Detective Conan: Knifeman? I'm a good citizen of Beihua

The forensic officer took the brick and examined it carefully. Finally, he turned to look at Megure Jusan and said, "It should be this brick. There are cracks on it."

Although the brick is hard, it was used to attack the person's face. The cartilage tissue on the face absorbed most of the impact force, causing it to dent and deform. The brick was also subjected to uneven force, causing some cracks to form.

So in fact, the brick had already cracked, but in order to cover up his tracks, the murderer used cement to force the bricks together, and then placed the brick between several bricks.

In this way, it is generally difficult to find its flaws.

"And there's plastic wrap here that the murderer used." Takagi handed the blood- and cement-stained plastic wrap to the forensic officer. "The murderer must have wrapped the bricks in plastic wrap beforehand. That way, even if the bricks shattered, they wouldn't be scattered everywhere."

This makes the site easier to maintain, as there is no need to go out of your way to pick up broken bricks.

The forensic officer understood: "No wonder we didn't find any brick debris on the victim's face. It turns out the murderer wrapped the brick in something before hitting him with it..."

Megure Jusan lowered his head in thought for a moment, then looked at the "sleeping" Maori Kogoro: "But how did the murderer manage to kill the victim without getting any blood on his hands?"

They had just checked and found that no one had blood on them.

"Mouri Kogoro": "This is naturally because the murderer was not at the scene."

Everyone: "Huh?"

What do you mean... not there?

Megure Jusan was surprised: "If the murderer was not at the scene, how did he kill the deceased?"

"Mouri Kogoro" asked Takagi Wataru: "In addition to the bricks and plastic wrap, did Officer Takagi find anything else?"

Takagi Shigeru held up an evidence bag and said, "As expected of Mr. Mori, we also found a piece of string."

Sato Miwako was stunned for a moment, her eyes fell on the building in front of her, and she murmured softly: "Could it be..."

Could it be that the murderer did that...

"Mouri Kogoro": "The murderer first tied one end of the rope to the outside of the third floor roof in advance, while he himself was hiding on the edge of the building on the fourth floor, which was directly above the murderer."

"When the deceased came up, the murderer used some method to attract the deceased to the predetermined death location. Finally, the murderer only needed to throw the brick out with all his strength."

"As the brick moved outward and began to fall, the rope was stretched, exerting an inward pull on the brick, causing it to change direction and strike the deceased on the third floor. You can think of it as a pendulum-like motion, except this 'pendulum' is formed by both the person throwing the brick and gravity."

"The brick now possesses a significant amount of force. Even a powerless person could have smashed a large hole in the victim's face, potentially killing him. And because the murderer wasn't at the scene, there was no need to worry about bloodstains. All they had to do was retrieve the murder weapon and tools, and they could have gotten away without a hitch."

Everyone listened carefully to Kogoro Mori's analysis and nodded repeatedly.

"The murderer went to such great lengths to arrange this. Can we boldly guess that the murderer is a person with very little power?"

Megure Jusan's gaze fell on the suspects behind him.

The focus fell on the only two women.

That is Yoko Nakata and the security chief.

Compared with the other men, these two women are obviously more suspicious.

The security director took a step back, his expression panicked and bewildered, his voice trembling. "No, it wasn't me. It really wasn't me. I can't even think of that method."

Nakata Yoko remained remarkably calm, her voice steady as she spoke, "The murderer wasn't just relying on force to do this, was he? Perhaps he simply wanted to avoid the blood splattering on himself. After all, bloodstains are the most difficult to conceal and remove. This method can be performed by anyone, regardless of gender or strength. It's rather arbitrary for the officer to suspect us like this."

Megure Jusan narrowed his eyes: "What you said does make some sense."

His eyes moved among several suspects, and finally looked at Maori Kogoro, and said helplessly: "Who is the murderer? Maori brother, don't keep us in suspense!"

"The murderer is naturally——"

Maori Kogoro lowered his head and raised his voice slightly:

"Ms. Nakata Yoko—"

"What? It's actually—"

Everyone turned their heads and looked at Yoko Nakata with burning eyes.

Yoko Nakata's expression was calm, without any nervousness or panic. She just pursed her lips slightly, stared at Kogoro Mouri, and clenched her fists slightly.

"Everyone around here is Mr. Ichima."

"Uh-huh?"

Everyone shifted their gaze away from Nakata Yoko in surprise and looked at the thin man next to Nakata Yoko.

Du Shangyizhen is the engineering supervisor, who is mainly responsible for construction technology and quality control, and is considered a technical staff on the construction site.

In fact, looking at his identity at this moment, it really fits the method of this case——

As the engineering supervisor on the construction site, he was familiar with these operations and tools, and had the time and ability to test them in advance. Especially for a killing method like this that required aiming and only had one chance, Mr. Du Shang Yizhen must have practiced it privately countless times.

Moreover, the act of simply building the tools into the wall is something that no one else can do. Only Du Shangyizhen, a technician who is familiar with the construction site procedures, can do it.

After hearing the incisive analysis from "Mouri Kogoro", Tojo Ichima didn't say anything, but his face turned much paler.

Yoko Nakata looked at Ichima Tojo with a complicated look and took a step back silently.

"I guess Mr. Tojo Ichijin must have turned back halfway! Everyone was scattered at the time, and no one noticed you, so you immediately turned back and found an excuse to trick the deceased up to the third floor."

"The deceased wouldn't have followed you up to the third floor for no reason, so I assume you must have used an excuse like 'there are other safety hazards at the construction site,' right?"

"The building opposite hadn't applied the film in time, causing severe light pollution at the construction site in the afternoon. You should have mentioned this to the deceased before, but he didn't take it seriously. This time, Mr. Hori Yasumasa was determined to investigate the constant accidents at the construction site. So you knew that if you said this, the deceased would definitely take your words very seriously and might even be willing to follow you up to investigate the situation alone."

"The next step is even simpler. You tell the deceased that the light hasn't refracted yet, but you can demonstrate the severity of the light refraction in the opposite direction. Then, you get the deceased to cooperate with you and stand in the corresponding position. Then, you go up to the fourth floor, aim the brick in the direction you've tested in advance, and throw it with force—"

So in the end, the defenseless Chuan Jun Hangping was hit hard in the face by the flying brick, and fell down the stairs and died on the spot.