When Maolilan singled out the girder and identified the murderer in the spotlight, she felt a full sense of accomplishment in her heart.

is different from the last murder case in the art museum, Lin Xinyi deliberately gave out the opportunity to exercise.

This time's "C-position appearance" was won by her own ability through her real contributions.

And compared with the director of the art museum, in this case, the murderer's murderous trick is even more ingenious:

The killer fired several shots in the utility room on the 4th floor beforehand, leaving bullet casings and bullet holes to camouflage the scene.

When it was time for the live broadcast in the evening, he took advantage of the 3-minute break of the program to rush to the utility room on the 9th floor, shoot from the upper floor, and kill the deceased on the 4th floor who was lured by the phone.

After that, he threw the gun from the 9th floor into the window on the 4th floor, and then returned to the live broadcast by himself.

In this way, the murderer has a perfect alibi.

In all fairness, this murderous ruse is clever enough.

Mao Lilan believes that even if her childhood sweetheart as a detective takes action in this case, it may take a lot of effort to see through the truth.

And this time, in just ten minutes after entering the scene, she was reminded by Lin Xinyi to crack the murderer's methods.

"I did it!"

"Even that reasoning freak is here... There's no way to dump me, can you? ”

Maolilan thought to herself.

Of course, she didn't know that the reasoning freak was actually standing in the crowd of onlookers right now—

Like her before, she has become the one who was left out in the cold.,Completely backdrop.。

In short, with a positive and uplifting attitude, Mao Lilan unconsciously followed the example of the great detective Kudo, and under the watchful eyes of everyone, he uncovered the murderer's methods with high spirits.

And Matsuo Takashi's tricks were indeed successfully uncovered by her.

But...

"Proof?"

Maoriran ran into unexpected trouble:

Matsuo's method was exposed in public, and he dared to resist stubbornly, obviously preparing to clean up the traces in advance.

Mobile phone call logs, gunsmoke reactions, fingerprints on guns...

These traces, which Matsuo took the initiative to mention, are also the most effective evidence that can solve this kind of shooting, and I am afraid that they have all been cleaned up.

So... What other evidence can she use to prove the murderer's guilt?

Mao Lilan pursed her lips tightly, and her expression was a little shaken:

She suddenly felt a little nostalgic for the murderers she had encountered when she was with Kudo Shinichi.

Those guys either don't know how to clean up the traces at all, or if they don't have extremely fragile psychological qualities...

As soon as the murder method is revealed by the detective, he will kneel on the ground on the spot and cry and confess.

But now, it's her turn to be a "detective", and she obviously cracks the murder trick...

Instead of surrendering, the murderer dared to provoke her.

"What to do..."

Miss Maori couldn't help but be a little confused.

The curious and expectant gazes of the onlookers, and the crazy and provocative eyes of Matsuo Takashi, all made her inevitably a little impatient.

"Miss Maori, there's nothing to worry about."

Lin Xinyi's calm and powerful voice quietly sounded in his ears:

"We're forensics, not detectives."

"Cracking the ruse is only the beginning of our work, using a scientific eye to find evidence, using strong evidence to restore the truth, is our real way of fighting."

"Hmm..."Mao Lilan was slightly stunned, and then reacted:

Indeed, she unconsciously put herself in the role of a detective, thinking of making the murderer appear in front of people in that gorgeous and brilliant way.

But how can real criminal investigation work be so simple.

Not all murderers are balloons that expose themselves with a light poke.

"I see...", her gaze gradually became firm, "Mr. Matsuo! ”

"How, how?" Takashi Matsuo shuddered violently with fright.

He investigated Maoliran for an interview and knew that she was the women's karate champion in the Kanto region...

It is also known that she once sent several critically ill patients to the ICU ward of Mihua Hospital in a "justifiable defense" manner.

I also know that her mother is a well-known barrister and concubine... After a certain prisoner was beaten, he wanted to ask a lawyer to sue Mao Lilan for excessive defense, but the lawyer found out that the defendant was the daughter of the "undefeated myth" concubine barrister, and he didn't even dare to take the lawsuit.

This is simply the little bully of the rice flower iron fist, so domineering that it is frightening.

Therefore, now that he suddenly heard such a loud shout, Matsuo Takashi thought that this violent girl was annoyed and angry by him, and Wen Dou couldn't come to martial arts.

But Maorilan didn't do anything.

She just looked at Matsuo with a firm gaze, and said in a solemn tone:

"Dr. Edmund Locarder said that there is no such thing as a perfect crime, only undiscovered clues."

