Hu Pingtao didn't speak. He sat quietly on the chair, looking at the big screen in front of him, lost in thought.

The two scenes are connected to each other, and the missing part in the middle is exactly the part where the burly man helps Zhang Hongxia from the gate of the community to the entrance of the unit.

He noticed the shooting time in the lower right corner of the two surveillance images.

The first segment is 12:08.

The second segment is at 12:12.

The picture on the big screen froze. Gu Dewei stood up, walked to the door of the conference room, and pressed the light switch. The entire venue returned to brightness.

Wang Xiongjie was a little surprised and asked quickly: "Xiao Gu, is there no more behind?"

Gu Dewei shook his head: "No more."

Zhang Yixuan immediately shouted: "That's wrong! Since he went in, he had to come out. There should be surveillance footage behind him!"

Gu Dewei's expression was grim: "I can't understand this at all. We went through all the subsequent surveillance in Jinchang Community. Until today when we arrived at the scene of the crime, there was no picture of the man leaving."

Wang Xiongjie said thoughtfully: "Then there are only two explanations. First: He is a resident of Jinchang Community, and after sending Zhang Hongxia back, he returned to his home. Second: He chose another way to leave.

"

Gu Dewei is a straight man, and he did not give the captain Wang Xiongjie any face: "Both speculations are not valid. Let's talk about the second one first: the surveillance probe facing the entrance of Building 21, which is Zhang Hongxia's residence unit, is not faulty.

The footage showed that the man did not leave after sending the deceased in at midnight yesterday. I asked all the residents from the fifth to first floors of the unit and the two surrounding buildings. There was nothing unusual in their homes, and they did not hear any movement at midnight yesterday.

"

"Let's go back to the first one: We checked all the residents in Building 21 and found no adult men with the same or similar physical characteristics as those on the picture."

Wang Xiongjie touched his chin and said to himself: "In other words, this person is neither a resident of Building 21 of Jinchang Community, nor did he use normal methods to leave Room 601?"

Zhang Yixuan frowned: "During the investigation this morning, I found two indentations on the aluminum alloy window sill in the kitchen of Room 601. After comparison, I can confirm that they are two footprints. I estimate that after the murderer killed Zhang Hongxia,

That’s where you left the crime scene.”

Zhang Guowei said: "Xiao Zhang, you said that I have also considered this situation. But you have to think about it, that is the sixth floor! The middle part of the cast iron drainage pipe on the outer wall of the kitchen is very long, and there are only the sixth and third floors.

Each has a connector. The pipe is close to the wall, with no attachments around it, and the wall is covered with ceramic tiles. Let alone ordinary people, even specially trained rock climbers would find it difficult to hold the drain in that situation.

Just slide safely."

Zhang Yixuan had thought about this issue before. He hesitated and said uncertainly: "...Maybe the murderer used some kind of auxiliary tool?"

Zhang Guowei shook his head: "I have seen the exterior walls and drainage pipes of Room 601. The surfaces are all smooth and there are no fresh scratches. Of course, I do not rule out the possibility that the murderer used auxiliary tools to escape from the sixth floor. But

Xiao Zhang, you have to consider other issues. If it is a rope, why did we not find such an object at the crime scene? Also, where is its specific hanging position?"

Zhang Yixuan frowned more and more, and he refused to admit defeat at all: "If it is hung on the drain pipe on the outer wall of the kitchen, a special knot is used. The main rope bears the load, and the auxiliary rope can be released by pulling on it. This is entirely possible."

"The possibility you mentioned is not high." Zhang Guowei disagreed: "The metal connection of the drain pipe in Room 601 is buckled on the right side of the outer wall of the kitchen, at least half a meter away from the window. Since it was a murderer who fled

At the murder scene, he must consider safety. Think about it, the effects of tying horizontal knots and vertical knots are completely different. If the situation at the scene is vertical knotting, I definitely agree with your statement.

But the problem now is that when you lean out from the kitchen window of 601, you can only tie the knot horizontally. In that case, it is impossible to tie the knot and tighten it hard, because the rope buckle will fall off if you use force."

After a pause, Zhang Guowei said seriously: "Unless it is a dead knot. But in this case, the rope can only be left at the crime scene."

Wang Xiongjie smiled and smoothed things over: "Don't argue anymore. Xiao Zhang, Dazhang, what you two said makes sense. Let's go to the crime scene tomorrow and take a closer look. Maybe there will be new discoveries."

