Chapter 1307: Surveillance Analysis

As soon as Liu Jinghui finished speaking, the faces of many people around changed.

Poisoning, or prisoners poisoning, or poisoning in the cafeteria—the dangerous elements were all gathered.

Prosecutor Lin Qingyun didn't care about so much. He came to find problems and pick faults. As a prosecutor who has handled many cases, Lin Qingyun asked with experience: "Was the food in the cafeteria sealed on the day?"

Prison Warden Old Qin immediately turned his head to look at the section chief of the internal prison investigation section.

The internal prison investigation section is originally for handling cases in prison. 4,000 criminals are detained in a prison. Regardless of how strict the system is, they can definitely find ways to commit crimes.

And before reporting to the above, the on-site disposal in the prison is also completed by the internal prison investigation section.

Section Chief Wei Jinchuan was forced to come out, frowned and said: "When we arrived, Zhang Jifeng had already been sent to the hospital. When we were disposing of the scene, there was no food at the scene."

"How was the food disposed of? What about the Life and Health Section?" Prison Warden Old Qin shouted, and only then did someone squeeze in.

Work involving eating, drinking, and defecating is all the responsibility of the Life and Health Section in the prison. Changyang Prison's Life and Health Section has a total of 5 people, one section chief, two deputy section chiefs, one chief staff member, and others. With so few people, it is impossible to manage the cafeteria and other things in detail. At most, they manage procurement and other businesses.

Therefore, the section chief of the Life and Health Section who was called was also helpless and said: "We were in the office building at the time, and we didn't know what happened specifically. We only thought Zhang Jifeng had a disease, heart attack or something. It was the time for dinner, and people who went to work came over to eat. The things in the cafeteria should have been eaten. The problem is that no one reported stomach pain or anything. Everyone else is fine!"

"The ambulance came, and you didn't take it seriously!" Old Qin was furious.

"No one really told us. And, the cafeteria didn't stop at the time. No one thought of poisoning." The section chief of the Life and Health Section answered carefully. Whether it was true or false, I don't know. Anyway, what others think is unclear.

"Look at the surveillance, see how the food was disposed of later." Liu Jinghui often visits the military, knows that now is not the time to watch the fun. By then, the case hasn't unfolded yet, and if the prison is frantically shifting blame, their follow-up work will not be easy to do.

The police officer sitting in front of the nine-grid screen was under great pressure to adjust the time and transfer more videos before and after the incident.

This step was much more cumbersome. Unlike the previous videos that could be prepared in advance, he couldn't help but be flustered.

Jiang Yuan took the initiative to step forward and said: "How about I do it?"

The police officer first looked at the prison warden, got tacit permission, and then asked Jiang Yuan: "Then I will tell you how to use this set of systems?"

"Sure. I'll try it first." Jiang Yuan actually knew how to use it. Although there are many types of surveillance systems and many are non-standard products, they are actually much the same. Professional image investigation police officers might have discomfort when changing to a set of systems, but Jiang Yuan's LV3 technical defense surveillance technology covers the whole set of technology.

Of course, Changyang Prison uses the Hikvision that was returned from centralized bidding. Even if there are any specific needs, for the basis of this kind of surveillance system, it is still something within the blueprint range.

Therefore, Jiang Yuan said he would try it, but his hands knocked on the keyboard, fiddled with the console a few times, and in front of the other party, he checked the system log from the beginning, then checked the equipment status, and then classified the corresponding videos according to "time classification," "channel classification," and "event type classification."

And the police officer responsible for operating the surveillance at the scene actually only knew some basic operations. If he had doubts about Jiang Yuan's fast retrieval of logs and reading methods, just Jiang Yuan's skilled video classification made him understand that things were not simple.

He couldn't help but look at the third-party operation and maintenance personnel on the periphery of the crowd with a look for help.

The other party also saw Jiang Yuan's operation and gave an awkward smile.

"Report the number!"

"One, two, three..."

Jiang Yuan released the sound of the surveillance and turned it up.

Everyone's eyes were immediately attracted by it.

What Jiang Yuan released was exactly the scene in the cafeteria when the incident happened.

The interior of the prison cafeteria was built and decorated the same as the cafeteria in the school. Changyang Prison has about 50 tables, all for four people. The tables and chairs are all steel and integrated. The table legs and chair legs are also all welded to the ground. The ground is all polished floor, not good-looking, but at a level that is enough.

