From Lao Chen's account, Xu Tian learned that the reason for the fire in the small hotel was that the wind pressure of the fire was equal to or less than the pressure of the air inlet, which caused the fire to spread quickly and upwards indoors, but the fire point was beyond Xu Tian's expectations, and it turned out to be a fire caused from the outside.

"What does this mean? Someone set a fire outside a small hotel? Xu Tian said suspiciously.

"From the police investigation report, it seems that this is the case." Lao Chen said.

"I don't see any combustible substances on the outside of the inn, has someone brought them here?" Xu Tian said.

"No, the police investigation report said that a fire broke out outside a guest room, and the specific cause of the fire is unknown, but the police and the fire brigade jointly investigated the scene of the crime, and finally although the fire was defined to be outside the small hotel, the cause of the fire spread was still in the guest room." Lao Chen said.

"In other words, someone cooperated with the arson in the guest room, right?" Xu Tian said.

"At present, there is no evidence in this regard, I also investigated the opening records of the small hotel at the police station, fortunately, the monitoring equipment of the small hotel is connected to the police, and it can be concluded from all kinds of evidence that no one has occupied the burning room for a few days, and no one has booked it." Lao Chen said.

"The cause of the fire is an unsolvable mystery." Xu Tian said.

"Things are not as pessimistic as you think, we still have an entry point, do you know who was captured by the surveillance video at the door of the small hotel?" Lao Chen said.

"Fang Lu, I already know." Xu Tian said.

"You got it?" Lao Chen was very surprised by this.

"I'll explain this to you later, let's discuss this Fang Lu first! There is also a fire in the hospital, Mr. Jin should have notified you, right? Xu Tian said.

"I already know, you should have an inference about the doll, right?" Lao Chen said.

"Judging from the current situation, the doll seems to be an early warning in the fire, and the doll in the small hotel has been known to be placed outside by Fang Lu, but Dr. Lin said that he saw the doll around the corner on the second floor, and in the end, the firefighters can't remember where they found the doll." Xu Tian said.

"So what? What do you want to say? Lao Chen asked.

"I think there may be more than one doll in the small hotel, we have all seen it, the location of the entrance of the small hotel belongs to the hardest hit area of the fire, from the testimony of the salesman, it can be judged that no one should be able to take the doll at the door of the small hotel at that time, I think the doll that Fang Lu took is likely to have been turned to ashes, and the doll that the firefighters searched and rescued is likely to be the same as the doll that Dr. Lin saw, this doll I think should have been put in from inside the small hotel." Xu Tian said.

"What you said makes a lot of sense, I've seen the photos of the inside of the fire at the police station, the fire has almost spread to the seventh floor, that is to say, the first floor to the seventh floor has almost been burned into an empty shell by the fire, the doll is likely to be found on the eighth or ninth floor where the fire is slightly smaller, and the probability of the eighth floor is relatively large, because only part of the carpets and murals in the corridor on the ninth floor have been burned, relatively speaking, the fire on the ninth floor is not serious at all." Lao Chen said.

"So you suspect that those people on the rooftop at the time took the doll to the eighth floor?" Xu Tian asked.

"It's just a possibility, and it can't be completely inferred, because no one has seen anyone take the doll up." Lao Chen said.

"I still have some questions about dolls. The first is that you were skeptical about the appearance of the doll just now, and I also think that the doll is like a living warning, but rather than saying this, it is better to say that the doll is a prop used by the murderer to provoke us after the fire, and the murderer should be revealing a message to us, as long as the murderer set the fire with his hands and feet, there will definitely be a doll. Xu Tian said.

"So far, that's true." Lao Chen said.

"The second question is that there were only two dolls in the three fires, and no one died in the fire in the small hotel and the hospital, but the fire in the noodle restaurant early this morning caused the death of two staff members, and no dolls were found in the fire in the noodle restaurant, I think these three fires should be the same as the fires we experienced in Dong'an City, and it was not the same prisoner who set the fire." Xu Tian said.

"This can only be used as an inference for the time being, and it can only be conclusive when we get evidence." Lao Chen said.

"Then let me have a third question! That's what matters most to me. Xu Tian said solemnly. The doll we found at the inn was a broken doll that had been burned by the fire, and in addition to the clothes and legs, the face of the doll found at the inn was also burned, which I think is a very important clue. ”

"You think someone deliberately burned the doll's face, right?" Lao Chen questioned this.

"That's right, because the doll's face was burned very strangely, the doll's hair and neck were not burned, but only the face was burned, this kind of burning marks are definitely not naturally formed, someone must have deliberately burned the doll's face." Xu Tian said.

"If someone does this, then there must be some trace of hiding, and there should be something very important on the doll's face that needs to be destroyed." Lao Chen said.

If my inference is true, then it will lead to the question, why did the person who burned the doll's face burn the doll's face in the first place? Wouldn't it be better if you threw the doll whole into the fire? All traces will be destroyed. Xu Tian said.

"I see, the man has to keep the doll, but not the doll's face." Lao Chen suddenly came to his senses.

"This is an important clue, compared to the hospital fire, the doll I found on the hospital stairs is intact, and I feel that the person who put the doll on the hospital stairs deliberately put the doll on the stairs, and the purpose of that person is very obvious, that person wants to return the notebook to me through the doll." Xu Tian said.

"And what about the third fire? What are your insights? Lao Chen asked.

"Regarding the third fire, the arsonist's intention should be otherwise, but the arsonist is not the same as the arsonist of the first two fires, and the arsonist of the noodle restaurant did not hesitate to harm the innocent to achieve his goal, and the difference between the two is here." Xu Tian said.

"It reminds me of the fire that happened on the upper floor of Hailan's house, and only that fire in Dong'an City is more risky." Lao Chen said.

"Highland...... It just so happened that the fire in the noodle restaurant was also related to Hailan. Xu Tian analyzed.

……

At this time, in the car at the entrance of the hospital, Hailan and Kang Yuliang couldn't sleep, and the two kept chatting.

"It turns out that you live upstairs in my house, why didn't I know all along?" Hyland said.

"It's just that you don't know how to observe, the fire in your house, the fire point is actually in my house." Kang Yuliang said.