In the dim room, everyone looked at the area that Samejima Ryuhei pointed to, and then they all looked confused.

"It's completely charred. You can't see anything." Looking at the charred ground through the flashlight, Gao Mu on the side scratched his head.

"Actually, there is a difference," Samejima Ryuhei explained. "We usually judge based on the degree of carbonization."

"You're truly an expert," Sato Miwako praised. "I've also read your report. You're truly worthy of respect."

"You're too kind."

Samejima Ryuhei remained humble, immediately refocusing his attention on his work. "The fire intensified in the early stages, most likely due to the presence of lamp oil as a combustion aid."

He pointed to a large white plastic pot beside him and said, "I'm afraid the prisoner first sprinkled lamp oil and then used a lit cigarette to ignite it."

"Why can you be sure it's lamp oil?" Takagi asked humbly.

"By smell," Samejima Ryuhei said, "With more experience, you'll be able to immediately tell whether it's lamp oil, gasoline, or thinner."

"Amazing! Just like Detective Karasawa's 'super sense of smell'!" Takagi exclaimed, then laughed, "Looks like we don't have a chance to appear."

"Saito, what do you think?" Tang Ze on the side did not comment, but looked at Saito Hiroshi who was fiddling with a plastic oil bottle and asked.

"Without scientific testing, any conclusions are premature," Saito Hiroshi said calmly. "After all, everything around here is made of plastic."

"As for plastic, it's a petroleum product. I'll pay attention to that during the investigation." Samejima Ryuhei didn't get angry after being questioned, and he still looked humble.

Seeing that he was still searching the room for clues, everyone started to take action.

"The fire was truly terrifying." Takagi walked around the room, feeling completely bewildered. "It feels like all the clues have been burned."

"Prometheus stole fire from the gods and gave it to mankind. After so many years of technological advancement, even though we control fire most of the time, sometimes it will undergo changes beyond human wisdom."

Samejima Ryuhei said this while looking at Tang Ze and the other criminals beside him and said sincerely, "I have worked at fire scenes for so many years, and there are still things I don't understand.

I hope to cooperate with you this time to uncover the truth."

"You're still so modest." Gong Chang patted Samejima Ryuhei and said with a smile, "An expert like you needs to show some swagger sometimes!"

"I'm just an ordinary firefighter, I can't be called an expert." Samejima Ryuhei said modestly, "But Detective Yumio, do you have any suspicions about the arson suspect?"

"Regarding this, because of the recent spate of fires, we suspect arson."

Upon hearing this, Inspector Gong Chang said, "My men made some discoveries during their previous investigation. A murder occurred today. I plan to invite him directly to the station later."

"Then there is no time to lose. Let's go back immediately after collecting the physical evidence." Gao Mu didn't expect that there would be a clue just after the case happened, and his expression brightened up.

"Okay, my people have just found him. I will ask them to take him back now." Inspector Gong Chang nodded and took out his phone.

"We've almost finished collecting evidence here." Saito Hiroshi placed the bag of evidence debris into the box, stood up and said, "The next step is testing."

"Tell me the results."

Tang Ze looked at Saito Hiroshi and said, "I'll go meet the suspect first."

After the division of labor was completed, the group separated and moved away from the scene.

Inspector Yuminaga's men acted quickly, and by the time they returned to the Metropolitan Police Department, they had already taken the suspect to the interrogation room.

The suspect is called Yamamura Ying, 26 years old, unemployed and a vagrant.

According to the investigation, a few hours before the fire broke out last night, the suspect went to a nearby gas station to buy lamp oil.

Of course, the person was brought back, but he had no intention of admitting his guilt.

"Someone's changed."

Gongchang said something and asked the interrogating men to come out and sit opposite Yamamura Ying with Tang Ze.

"I have to say, you are really hardworking."

After taking their seats, Inspector Yumio looked at the silent Yamamura Ying and said, "If you hadn't done something like this, I'd have given you a perfect attendance award."

As he spoke, he spread out the photos his men had just collected in front of him one by one: "These are photos from the recent fire scene, this one! This one! And that one!

It’s really amazing, you were captured in all the onlookers’ cameras!”

At the fire scene, in addition to the rescue firefighters, the news media or reporters can be said to be another group of people who arrive at the fire scene first.

Of course, their job was not to go in and rescue people, but to report and record the disaster.

This job often involves filming the surrounding crowds. Some of this is just background footage, while others have good relationships with the fire department or the police, and they habitually record the crime scene.

Because many serial arsonists like to return to the scene after committing a crime to watch their "work", reporters have gradually learned about this.

They were also happy to do the favor and help take pictures of the people near the fire scene to see if they could be of any help.

If I can really help unexpectedly and get thanks from the police, then no matter whether the report satisfies the higher-ups or not, my work will not be in vain.

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