[Background] From October 27th to 29th, the province's firefighting and public security criminal investigation fire investigation pull exercise and extended investigation field meeting hosted by the Yunnan Fire Rescue Corps and the Criminal Investigation Corps of the Yunnan Provincial Public Security Department was held in Mile City, Honghe Prefecture, Yunnan Province.
The reporter also took this opportunity to approach the post of fire investigator in the fire rescue team to see how they looked for clues that caused the fire in the dark smoke and burnt residue, and peeled off the cocoons to restore the truth.
[Explanation] The scene of the exercise simulated a fire in a packing box production and sales plant and a collision between two vehicles. After the fire was extinguished, the scene was sultry and humid, with choking smoke and humid moisture everywhere, which was burned by the fire. The ruined walls are crumbling, and fire investigators are conducting investigations in such a harsh environment.
[Simultaneous] Ma Yinlei, professional technical second-level commander of Mengzi Brigade, Honghe Prefecture Fire Rescue Detachment
Our fire investigators also went to the scene with the officers and fighters as soon as possible. When they came to the scene of the fire, they extinguished the fire. We first carried out environmental surveys on the periphery, and also inquired and investigated the parties concerned. After they extinguished the fire, we had to respond. Repeatedly enter the fire scene for fire investigation.
[Concurrent] Zhang Liangliang, second-level commander of Jianshui County Brigade, Honghe Prefecture Fire Rescue Detachment
Many times we cannot substitute other tools when searching for evidence, because if we use other tools, we may destroy the physical evidence, so we use our hands to throw away the broken bricks and rubble layer by layer, and then look for physical evidence.
Most of the time, when investigating fires, we have to be careful about the collapse of the roof or the wall, because after being burned by the fire, it is impacted by the water gun, which is very weak and there is a danger of collapse.
[Explanation] Fire investigation requires multi-disciplinary expertise, and the results of the investigation must stand the test.
A qualified fire investigator needs to have excellent professional qualities and a considerable degree of understanding of architecture, chemistry, materials science, mechanics, electricity, law, psychology, etc.
[Concurrent] Jin Li, Head of Fire Control Technology Division of Kunming Fire Rescue Detachment
What is bold and careful?
You have to boldly imagine various possible causes of fire, and at the same time, under this premise, you must carefully verify the reason and basis for each possibility.
In fact, the entire fire tuning work is not simple, because from the terminology of our industry, whether it is on-site inspections, peripheral surveys and visits, or the extraction and identification of relevant trace data, these tasks require a lot of time and energy. Do it.
[Explanation] A fire investigation can be as short as three to five days and can take several months. After the on-site inspection is completed, the links of investigation and inquiry, loss statistics, trace analysis, and physical and chemical inspection are still critical.
[Concurrent] Jin Li, Head of Fire Control Technology Division of Kunming Fire Rescue Detachment
In some sites, the on-site environment is more complicated, so on-site inspection will be difficult.
Some people at the scene do not cooperate or the suspect refuses to explain. When playing psychological warfare with them, this process is more difficult.
This is also based on different fire scenes and different situations.
The overall feeling is that every scene is not simple, and every scene requires twelve minutes of energy to find out the cause of each fire accident.
[Explanation] Although fire investigators do not directly save people, once they see the truth, they can warn society, deter evil, and reduce the occurrence of tragedies.
Reporter Du Xiaoxiao from Yunnan Honghe
Editor in charge: [Lu Yan]