He immediately turned around and pointed at the white-out picture on the big screen that was illuminated by lights: "Look here..."

Hu Pingtao suddenly spoke up and interrupted Wang Xiongjie: "Team Wang, I think there is something wrong with these two videos."

When someone is around, I call him Team Wang, and in private, I call him Brother Wang.

Hu Pingtao sat further back and his voice was loud. As soon as he spoke, everyone tilted their heads and focused their attention on him.

Wang Xiongjie smiled at him and gave Hu Pingtao a curious and encouraging look: "What did you find?"

"The first thing is time." Hu Pingtao stood up, pointed at the screen and talked: "The time difference between the two videos is more than four minutes. The area of ​​Jinchang Community is not large, especially the 21st building where the deceased Zhang Hongxia lived, from the gate of the community to

The entrance to the unit is only 120 meters away. Normal walking for an adult only takes one minute at most. Even if she was in a coma at the time and was being supported, the delay would not be too long on this basis."

Gu Dewei's eyes flashed with surprise.

Zhang Guowei squinted his eyes and looked at the screen, nodding frequently.

Tang Yuan said softly: "Interesting, if Xiaohu hadn't mentioned it, I really wouldn't have paid attention to this detail."

Zhang Yixuan was a little annoyed, but had to admit that Hu Pingtao did provide a detailed idea.

Wang Xiongjie smiled helplessly: "Xiaohu, you are stealing my lines! To be honest, I had thought of this just now, but before I could say it, you... I won't say it anymore, you

continue!"

Hu Pingtao smiled apologetically at him, then turned to Gu Dewei: "Brother Gu, please go to the first video and play it again."

Gu Dewei quickly walked to the door of the conference room, turned off the lights, and replayed the previous video.

"Look here." Hu Pingtao pointed at the screen and said: "This is a video of the man and the deceased just entering the gate of the community. He was supporting Zhang Hongxia and walking very fast. And here, twelve eight thirty-four

Seconds later, his action almost dragged Zhang Hongxia forward. Zhang Hongxia might have hurt her arm because he pulled her too hard, so she struggled for a while. The man supported her and changed her right hand from shoulder to waist.

, obviously increased the strength, but did not slow down the speed."

There was a lot of discussion in the venue.

"That's true. Xiaohu is right."

"I also overlooked this detail."

"Yes, this man changed his movements."

Hu Pingtao continued: "From the picture, the man did not have a backpack, but he wore two pieces of clothing. The temperature yesterday was as high as 30 degrees Celsius, and it was very hot even at night. Masks, hats, sunglasses, these things are all together

, there is only one message conveyed - he does not want to be recognized by others."

Zhang Guowei nodded repeatedly and slapped his thigh hard: "So when he entered the gate of the community, he hugged Zhang Hongxia and walked forward faster."

Gu Dewei's eyes also shone: "According to this analysis, he should often come in and out of Jinchang Community. He may even know the doorman and security guard, so he dressed up in disguise and left quickly after entering the gate to avoid being seen by acquaintances."

Tang Yuan frowned: "So he chose to send Zhang Hongxia home after twelve o'clock to avoid the doorman. He used Zhang Hongxia's access card to open the door. The security guard was sleeping at that time and was too lazy to ask. This time was very appropriate. This guy

Very smart.”

Zhang Wenxuan's head sank slightly, staring at the big screen with sinister eyes, without saying a word.

Hu Pingtao continued his analysis: "Building 21, Building 601, this is the legacy left to Zhang Hongxia by her grandfather. She rarely goes to her parents' residence and returns to Jinchang Community after work. The murderer should know this very well.

A little bit, so I chose to start here... It’s still the same question just now: Why is the time difference between the two videos before and after it as much as four minutes? Think about it differently, if I were the murderer, even if there is no one around in the dead of night, I still have to speed up and take Zhang Hongxia upstairs first.

, and entered the room. After all, the property management company has security guards responsible for patrolling at night. If they encounter one, everything will be exposed."

Zhang Wenxuan unexpectedly raised a new question: "Why was Zhang Hongxia in a coma the whole time? Ding Jian said during the initial examination of the body that the deceased had taken sleep-aid drugs. Could it be that Zhang Hongxia had already taken drugs when she entered the community?"

He is very stubborn, or it should be said that he is jealous of Hu Pingtao. Young people want to express themselves, and Zhang Wenxuan is no exception. Seeing that the questions raised by Hu Pingtao aroused everyone's discussion and thinking, Zhang Wenxuan was not to be outdone and wanted the same

Effect.

