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After about 20 minutes, the police officers reported the results of the investigation, in addition to the ventilation openings leading to the outside had been welded dead, there were a total of 28 ventilation openings inside the police station, and about 12 bolts used to fix the partition were deliberately unloaded, which greatly surprised Zhen Shifeng's expectations. Pen "Fun" Pavilion www.biquge.info

"Twelve vents showing signs of loosening are scattered in various parts of the police station, and they don't seem to have anything to do with each other, are they just a trick on the part of the murderer?"

In this way, Zhen Shifeng can't lock down a specific point, but he can do something to many outlets without attracting everyone's attention, so this murderer first needs to be very familiar with the internal layout of the police station, and secondly, his identity must be special. Thinking about all this, then it is more logical that only the possibility of a police officer committing a crime is more logical.

In addition, the corresponding fingerprints were not extracted from the partitions of these vents, including in the director's office. In other words, the murderer must have committed the crime with gloves on. The deputy director continued. She is also a little uneasy in her heart, if she is really sure that she is an insider, then what is the status and face of the police? It is even more difficult to maintain law and order in City A.

"Although I don't want to admit it, I have to say that the murderer is very likely to be ......... our police department."

"Not necessarily, Aunt Deputy Director!" Wei Liqiu interrupted suddenly. I saw that his whole face was gray and dirty, and he didn't know that he thought it had just been dug out of some ruin.

"I said, can't you wash first......

"Well, it doesn't matter, the important thing is that my adventure in the ventilation duct has been very rewarding!" With that, he flipped out his phone, "Well, these are a few photos taken with the flash on, although they are a little blurry, but they can be roughly seen, look, what did you find?" ”

"Huh? It's a crawling trail. "The photograph shows the inside of the ventilation ducts, and the underside of the pipe, which was supposed to be covered with dust, is now being dragged out with a clear trace, apparently passing by the murderer.

"Yes, although wearing gloves can erase your fingerprints, such a dazzling drag mark cannot be erased. Following these traces, it is easy to find out the murderer's movements, and the room that leads to the end of the traces is the best shelter for the murderer. True to the old adage, the safest place is the most dangerous place. ”

"Could it be, that place?" Zhen Shifeng almost understood what Wei Liqiu meant.

"Located in the southwest corner of the first floor of the police station, a temporary detention center for prisoners!"

The temporary detention center, as the name suggests, is where arrested suspects are temporarily held, and it is also the most heavily secured and heavily guarded place in the entire police station, and it is almost impossible to turn the sky there. However, there are exceptions, and in order to ensure the safety of prisoners, five separate rooms have been set up inside the reception center to hold serious criminals or rioters who have behaved erratically. These five rooms, except for the small windows embedded in the door to see the interior, are all closed, but unfortunately do not include the vents above them, which gives the murderer a chance.

After a while, Zhen Shifeng, Wei Liqiu, the deputy director, and the two police officers of the detention center who were on duty that night rushed to the second room of the special detention room, while Bai Feng stayed at the scene. According to Liqiu, it is here that the traces of the towing disappeared, as well as the twelve places where the nets were loosened in the previous record.

"Then it is most likely that the prisoner who was held in room No. 2 last night was the murderer of the director. It's just ........." The deputy chief looked a little frustrated, because there was no one in the room at the moment, and she asked the officer on duty, "Who were the people who were detained here last night?" ”

"Well, it's four drunken guys, and it happened around midnight, and three of them got into an argument with the other guy, and then they got into a fight. That's why we put the four of them in these special detention rooms to prevent them from making trouble again. ”

"And where are the few of them now?"

"According to the rules, after they sobered up and apologized to each other, and made a simple note, they were let go, probably around six o'clock in the morning." The police officer on duty changed his words again, and suddenly said: "Oh yes, when it comes to the guy who is being detained in room No. 2, I have a deep impression of him." ”

"What do you mean by that?" Zhen Shifeng asked.

"That person is thin but can fight one against three, he is the most rushed among the four, but after he sobers up, he also has the best attitude, and he takes the initiative to apologize first, and the contrast between before and after is huge, so it left a deep impression on me. However, there is one small detail worth noting, we were going to lock him up in room 1, but he plunged into room 2 and fell asleep, so we had no choice but to put the other person in room 1. In addition, in the process of taking notes, the man said that he did not have his own papers, so we just recorded his name and address, and other ...... That's pretty much it. ”

"Is it just a name and an address? Anyway, go and bring the relevant transcripts, and I'll see them for myself. The deputy director commanded.

"Thin and powerful, he deliberately slept in the second room where the vents were made of hands and feet, and he left without leaving any more information, and I am afraid that the name and address are also fake. Obviously, this person has a major suspicion of committing a crime. Zhen Shifeng touched his chin, not knowing what he was thinking, but suddenly he asked another police officer on duty: "Eh, let me ask a question, do you have any special rules for patrolling on duty?" ”

"Regularity? Well, it starts patrolling for five minutes from the time of the shift, and then 20 minutes later, and so on. ”

"Oh, I see."

"Did Brother Feng think of something?" Wei Liqiu seemed to have seen through Zhen Shifeng's thoughts.

"If the police officer on duty has a 20-minute interval between each patrol, then the total time it takes for the murderer to leave the room and enter the ventilation system to assassinate Zhao Yunfei and return to the room must be within 20 minutes. Presumably you have already experienced it just now, Brother Liqiu, I don't know what the result is?"

"If the killer could be as thin and nimble as I was, the whole process would have taken 18 minutes. In this way, the police supervision system still has some shortcomings! ”

The deputy director of the "............" really can't refute it, but there is no way, in today's special period when there are many criminals and there are many cases and there is a shortage of manpower, it is indeed difficult for a strong man to be perfect.

At the same time, Zhen Shifeng carefully looked around this independent detention room of less than four square meters, there was nothing special in it except for some infrastructure, but because of this, there were more suspicions.

Then the most critical question is, how did the murderer bring the murder weapon into the police station, and how did he effortlessly break through these iron nets. As Brother Liqiu said, it only takes 18 minutes to enter and exit the room and complete the killing, but the whole process of removing the nets scattered everywhere to confuse the police's attention is by no means as simple as 18 minutes. So I speculate that the murderer entered the police station twice, the first time only bringing the murder weapon and removing the vents in various places, and the second time was the actual murder. ”