou Peihao lose his mobility, and then tied his hands and feet behind his back, placed him on the ground, and then calmly arranged all the organs, and after the arrangement was completed, at eight o'clock, Hu Siguang went to a friend's appointment, and at almost ten o'clock, Wen Man also left...... Wrong!

Du Lin suddenly realized a problem, and he immediately made a phone call to Li Xian.

As soon as the phone was connected, he heard a mobile phone ringing outside the door, and then Li Xian pushed the door into the scene, if it weren't for Du Lin's super fast reaction speed, he hid to the side in time, and was almost slapped on the wall by the door. 97 Chinese

"Yo, where are you here, calling me? I just arrived, what's the matter?" Li Xian put away his phone and asked.

"I suddenly found a problem, we were suspicious of the wrong object at the beginning, at least we shouldn't suspect Hu Siguang alone. Durin said solemnly.

"You mean Wen Man was also involved in the murder?" Li Xian also became serious.

"Yes, at least one of the two main culprits. ”

"Tell me about it. ”

"Come, let's go through the entire process of the case, which is what you often call 'case repeated', now you are Zhou Peihao, I am Hu Siguang, I will go out now, you open the door for me." ”

After saying that, "Hu Siguang" turned around and went out of the door, and then knocked on the door twice outside, "Zhou Peihao" opened the door, "Hu Siguang" made a gesture and wiped twice on the back waist of "Zhou Peihao", "Zhou Peihao" fell to the ground, "Hu Siguang" tied up "Zhou Peihao", and then arranged the mechanism in the house, and then closed the door and went out.

"That's it, that's probably the process, right?" asked Li Xian.

"No, no, there are a few big loopholes here," Du Lin said, "First of all, Zhou Peihao knows that Hu Siguang and Wen Man have some unclear relationship, otherwise he would not slap Wen Man in front of the public, he is unlikely to open the door to Hu Siguang, even if the door is opened, his attitude towards Hu Siguang is not much better, he will definitely be hostile to him, Hu Siguang will not have the opportunity to wipe the 'mocaine' on Zhou Peihao's waist." ”

"Well, it's unlikely, Zhou Peihao will definitely be wary of Hu Siguang. ”

"Second, if you want to make the room a secret room, the key is to the last person to leave this room, but Hu Siguang left before eight o'clock, and as far as I know, the last person to leave this room should be at nine o'clock and almost ten o'clock. ”

"Hey, isn't that right? How do you know that the last person to leave left was after nine o'clock?" Li Xian wondered.

"I can't explain that, but I know it. Du Lin didn't want to tell Li Xian about the "blood illusion".

"Oh......" Li Xian suddenly whispered, "'That thing' told you?"