It’s just that we didn’t catch him last time, but this time we caught him in the act, so he definitely won’t be able to deny it.
This is a common habit among most people, but saying it out loud at this moment would undoubtedly be a slap in Tang Ze's face.
"The fire set by Yamamura Ying this time was unexpected, but also within reason."
Facing Samejima Ryuhei's words, Tang Ze did not show any ripples. Instead, he smiled and said, "But we can't just assume that the other party was the one who caused the fire last time.
Our investigations are based on evidence and we will not accuse another person of other crimes just because of his evil deeds.
It just so happens that our discovery this time is also related to the last case. Mr. Samejima, how about we finish watching the experiment first?"
"Okay." Samejima Ryuhei had no choice but to nod when he heard that.
"Let's get started without further ado." Tang Ze smiled and walked towards the laboratory, followed by everyone.
After arriving at the laboratory, Tang Ze asked everyone to stand at the door, while he and Saito Hiroshi started working at the test bench.
"Actually, I called everyone here this time to demonstrate a simple chemistry experiment, which is also the real cause of the fire."
Tang Ze said this and picked up a round container with a white granular substance in his right hand wearing a white glove. "This is fertilizer."
"This is a common enema on the market."
Saito Hiroshi picked up an egg-shaped pink plastic bottle and opened the knob of the long tube on it. "Now we will pour these two things into ordinary gelatin capsules."
The so-called gelatin capsule is a transparent medicinal capsule, which is generally composed of two capsule shells: a cap and a body.
This thing is not only used for medicine, but can also be used in some chemical experiments. For example, it is now used to hold liquid enemas and solid fertilizers.
After the two put the things into the capsule, they taped it together.
"If that's the case, nothing will happen." Tang Ze showed everyone the two capsules he placed in the container.
"Next, we mix the two together."
Saito Hiroshi took out a long needle and pierced the two gelatin capsules that were close to each other, and placed them on the wooden chopping board in front of him.
The capsule containing solid fertilizer naturally had no reaction after being punctured, but the capsule containing enema began to flow out because the sealed capsule was punctured.
Soon, the enema flowed out, and some began to enter the capsule containing fertilizer through the hole pierced by Saito Hiroshi.
When the enema and fertilizer were mixed together, the inside of the transparent capsule immediately began to turn black, and in just a moment the entire transparent capsule was dyed black.
Then a puff of white smoke emerged from the capsule and slowly rose.
Everyone stared at the scene in front of them, refusing to look away.
People like Sato Miwako and Takagi, who didn't understand the chemical reaction, looked at the changes on the tray with uncontrollable surprise on their faces.
As the smoke filled the air, a little fire began to flicker in the black capsule, and it became bigger and bigger with rapid flickering.
"Bear!!"
The next moment, a huge flame suddenly erupted from the small capsule, and the flame was even higher than Tang Ze.
The huge flame, like a fire snake, burned fiercely and maintained its fierce flame without any sign of weakening.
It is hard to imagine that a fertilizer slightly larger than a soybean was just contaminated with some enema, and the chemical reaction between the two directly produced such a strong firepower.
Everyone watched the flames continue to burn, and finally slowly became smaller before they came to their senses.
There was originally a layer of paint and a thin wooden board on the wooden chopping board, but the fierce fire even burned through the wooden board until it burned through the solid wood underneath.
This kind of firepower is the reaction produced by a fertilizer particle the size of a soybean combined with an enema.
If this gelatin capsule is filled to capacity, combined with a little enema as it is now, it can serve as a stealthy yet powerful fire-starting device!
Not only that, such a small fire-starting device can easily be "destroyed" by the huge flames. After all, there is not much combustible material in these two gelatin capsules.
This is just an experiment now, and the capsules are already burned out even with a relatively small amount, not to mention increasing the dosage.
"Mr. Samejima, look at the burn marks on the wooden board. Don't they look a lot like the ones at the fire scene?"
But in response to Tang Ze's words, Samejima Ryuhei just walked forward and looked, but did not say anything.
Seeing this, Tang Ze did not continue to ask questions. Instead, he pointed at the tray and looked at Gao Mu and the other man who looked at him with a look of inquiring understanding, and explained: "Enema and fertilizer are both harmless drugs.
However, the enema contains 50% glycerin, and the fertilizer also contains some acidic substances.
That acid reacts with glycerol to produce nitroglycerin."
"These two things are so easy to buy?" Sato Miwako said in surprise.
"Although it is simple, it is not easy to make a fire-starting device when you can imagine that the combination of these two can produce a chemical reaction." Tang Ze explained with a smile.
"But the criminal may not have used this method." Samejima Ryuhei, who had been silent on the side, stared at the table and suddenly spoke.
"In this regard, we used an exhaustive method to combine a large number of enemas and fertilizers on the market and compared them with the combustion residues at the crime scene."
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