civil forensic

Chapter 1321 Surveillance Analysis

Chapter 1321 Surveillance Analysis

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

Poisoning, inmates poisoning, or poisoning in the cafeteria—all the dangerous elements are present.

Prosecutor Lin Qingshan didn't care about anything else; he came straight to the point of finding problems and faults. As a seasoned prosecutor who had handled many cases, Lin Qingshan asked with experience, "Was the food from the canteen that day sealed off?"

Prison Warden Qin immediately turned to look at the head of the prison's internal investigation department.

The prison investigation department is responsible for handling cases within the prison. With more than 4000 criminals detained in one prison, no matter how strict the system is, they can always find a way to commit crimes.

Before being reported to higher authorities, the on-site handling within the prison was also carried out by the prison's internal investigation department.

Section Chief Wei Jinchuan was forced to step forward, his brows furrowed as he said, "When we arrived, Zhang Jifeng had already been taken to the hospital. When we arrived at the scene, there was no food left."

"What happened to the food? What about the hygiene department?" Warden Qin shouted, and then people squeezed in from behind.

In prison, the sanitation and hygiene department is responsible for tasks involving eating, drinking, and basic necessities, such as the canteen. The sanitation and hygiene department at Changyang Prison only has five people: one department head, two deputy department heads, one chief clerk, and others. With so few people, it's impossible to manage every detail of the canteen; at most, they can handle procurement and other administrative tasks.

Therefore, the head of the hygiene and sanitation department, who was summoned, also looked helpless and said, "We were in the office building at the time and didn't know exactly what happened. We just assumed that Zhang Jifeng had a medical episode, like a heart attack or something. It was lunchtime, and everyone who was supposed to be working had come to eat, so they should have eaten all the food in the canteen. The problem is that no one reported having a stomachache or anything like that; everyone else was fine!"

"The ambulance has arrived, and you're still not taking it seriously!" Old Qin roared in anger.

"Nobody told us anything. Besides, the cafeteria was still open at the time, so nobody thought about food poisoning." The head of the hygiene department answered cautiously. Whether it was true or not, it was hard to say what others were thinking.

"Let's check the surveillance footage and see how the food was handled afterwards." Liu Jinghui often visited military bases and knew that now was not the time to watch the show. If the case hadn't even been fully investigated yet, and the prison was already frantically shifting blame, their follow-up work would be difficult.

The police officers, sitting in front of the nine-grid screen, were under immense pressure as they adjusted the time and pulled up more videos from before and after the incident.

This step was much more complicated, unlike the previous videos which could be prepared in advance, leaving him somewhat flustered.

Jiang Yuan stepped forward and said, "Shall I do it?"

The police officer first looked up at the warden, and after receiving his tacit approval, asked Jiang Yuan, "Shall I explain to you how to use this system?"

"Sure. I'll give it a try first." Jiang Yuan actually knew how to use it. Although there are many types of surveillance systems, and most of them are non-standard products, they are actually quite similar. Professional image investigation police officers might find it difficult to adapt to a new system, but Jiang Yuan's LV3 security monitoring technology covers the entire range of technologies.

Moreover, Changyang Prison uses Hikvision, which was selected through centralized bidding. Even if there are any special requirements, the basics of this kind of monitoring system are still within the scope of the original design.

Therefore, while Jiang Yuan said he would give it a try, he tapped on the keyboard and fiddled with the control panel. In front of the other party, he first checked the system logs, then checked the device status, and then labeled the corresponding videos according to "time classification", "channel classification" and "event type classification".

The police officer in charge of operating the monitoring system at the scene only knew some basic operations. If he still had doubts about Jiang Yuan's quick way of searching and reading logs, Jiang Yuan's skillful video classification alone made him realize that things were not simple.

He couldn't help but look with pleading eyes at the third-party maintenance personnel on the periphery of the crowd.

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

"Count!"

"one two Three……"

Jiang Yuan played the surveillance audio aloud and turned it up.

Everyone's attention was immediately drawn to it.

What Jiang Yuan released was the scene inside the cafeteria when the incident occurred.

