"I remember the incident that day particularly clearly. Ten years have passed, but it seems to have happened yesterday." Dad An recalled the police situation that day, with a serious face and a low tone.

"When we arrived, the firefighters had already put out the fire, and the house was filled with pungent and strange smells, which were disgusting."

"The first floor is the old man's bedroom, and my mother slept on the second floor with her two children. The fire started on the first floor, and it happened in the middle of the night, and the old man was still sleeping. When we arrived, according to the on-site reasoning, the two old men were lying on the bed, first choking by the smoke, and then burning to death."

"The situation on the second floor is even more tragic. The windows upstairs are equipped with solid wood window poles, and people cannot jump out and are trapped by the fire. The mother hugged the two children, protected them in her arms, hid on the balcony, and did not escape the fate of being swallowed by the fire."

Yang Fei was thrilled and asked, "Regardingly speaking, there is always a process from the occurrence of the fire to the increase of the size. The old man was on the first floor and was slow to avoid it. It was okay if the flames rushed to the second floor so quickly? Does the people on the second floor even have no chance to escape to the top floor?"

An’s father said: “The top floor of the old residential building is not a bungalow, but a tiled house. We asked the residents nearby that when they went out to see, the building was full of fire. Neighbors were busy isolating their own houses and had no time to save the fire in their houses. In fact, such a big fire would be a drop in the bucket unless a professional firefighter would not work.”

Yang Fei said: "What is the cause of the fire? Have you found out clearly?"

"Check it out." An's father said, "a fire accident caused by aging of circuits."

Yang Fei said: "It's incredible. Normally, casualties can definitely be avoided in such a fire accident."

Dad An said, "We also thought it was too strange at that time. Why were all the family burned? The forensic doctor conducted an autopsy and determined that all five of them died in fires, and ruled out the cause of homicide. In fact, the number of fire casualties is actually very large. Thousands of people die in fires in our country every year, and more than 70,000 people die in fires in the world every year."

Yang Fei was silent.

Dad An said, "When facing a fire, people are most likely to panic, wake up from their sleep, and they are even more indifferent. Faced with disasters, we are not as strong as we imagine. Therefore, the usual fire escape exercises seem useless, but they are very necessary."

Yang Fei asked: "There is no evidence that the fire was man-made?"

An’s father said: “Using the criminal investigation technology level at that time, we could only make the conclusion that circuits were aging and fired. Fire laws show that it is impossible for combustible materials to catch fire and burn all the objects at the same time. Fire always burns from one point to another, thus forming the spreading direction and burning traces of the fire. The starting point of this spreading direction is the fire point.”

Yang Fei nodded and agreed.

He grew up in a police family, and I have heard a lot of this basic principle of judging the fire point.

Because the order and time of fire burning are different, the difference in severity and severity will be formed after combustion, as well as the difference between the heated surface and the non-heated surface, which not only reflects the order of fire spreading, but also shows the directionality of fire propagation.

Therefore, the order of ignition and the direction of the heated surface are the most typical traces of fire spreading. In fire site inspection, it is an important basis for analyzing and determining the fire point.

Dad An said that the fire point determined at that time was near the power supply.

Yang Fei asked, "Who called the police?"

An’s father said: “It’s the male owner of this family. He told us that he suspected that it was a fire that someone deliberately set. But after our investigation, we found no suspicious traces. We also investigated the male owner, but he had evidence of being absent. He escaped this disaster due to acute appendectomy that day. Both the doctor and the nurse could prove that he had not left the hospital within 48 hours.”

Yang Fei sighed and thought to himself that Lao Yan is really lucky. An acute appendicitis saved his life!

Ten years have passed in the fire, but Lao Yan’s heart has never been able to overcome it.

Yang Fei and An’s father talked about going home very late.

An Ran sent him out and asked, "Why are you paying attention to the fire that came ten years ago?"

Yang Fei told the story of Lao Yan.

An Ran said: "He has no direct evidence, otherwise he would have complained long ago."

Yang Fei said: "Yes, a fire burned all the evidence!"

An Ran said: "The biggest doubt in this case is that the competitors have Lao Yan's research results."

Yang Fei said: "Although his competitors also have his research results, it cannot be said that the other party stole it from his factory. After all, everything in the factory was destroyed by a fire. The competitor can say that this is the result of his own development. Since the opponent wants to do bad things, he will definitely leave a way out in advance."

An Ran said: "Yes, research results are the most difficult thing to judge."

Yang Fei said: "Although I know that this is the biggest doubt, I can't find the flaw!"

An Ran said: "Do you want to investigate this case?"

Yang Fei shook his head: "If you don't understand, unless the party involved is willing to plead guilty."

An Ran said: "Don't think too much, go back and rest early. By the way, I heard that you and Su Tong broke up?"

Yang Fei coughed lightly and said with a smile: "It's just a quarrel. When two people are together, they often have a quarrel. It's not that enemies don't get together!"

An Ran said: "Is that so? When I was in Taohua Village, Su Tong's mother said that you have broken up! If the two really can't get along, let go as soon as possible. It will be a good thing for you and her. Isn't it?"

Yang Fei felt her hot gaze and couldn't help but turn his face and say, "Thank you for your concern. I'm back."

An Ran held his hand and said, "Yang Fei, let's try to date, okay?"

Yang Fei's heart suddenly moved. How much courage does it take to make a woman say such words?

He was looking for wording, how should he say so that he would not hurt her heart and this precious friendship between the two?

"It's very dangerous to be my girlfriend." Yang Fei smiled relaxedly, "Do you know why Su Tong left me? Because when she was with me, she encountered several kidnappings. The struggle in the mall was too dangerous. The two fires that Lao Yan encountered were proof! You should find a partner with a stable job, which is better."

"I'm not afraid." An Ran held his hand, "Because I'm a policeman, I can not only protect myself, but also protect you."

Yang Fei pointed to her house: "You are not afraid, I am afraid. I don't want to see this house one day, because of me, there was a big fire for no reason. I don't want to see that you will become oil residue because of me..."

"Excuse! The business war is not as terrifying as you said. Lao Yan only encountered individual events. If you want to say this, which industry is not dangerous? We are the most dangerous ones! Don't make excuses. For you, don't say it burns into oil residue, even if it turns into ashes, I am willing!"

“…”

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Set a small goal first, such as remembering in 1 second: Shukeju
Chapter completed!