Zhang Guowei frowned and waved his hand to Zhang Wenxuan: "Xiao Zhang, wait for the matter you are talking about. Ding Jian's autopsy will take time, and it is still uncertain whether it is sleeping drugs. Let's take Xiaohu first.

Let’s clarify the issue. The time difference between the two videos is more than four minutes, which is indeed against common sense.”

Wang Xiongjie stared at the screen and said to himself: "This guy is quite strong. Four minutes... Could it be that he suddenly had an urgent need to urinate and couldn't hold it in?"

The consistent joke style does not affect the analysis of the case.

Hu Pingtao's voice was ups and downs: "This means that the man has something that he must do, even more important than hiding his identity and taking Zhang Hongxia upstairs."

This is a brand new hint, and it is also one of the most important mysteries in the entire case that Hu Pingtao believes. As long as this is understood, the case may be solved.

Everyone is thinking.

Wang Xiongjie put away the cynical smile on his face and turned to Tang Yuan, who was sitting opposite: "Old Tang, write down what Xiaohu just said and highlight the key points."

"I've already written it down." Tang Yuan was in charge of the meeting minutes. He picked up his notebook, opened the page he just wrote to Wang Xiongjie, and showed it.

Wang Xiongjie was very satisfied with Hu Pingtao's performance. He said to the audience: "Xiaohu is very good. He can think of this through the surveillance video and has provided us with ideas for solving the case. Think about it again, what else was discovered during today's investigation

Any mistakes or omissions? Bring them all up and let everyone discuss them carefully."

Hu Pingtao glanced at Zhang Wenxuan and said calmly: "The method used by the murderer to escape from the crime scene is also an important issue. I prefer the idea of ​​using a rope to assist. This is the most convenient and reasonable."

Zhang Wenxuan was stunned. He did not expect that Hu Pingtao was his supporter.

Zhang Guowei still maintains his previous attitude: "Xiaohu, this doesn't make sense! First of all, we did not find a rope at the crime scene. Secondly, neither the deceased's bedroom, the kitchen, nor the drainage pipes on the exterior walls can be connected normally.

Knotted at an angle.”

Hu Pingtao smiled and said: "Brother Zhang, that's not entirely the case. I've seen the outer wall of the kitchen and the surface of the drain pipe is a bit black, which should be traces of burning."

"Burned?"

Zhang Guowei was stunned. He repeated the word subconsciously, and his expression immediately became excited: "I understand, you mean, the murderer did use a rope. He slid downstairs along the drainage pipe, and then

Light a fire and burn the rope?"

Hu Pingtao nodded, but he didn't say anything: "This is just my speculation."

"Impossible!" Zhang Yixuan had a negative opinion: "From the sixth floor to the first floor, the height is more than 20 meters. Common wear-resistant ropes are usually climbing ropes or nylon ropes. I think the murderer should have used a live

Set the rope knot. First, play with the rope head more than 60 centimeters, then wrap the double rope heads around the drainage pipe, pass the right hand through the knot in the middle of the rope head, put the long rope through the rope head and bend it for a while to make a knot.

A looper, and then tighten it, so that the short rope leaves a rope end. Make another knot to tightly connect the rope end with the auxiliary rope. Do not touch it when descending. Just pull the auxiliary rope hard after landing.

The two loopers on top can be untied and dropped one after another."

"Besides, there must be traces of burning. I inspected it under Building 21, and the surface of the pipe is not black, so there are no traces of burning."

What he said was true, and everyone present nodded frequently.

Hu Pingtao insisted on his opinion: "If it is an extremely flammable substance and the high-temperature flame jumps up all at once, it will not burn the surface of the drain pipe."

Zhang Yixuan sneered and said: "This inference is not valid. If it is like you said, the rope itself is not strong enough, the murderer would have fallen to his death during the descent."

Wang Xiongjie noticed that the conversation between them was full of gunpowder, and others also felt that Zhang Yixuan's words were full of hostility towards Hu Pingtao.

"This is not the point." Wang Xiongjie smiled and smoothed things over: "Xiaohu, Xiao Zhang, today is just the first analysis meeting of the case. As the case progresses, there will be many opportunities for discussion. The key now is the murderer's motive. I think you

Let’s temporarily change our thinking and start from this aspect.”
Chapter completed!