As I spoke, we had already arrived at the duty room located next to the gate on the first floor of the detention center, and I was slightly relieved to see the two prison guards who had been on standby to stay in the duty room, because if the modus operandi in my heart was correct, then from the fact that they were half a head shorter than me, we could basically rule out their suspicion. Pen & Fun & Pavilion www.biquge.info

In fact, through the inspection of the cell and the corpse at the scene of the crime just now, Mu Zihan and I have already made a general inference in our hearts about the modus operandi used by the murderer in this case.

Moreover, speaking of which, this technique is actually quite simple, the basic operation steps are: first hang a rope of sufficient length from the roof of the building to the window of the cell; Then through a window about 2 meters above the ground, the rope was pulled into the cell and put around the neck of the deceased, who had been stunned by Ge Luofang at that time; In the end, the killer only needs to leave and lock the cell, go back to the roof, and pull the rope tightly to strangle the deceased. and create the effect of killing people in a closed room.

Moreover, as long as the middle of the whole rope was pulled into the cell at that time, and the ends of the rope were left on the top floor, then after strangling the deceased, the murderer only needed to pull one end of the rope to recover the murder weapon.

That's why the two guards, who are only about 170 centimeters tall, can only have their heads level with the bottom of the window, even if they step on the only red plastic stool in the cell that can be used to cushion their feet. In this case, it is very difficult, almost impossible to reach out and pull the rope hanging from the window into the cell.

After we were all seated, Mu Zihan asked first, "Both, who among you was the first person to discover this case?" ”

"It's me." One of the thinner guards replied: "I saw that it was time to turn off the lights, so I went to check the lights out in the cells." Then when he passed by the cell at the scene of the crime, he saw that the food delivery opening on the door of the cell was still open, so he looked inside to determine the situation of the suspect Zhang Cheng. ”

While recalling the situation at the time of the crime, he said: "Then, I saw Zhang Cheng lying on his side on the ground, motionless, and I called out to him several times in a row, but there was no response. Seeing that the situation was a little wrong, but considering that it was possible that the suspect deliberately disguised himself to open the door and took the opportunity to escape from prison. So I went back to the duty room as fast as possible to get the key, and at the same time, I was able to contact my colleague on the third floor to confirm the lights out, and the two of them met before returning to the cell to open the door to check the situation. It turned out that he was dead, and we immediately called the police. As he spoke, he gestured to another chubby prison guard sitting beside him.

I have to say that the prison guards are indeed police officers, and the description of the crime is not only professional, but also very detailed, so that we can quickly understand the situation at that time.

"Oh, did you see anyone else on your way back and forth between the duty room and the cell at the scene of the crime?" Mu Zihan then asked.

"Nope. At that time, there should have been only the two of us on duty in the detention center, so if we had seen a suspicious person at that time, we would have kept him. The skinny guard continued.

"Then before that, when did you meet Zhang Cheng? Moreover, when I met him, he did not behave abnormally. Mu Zihan asked again.

"I met him at dinner, because I was also the one who was in charge of distributing dinner to him tonight, and the time was about 6 o'clock in the evening, because the dinner time in our detention center is 6 o'clock in the evening. Moreover, because he is special and the leader has explained that he is not allowed to leave the cell without permission and eat together with other suspects, so his three meals are brought to him by our prison guards. When the thin prison guard said this, he was silent for a while, as if he was reminiscing, to see if there was any abnormal behavior that Mu Zihan said.

After a long while, he spoke again, and said with a little hesitation: "As for the abnormal behavior, it seems that there is nothing abnormal. It's just a little different. Around 6:30 a.m., when I went to collect the dinner utensils, I found that he had already slept at that time, and he usually doesn't go to bed so early."

"Oh." After Mu Zihan responded, he also thought about it.

Seeing that everyone was silent, I couldn't help but interject and ask, "Then may I ask if the key to the cell is only in the duty room?" Do you have a spare key? Also, did you leave the duty room where the keys were stored together from 6 p.m. to the time of the crime? ”

"The keys to the cells on each floor are stored separately in the duty room on that floor for safekeeping, and there is absolutely only one, and there is no spare key." When the prison guard heard my question, he didn't answer immediately, but looked at me, hesitated, and said only after seeing Director Lu nod in agreement. It seems that my question may have touched on the secrets of the detention room, so he dared to answer it only if the leader agreed to do so.

As he spoke, he also pointed to the rows of keys hanging on the side wall of the duty room and locked in glass cabinets, indicating that these were the keys to the cells on the second floor, and that the number on the keys did not correspond to the number of the cell. Moreover, if the cell at the scene of the crime is still hanging in the glass case at this moment.

After seeing me nod, he added: "As for the time for us to leave the duty room together tonight, it is only during the two periods of time when we go to distribute dinner and turn off the lights. The rest of the time, basically one person stays in the duty room and goes to patrol alone. ”。

"That means that if the murderer wants to take the opportunity to steal the key to the cell and sneak into the cell of the deceased, the only time you can go and distribute dinner in the evening is a short time." I thought about it and asked, "By the way, are you sure that the key is still in the cupboard after the delivery?" After all, there are so many keys in the cabinet, and one or two are missing, so it's not easy to be found. ”

"This, no." The prison guard replied embarrassedly: "Because this glass cabinet is also locked, usually locked, with keys, they are all colleagues, so ......" He was a little embarrassed to say that he couldn't continue, after all, if they had counted the keys to the cell at that time, they might have found that if they were stolen, they might have been able to avoid this murder.

It's just that, in fact, we all know that they can't be blamed for this situation, we can only say that the murderer knows too much about the internal situation of the detention center and effectively takes advantage of any loopholes.

"Do you remember who came to the duty room after dinner?" I continued to ask. Since the key was in the cabinet at the time of the crime, this means that the murderer had come to the duty room afterwards and secretly put the key back in the glass case.

"That's a lot, Lao Liu, Xiao Li, Jia Jinkang...... By the way, the director seems to have been here too, and there are a lot of people, and they have all been here after dinner and before they go home, and I can't remember exactly. The prison guard recalled.

"Oh." I regretfully responded, so many people, the scope is still too large.

(To be continued)