The famous criminal in the world of Conan

Chapter 219 The bullet spontaneously combusts!

"The murderer did make a small device, but it was not a device for ejecting bullets, but a device for fixing bullets."

Fixed device?

Everyone was stunned. If the bullet was just fixed, then how did it get shot out?

At this time, I only heard Bai Masong speaking lightly,

"Has everyone forgotten that guns or other devices actually only serve to ignite the bullet?"

"There is gunpowder at the bottom of the bullet, so as long as it is ignited, it will naturally fly out."

After listening to Bai Masong's words, everyone now knew what it meant.

But......

"But,"

Officer Megure asked again hurriedly,

"But how can this bullet be ignited?"

"You know, this room has been completely locked by Shigehiko Tsuchiguchi himself, turning it into a closed space."

"The murderer certainly couldn't get in. There wasn't any launching or ignition device set up."

"So, how did this bullet ignite?"

In response to Inspector Megure's questioning, Bai Masong patiently explained,

"Is it possible that this bullet could spontaneously combust?"

Spontaneous combustion?

"Kai, are you kidding me?"

Inspector Megure looked confused.

"How is it possible that a bullet could spontaneously combust?"

"hehe,"

Bai Masong smiled gently.

“With white phosphorus, that can be done.”

white phosphorus?!

If Bai Mashong hadn't said it, no one would have expected it. However, when Bai Mashong said this, everyone was shocked.

Yes, white phosphorus can burn even when the temperature is not high.

But......

Inspector Megure was confused again.

"Isn't the ignition point of white phosphorus 40 degrees Celsius?"

Facing Inspector Megure, whose voice changed and became a problem baby as soon as he arrived at the crime scene, Hakuba Matsu was still very patient.

"Although the ignition point of white phosphorus is 40 degrees Celsius."

"However, it does not necessarily require the external ambient temperature to reach 40 degrees Celsius."

"In fact, when white phosphorus comes into contact with air, it will slowly undergo oxidation."

"And white phosphorus also releases heat during the oxidation reaction."

"The heat released will raise the temperature inside the white phosphorus."

"So, although the temperature outside may only be around 20 degrees, the temperature inside the white phosphorus has actually reached the ignition point."

That's it!

Inspector Megure suddenly realized.

Not only Inspector Megure, but all the police officers around him, except Shiratori Jinsaburo, had an expression of sudden enlightenment.

There is no way, they basically just studied these cultural courses in a perfunctory manner.

It is already very good that they know that white phosphorus spontaneously ignites at temperatures of 30 to 40 degrees. In fact, it would be a bit difficult for them to know more.

Bai Masong continued,

"So, as long as we understand this point, this so-called closed room murder trick will be easy to see through."

"The murderer first took advantage of Shigehiko Tsuchiguchi's psychology, causing him to close the doors and windows on his own initiative in order to cover up the evidence of his crime."

"Then, we can use the fact that Shigehiko Tsuchiguchi will be eager to open the suitcase and quickly check the information to set a trap."

"As long as Shigehiko Tsuchiguchi sits on the sofa, his fate is sealed."

"He will definitely be killed by the bullets that have been arranged in advance!"

"Etc., etc......"

Upon hearing this, Inspector Megure asked again,

"Brother Hakuba, how did the murderer determine Councillor Tsuchiguchi Shigehiko's sitting posture and position?"

Well...

“This question is actually very simple.”

Bai Masong explained,

"In fact, this is simply taking advantage of human psychology."

"Or rather, the murderer has completely grasped Tunkou Shigehiko's psychology at this point."

"He knew that Shigehiko Tsuchiguchi would close the doors and windows to prevent others from seeing his weakness."

"As long as he knew these two points, the murderer could use the placement of the suitcase to force Shigehiko Tsuchiguchi to sit down."

Specify where Shigehiko Tsuchiguchi sits?

Inspector Megure was stunned again.

This is too mysterious!

“Not mysterious at all!”

Bai Masong pointed at the sofa where Tunkou Shigehiko died and said to everyone,

"Look carefully, what are the characteristics of the sofa that Tsunoguchi Shigehiko is sitting on now?"

Features?

Everyone looked towards the place where Shigehiko Tsuguchi died.

After looking carefully with a purpose, everyone understood.

There is actually more than one sofa in this room.

There are three sofas in this room, one big one that can seat three people, and two small ones that can seat one person each.

At this time, Shigehiko Tsuguchi was sitting on the sofa that could only accommodate one person.

"Understand?"

Bai Ma Song said,

"When the murderer left, he just opened the suitcase, exposed the information inside, and placed the suitcase facing the sofa where Shigehiko Tsuchiguchi was sitting."

"Once Tunkou Shigehiko comes in, he will naturally think about the evidence of his crime. It's not okay to leave the door wide open like this."

"So, his first reaction was to close the doors and windows."

"After the doors and windows were closed, he was anxious to check his handles. In addition, the suitcase had been opened, so it was too troublesome to close it and then take it away."

"So, Tsunoguchi Shigehiko will definitely sit directly on this sofa."

"After Tsunoguchi Shigehiko sits down, he must have read these materials. In this way, his posture is almost fixed."

"The murderer had contact with Shigehiko Tōguchi many times and even had leverage over him, so he must have known his height."

"In this way, all calculation factors are fixed and known."

"From these things, it's easy to figure out where the bullets are placed."

"As for the time the bullet was fired, as long as the murderer takes a few more bullets at home to do experiments, it can be easily calculated."

"Of course, this method is not something I came up with out of thin air."

Bai Masong said this and showed everyone the bullets in his hand.

"Judging from the caliber of this bullet, if it was fired from a pistol and was so close to Tsuchiguchi Shigehiko, it would definitely pass through him and hit the surrounding walls or ceiling."

"But now there is no damage around, there is only one possibility."

"That is - the murderer took some of the gunpowder out of the bullet, and the white phosphorus naturally caused the bullet to be fired without enough power."

"This is the evidence that the murderer committed the crime."