Conan started from the chat group

"Impossible. Even if the light bulb ignites the paper towel, it will take a while. Someone must find out, and it is impossible to burn the whole house with such a small fire," Guisi said.

The invisible night black demon is a bit embarrassed, such profound knowledge, it has never learned, it is a bit behind

"Then if you add gasoline," Geng Ghost said.

"Add gasoline? Heh, it's better to set it on fire and burn it clean. If it's necessary, it's so troublesome to tie it to the light bulb with a paper towel." Guisi hehe.

The two elves discussed, Situ Xiu thought about it, and thought that what Geng Gui said was very likely.

"Lemon's idea is correct. Such a method is very possible. Coke, the purpose of the gangster should be to create an alibi. If it spontaneously ignites within 10 or 20 minutes, no one will suspect that the gangster did it."

After hearing this, Gui Si was still dissatisfied: "But the speed of burning the paper towels is not so fast, if there is a mistake in the middle."

"How about tying a match? Is it fast?" Situ Xiu said after pondering for a moment.

The two elves subsided.

Matches are very flammable. If you tie a match on the surface of an incandescent bulb, the match can ignite the paper towel quickly, and if there is gasoline, the whole house will be burned clean.

After that, Situ Xiu took Katy the dog and left the burnt house without finding out. It was already very good to find out the modus operandi, no matter whether the analysis was right or not, there was at least one direction.

Even if the criminals were not at the scene, they could still commit the arson. The next step is to investigate the suspicious person. However, before that, it is necessary to confirm whether there are similar clues at the scene of the second and third fires.

After coming out, Situ Xiu told Koizumi Hongzi his analysis and planned to go to the scene of the second fire.

"Wait a minute, I think there is one person who is very suspicious, that is the middle-aged man who called us just now. I asked him what happened here, and he faltered and left in a panic. Guess where he went," Koizumi Hongzi said .

"You don't mean to tell me that he lives next door." Situ Xiu looked at a big house next to the fire house.

"That's right! He lives in the house next door," Koizumi Hongzi said with a smile.

"" Situ Xiu.

Damn, just talking nonsense.

Thinking about it carefully, Situ Xiu didn't think that the neighbors on the left and right would go to set the fire, which would be easy to be suspected. If he was a gangster, he would definitely go farther away.

However, sometimes smart people think in the opposite direction, the more impossible the more likely.

The two went to the middle-aged man's house together, and rang the doorbell at the door, intending to find out about the fire.

The door opened, and the middle-aged man looked at Hongzi Koizumi and said, "You are the lady from just now. Excuse me, what can you do?"

"Sorry to bother you, I want to ask you about the burning down of the house next door." Koizumi Hongzi smiled slightly.

"Why do you ask this?" The middle-aged man's eyes flickered slightly.

"My family lives in [-]-chome. I heard that criminals may go to [-]-chome to commit crimes and set fire to it. I am a little worried, so I want to investigate the arson case," Koizumi Hongzi lied.

"" Situ Xiu.

The middle-aged man couldn't help but change his face slightly, and said: "Then come in and sit down, and I will tell you about the arson case in detail."

"Really? That's great, but will it bother you?" Koizumi Hongzi said.

"No, I'm the only one at home." The man shook his head.

Suddenly becoming so enthusiastic, Situ Xiu was a little puzzled, but he didn't take it too seriously. With Kati Dog here, it is possible that this guy can still go to heaven.

The two entered the living room, the middle-aged man prepared some snacks and tea, and then began to talk about the fire in the house next door.

"Master, I just took a look in the room and found a bug in a small cushion, and there is a crystal ball on that cushion, it seems to be something for divination and blessing," Geng Gui, who was invisible, said.

"Master, I found a bug in the vase and pottery at the door," Guisi said.

"" Situ Xiu.

Two bugs, different locations, someone is watching the family, or the man suspects that a stranger has sneaked into the house, and intends to use the bug to eavesdrop on who broke into the house.

No, sneak into the house secretly, why don't you install a monitor to take pictures, it's useless to use a bug, and you can't see anyone.

Situ Xiu suspected that the man had been bugged. He didn't know the reason. After the man finished talking about the fire incident, he thought about it and asked, "Uncle, what do you do?"

"In my case, I opened an antique shop in Kubado-cho"

The man smiled, took out two items and handed them to Koizumi Hongzi, and said: "This is for you, this is the product brochure and key chain in my store."

"Ah! This, this is not very good, I can't ask for it." Koizumi Hongzi waved her hand and refused. How can anyone give a gift when they meet for the first time.

"This is not a valuable item, it's a gift from the store, just accept it," the man said.

"Then, okay, thank you." Koizumi Hongzi reluctantly took two items, one was a small box with a key chain hanging on it, and the other was a small notebook.

Situ Xiu glanced at the two items and asked, "Uncle, have you encountered any strange things recently?"

"Strange thing?" The man's face became strange, "Recently I have been sleepwalking, I don't know if it counts."

"Did your family members find out that you were sleepwalking?" Koizumi Hongzi said.

"No, I'm the only one at home. I woke up in the morning and saw some bad things. I tidied them up the day before. After a night, it became very messy in the morning, so I suspect that I made the mess by sleepwalking." The man sighed.

Can't go wrong!

The bugs could have been used to spy on other people, or the man.

Situ Xiu still doesn't know which one it is, but he can be sure that someone has sneaked into the man's house without permission.

The incident of the arson case was similar to what the man described, and Situ Xiu and Koizumi Hongzi left the man's house without getting more useful information.

The second fire accident happened in [-]-chome, Toriya-cho, a residential area of ​​Nakamura’s house. The whole house was burnt clean, leaving a pile of dark ruins.

Similarly, under the guidance of Katie Dog, Situ Xiu discovered the fragments of the incandescent light bulb, and was able to confirm the gangster's modus operandi, and then went to the scene of the third fire.

"Master, someone is following us. It's the man next door to the house on fire in Lishan Town," said the invisible Geng Gui.

Situ Xiu was taken aback, raised his hand to check the time, it was past noon, and it was time to eat.

"Sister Hongzi, let's have lunch first."

"OK".

The two went to a restaurant for lunch, and a middle-aged man quietly followed them tens of meters behind them.

"Are you still following?" Situ Xiu said.

"Yes, young master," Geng Gui said.

Behaving suspiciously,