"Indeed, the rule of the customs warehouse park is to patrol once an hour.
"Actually, just looking at it like this, you can't see anything, this extremely fast video is actually just an introduction."
Si Junnong shook his head, closed the video, opened another folder, clicked on the picture file, and said, "Let's take a look at this again." ” "In this video, the security guards appeared a total of three times before and after, and we, the three videos that appeared, each of the three frames were split separately, each selected 30 frames, and spliced into 30 pictures, each picture is made up of the photos in the three videos one by one, you see."
As the pictures were lowered one by one, Yuan Youchong and Yu Chen's brows were twisted.
Seeing their expressions, Si Junnong knew that they also saw that something was wrong.
Sure enough, Yu Chen said solemnly: "The three photos on each picture, the demeanor, movements and even the diffuse halo of the flashlight are all exactly the same."
"Yes," Si Junnong said, "Moreover, we used software to try the overlapping stack of these photos to compare them once, and found that except for the white transparent time display subtitles on the top, everything else was completely overlapping." ” After a pause, he emphasized: "Well, it's every pixel, and it corresponds one by one." ” "Someone has done something on video."
Yuan Youchong said: "They cropped out a video captured by the surveillance, looped it repeatedly, and saw that the actual footage captured by the surveillance was overwritten. ” "Yes."
Si Junnong nodded: "Obviously, the customs monitoring system has been invaded. ” "Well, this kind of situation where a suspect intrudes into the surveillance system and changes the surveillance video screen to cover up his criminal behavior is also encountered by our investigators from time to time, and in most cases, it can be divided into two categories."
"One is to fix the video screen, which is relatively easy to see flaws."
"The other type, like this, is to monitor the previously recorded footage in a loop, in order to cover the video file recorded later, this type, it is relatively not easy to see the clues, and the longer the video is intercepted and looped, the more difficult it is to be found abnormal."
"As for the time subtitles on the surveillance video, it's actually easy to get your hands on."
"Well," Yuan You nodded and said, "I remember that one of the victims of the corpse mutilation case in Fujiang District eight months ago seemed to have called Ban Yingying to investigate her husband, and found that the surveillance of their house showed that his husband had been playing on the computer in the living room until late at night, and he was not suspected of committing a crime. ” "Is it" Si Junnong was stunned: "Team Yuan, you even remember this" He waved his hand to bring the topic over and asked, "Where is the location of this surveillance, is there a problem with this surveillance alone, or is there a problem with all of them?"
"Location" Si Junnong said: "This is the import warehouse of dangerous goods No. 7 monitoring of the third warehouse, specifically, located on the west side of the warehouse to the south.
Well, the third warehouse of dangerous goods is a stolen warehouse. ” "In addition, there are seven problematic monitoring, which can be determined at present, three of which are located around the three dangerous goods warehouses, respectively, on the west side, the west side of the south and the south side, and the other four monitoring are distributed on the road from the fence wall on the west side of the warehouse park to the three dangerous goods warehouses."
"And the monitoring that can exclude the video screen being covered, there are currently more than 40 marked, including the other nine around the third warehouse of dangerous goods in the import warehouse."
"In addition, there are many monitors that cannot be determined whether there is a problem for the time being, mainly the monitoring inside each warehouse, because there is no one in the warehouse at night, it is a static picture, and it is not easy to be found if someone moves or feet."
"What we mainly pay attention to is the monitoring in the No. 3 warehouse of dangerous goods, but unfortunately, because of the reasons just mentioned, we can't be sure whether this monitoring has been tampered with."
"For the rest, there are still a lot of surveillances that haven't had time to go through properly.
The supervision warehouse park is so large, and monitoring is naturally indispensable, if you really want to go through it thoroughly, it is impossible to complete it in a short period of time with our manpower. ” After listening to him, Yu Chen pondered for a moment and said: "Can you determine that there is a problem with the monitoring, located on the west and south sides of the stolen warehouse, and the section from the fence wall on the west side of the warehouse park to the stolen warehouse. ” "We think so too," Si Junnong said, "so I think we should focus on checking this section of the road, or the monitoring of this area, and put down the other directions first, otherwise we will really have to delay too much time." ” "Well, the investigation should naturally have a clear direction."
Yuan Youchong agreed, and then asked: "Can you determine the time period when the surveillance video is passive?"
"There's no way to know for sure."
Si Junnong shook his head and said, "However, it can be roughly inferred. ” "For example, in the video you just saw, when the security guard first appeared, the surveillance video must have been recorded normally.
And when the security guards assigned to patrol in the video finally change their demeanor and movements, the monitoring will definitely return to normal work, and the same is true for other monitoring. ” "Therefore, combined with the video recorded by the seven monitoring positions, it is inferred that the time when the video file is wrong should be at 2:28 a.m. on the day before yesterday, that is, on the 18th, to 5:46 a.m."
"In other words, the suspect made a move during this time."
Yuan You shook his head, and then muttered: "Sure enough, they committed the crime at night, but the question is, how did they take things that weigh more than two tons out of the monitoring park?"
Yu Chen couldn't think of a reason, so he could only propose: "It's better to investigate the path that the suspect has traveled first, and see if we can gain anything." ” Yuan Youchong pondered for a moment and nodded in agreement: "That's the only way."
Well, it was decided at noon, and the matter of contacting the customs staff should be put aside for the time being, and then check this section of the road first.
Well, Anon, what else have you discovered?"
Si Junnong shook his head: "That's it for the time being, if you want to find other discoveries, I will inform the two of you as soon as possible." ” "Okay, then we won't stay here any longer, you can keep busy.
Well, thank you guys. ” "It's nothing, it's our job."
After walking out of the monitoring room, Yu Chen was obviously relieved and said: "It can be regarded as roughly determining the time of the suspect's crime, and we can be regarded as taking the first step in this case."
"yes, barely opened up the situation."
Yuan Youchong said with a smile: "Moreover, the harvest is not only that my colleagues can go to the traffic management bureau and the surrounding shops to obtain monitoring, so I will adjust the monitoring on the west side of the warehouse park in the early morning of the 18th to see if there are any suspicious people entering and leaving this area."
"Torture and murder :