The prison canteen is built and decorated the same way as a school canteen. Changyang Prison has about 50 tables, all four-seater, made of steel and with the legs welded to the floor. The floor is terrazzo, neither particularly attractive nor unattractive, just adequate.

On the monitor screen, a group of inmates had just finished eating and were counting off before going to wash the dishes.

Meanwhile, another group of inmates lined up to enter. Upon arrival, they did not immediately sit down. Instead, they first lined up and counted off, then went to their designated positions, watched as people filled their bowls with food, and finally, at a command, they all sat down. Then... they began to sing, and then counted off again.

Finally, it was time to wolf down the food. The whole time was less than 5 minutes. They ate as much as they could, and if they couldn't finish, they had to get up and leave because inmates from another cell block were already waiting with bowls next to them.

Jiang Yuan watched the video from several angles and finally confirmed: "The food made in the cafeteria kitchen has indeed been eaten."

Prison Warden Qin breathed a sigh of relief: "This means that even if there was poison, it wasn't put in the food in the kitchen."

“That’s not necessarily true. Maybe the dosage was too small after being divided equally, or maybe the toxin was triggered by certain conditions, such as oral ulcers.” Jiang Yuan first rejected Lao Qin’s idea, then 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, dazzling everyone.

Even prosecutor Lin Qingshan, who often worked with the police, had never seen anything like this before. Looking around, he felt that Liu Jinghui was more reliable, so he asked, "I thought we were having a case discussion meeting to determine the direction of the investigation."

"Wouldn't it be faster if we could directly determine the direction of the investigation?" Liu Jinghui naturally supported Jiang Yuan, although he also felt that Jiang Yuan was being a bit too hasty in his criticism.

Jiang Yuan spent about 20 minutes searching through the videos.

Lin Qingshan simply pulled Liu Jinghui aside to discuss it.

People like Lao Qin and Huang Qiangmin have all been through a lot. Since they can't control Jiang Yuan, they'll just go along with it for now.

Old Qin explained the situation of his internal investigation, and Lin Qingshan also briefly mentioned several investigation conclusions from the past two days. The most important of these was the information provided by the inmates.

When someone dies in prison, the prison police are still very nervous, but for the inmates, it's no less than a celebration.

It wasn't the death that made people happy, but rather the excitement and anticipation everyone felt for the potential for meritorious service.

Over two days, both Lao Qin and Lin Qingshan collected a large amount of testimony and took extensive notes.

Whether it was Zhang Jifeng's cellmates or fellow inmates who only met and talked occasionally, they all wished they could become Zhang Jifeng's close friends and vividly describe Zhang Jifeng's situation, inevitably including speculation and fabrication.

The penal execution department in the prison is responsible for matters such as sentence reduction, parole, and temporary release from prison (medical parole). Changyang Prison has many serious offenders. If you are lucky enough, a meritorious service may save you several months or even a year of your prison sentence.

"Zhang Jifeng did not eat anything."

Jiang Yuan quickly watched the video and gave his conclusion, immediately interrupting Liu Jinghui and the others' discussion and quickly sparking a new debate:

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

"There are also quite a few toxic gases."

"Where would you find something like that in a prison?"

"Liquefied petroleum gas is toxic."

"It's clearly not that kind of thing."

Liu Jinghui became a little serious at this point and said, "We still need to question those who have been in contact with Zhang Jifeng, especially the inmates who first came into contact with Zhang Jifeng, as well as the police officers who arrived first. We need to take a new statement from them."

"What are you worried about?" Old Qin had no choice but to step forward and ask.

"The obscured footage only appeared at this point. Anything is possible; perhaps someone bumped into Zhang Jifeng's heart, causing a heart attack." Liu Jinghui frowned at this point and asked, "What was the cause of Zhang Jifeng's death? Was an autopsy performed?"

"The autopsy was supposed to be performed yesterday, but now, Director Jiang will perform it?" The prosecutor looked at Jiang Yuan, clearly trusting him more than the other forensic doctors in the system.

Jiang Yuan nodded: "I'll go do the autopsy now. Director Liu, please continue to cooperate with you."