In the surveillance screen, at this time, a team of prisoners had just finished eating, reported the number in a team, and went to wash the bowls.

At the same time, another team of prisoners entered in a line. After arriving, they didn't sit down immediately. They still reported the number in a team, then came to their respective fixed positions, then watched people serve rice into their bowls, and finally, with an order, sat down in unison, and then... started singing, and then reported the number.

Finally, it was the time for wolfing down. It was less than 5 minutes in total. They could eat as much as they could, and if they couldn't eat, they had to get up and leave, because prisoners in another prison district were already waiting with bowls next to them.

Jiang Yuan watched several videos from different angles and finally confirmed: "The things made in the cafeteria kitchen were indeed eaten."

Prison Warden Old Qin breathed a sigh of relief: "It shows that even if there is poison, the poisoning was not put in the things in the kitchen."

"That's not necessarily true. Maybe after being divided equally, the dosage was too small. Maybe the triggering of the poison has conditions, such as oral ulcers." Jiang Yuan first denied Old Qin's idea, and changed the subject: "However, I didn't see Zhang Jifeng eat anything."

As he spoke, Jiang Yuan started throwing various videos onto the screen in front of him, making everyone dazzled.

Prosecutor Lin Qingshan, who often cooperates with the police, had never seen such a thing. He looked left and right, felt that Liu Jinghui was more reliable, and asked: "I thought we were in a case discussion meeting to determine the investigation direction."

"If you can directly determine the result of an investigation direction, isn't it faster." Liu Jinghui naturally wanted to support Jiang Yuan, although he also felt that Jiang Yuan was spraying fire a bit too anxiously.

Jiang Yuan searched for videos for about 20 minutes.

Lin Qingshan simply pulled Liu Jinghui to discuss.

Including Old Qin and Huang Qiangmin and others, they were all people who had experienced big storms and waves. Since they couldn't control Jiang Yuan, they followed him first.

Old Qin talked about the internal investigation situation on his side, and Lin Qingshan also briefly said several investigation conclusions of the past two days. Here, the most important thing is the information provided by the prisoners.

Someone died in prison, and the prison police were still very nervous. For prisoners, it was no less than a carnival.

It's not that they are happy that someone died, but that everyone is excited and looking forward to possible merit.

In two days, both Old Qin and Lin Qingshan collected a large amount of testimony and made a large amount of statements.

Whether it was the roommates in Zhang Jifeng's cell or the prisoners who only met and talked occasionally, they all wished they could turn into Zhang Jifeng's close friends, describing Zhang Jifeng's various situations vividly, inevitably including speculation and fabrication.

The Penalty Execution Section in the prison is responsible for affairs such as commutation, parole, and temporary execution outside prison (medical parole). There are many heavy criminals in Changyang Prison. If they are lucky, a merit might mean sitting in prison for several months or even a year less.

"Zhang Jifeng didn't eat anything."

Jiang Yuan finished watching the video quickly. At this time, he gave a conclusion, immediately interrupted the discussion of Liu Jinghui and others, and quickly sparked a new discussion:

"Didn't eat anything? Then not poisoned?"

"There are also many toxic gases."

"Where is there such a thing in prison."

"Liquefied gas is also poisonous."

"Obviously not this kind of thing."

Liu Jinghui was a bit more serious at this time: "Personnel who have been in contact with Zhang Jifeng still need to be asked properly, especially the few prisoners who first contacted Zhang Jifeng, as well as the police officers who arrived first, all need to make a statement again."

"What are you worried about?" Old Qin had to stand out and ask.

"The screen with obstruction is only available at this time. Anything can happen. Maybe someone hit Zhang Jifeng's heart, causing him to have a heart attack is also possible." Liu Jinghui frowned when he said this, and asked: "What is the cause of Zhang Jifeng's death? Autopsy?"

"It should have been autopsied yesterday. Now, Jiang Director does the autopsy?" The prosecutor looked at Jiang Yuan. Compared with other forensic pathologists in the same system, he obviously trusted Jiang Yuan more.

Jiang Yuan nodded: "I will do the autopsy now, Liu Chu will continue to cooperate with you." ===== CHAPTER 1308 =====