"Please be patient..."

"The evidence you want, we'll find it."

......................................

At 10:40, after finishing the battle book to Takashi Matsuo in front of the live broadcast camera, Lin Xinyi and the three hurried back to the 9th floor.

At this time, the large units of the Search Division 1 and the Forensic Division had already arrived at the scene from the Metropolitan Police Department building, which was not far from the television station.

Lin Xinyi handed Matsuo over to the search section for temporary custody.

At the same time, he asked the people of the forensic division to test Matsuo Takashi for gunsmoke, and was responsible for investigating whether there were fingerprints and dander on the pistol.

And Lin Xinyi himself is surveying the utility room on the 9th floor with Mao Lilan and Asai Narumi.

The utility room on the 9th floor is just above the utility room on the 4th floor.

Not surprisingly, this is the scene of the crime where Takashi Matsuo shot and killed Michihiko Suwa at that time.

They came here to investigate in order to find evidence that Matsuo had killed someone.

And Miss Mao Lilan, who had just declared war on the suspect Matsuo under the live camera, came to the scene at this time, but she couldn't help but show her inner uneasiness:

"Mr. Lin Xinyi, where do we start?"

"yes." Asai Narumi also sighed softly: "If the smoke test really doesn't work, and his fingerprints and dander can't be found on the gun, then how can we prove that he fired the gun?" ”

"Don't worry about these questions just yet."

Lin Xinyi is not as anxious to find a clear direction as Xiaolan and Chengshi:

"If we do a good job of on-site investigation, we will find all the clues that can be found."

"Maybe when the time comes, the answer will come to the surface on its own."

"Don't be stunned, let's get to work."

"This utility room is not very large, and if there is evidence, it should be found quickly."

"Hmm...," Moriran and Asai nodded in unison.

The first thing to check on the scene is the suspicious items that can be found with the naked eye.

And they soon had the results of their work:

"There's a transparent umbrella hidden in this cabinet!"

"There's an arm-thick hole in the center of the umbrella..."

With his gloved hands, Asai carefully took the transparent umbrella out of the cabinet:

"I see!"

"The killer must have been wearing gloves, sticking the pistol out of the hole and shooting again."

"In this way, all the shooting residue that was sputtered out when the gun was fired was blocked by the gloves and the umbrella surface!"

"That's how the killer used to evade the smoke test."

"That's a good point." Lin Xinyi encouraged him without hesitation, but poured cold water mercilessly:

"But it's useless to know how to do it..."

"Look, are there any fingerprints left on the umbrella?"

"Or, can you find the pair of gloves he's wearing?"

"This..."Narumi Asai was slightly stunned.

He immediately took a magnifying glass to carefully observe the umbrella, and then carefully searched the room:

"No... Fingerprints could not be found on the umbrella. ”

"I can't find that pair of gloves in the room, and they may have been disposed of by the murderer in some way."

"Then this umbrella can't be used as evidence..."

"Even, it can't prove that this utility room is the scene of the murderer's shooting."

Lin Xinyi sighed softly:

To prove that Takashi Matsuo is the murderer, you must first prove that the murderer used the technique of shooting down from the 9th floor to kill the murderer.

In order to prove that the murderer used this method to kill people, in addition to the bullet holes that have been found from the ground, it is also necessary to prove that the utility room on the 9th floor is the scene of the murderer's shooting.

The utility room on the 9th floor is the scene of the crime, and it is only deduced by them through the facts of the case.

To prove this, we have to come up with solid evidence.

"Let me think..."

"The killer poked his head out of the window and shot down."

"The shell must have been thrown out of the window, dropped onto the road, and was not found in this room."

"However, the killer used an automatic pistol."

"And the smoke of the automatic pistol is sprayed in the shape of a downward semicircle."

"So, even if the umbrella blocks the shooting smoke and doesn't spray it backwards on the murderer, there will definitely be some shooting smoke that sprays onto the wall of the window exterior wall."

Lin Xinyi quickly thought of a way to prove that the utility room on the 9th floor was the scene of the crime:

"There must be remnants left by the shooting on the window wall of this utility room!"

"As long as the shooting residue on the outer wall of the window is extracted and then tested for gunsmoke, it can be proved that this is the scene of the crime where the murderer fired!"

"Miss Maori, you're in charge of extracting the shooting residue!"

"Hmm." Maolilan nodded.

"By the way, you know which method to use to extract, right?" Lin Xinyi asked specifically.

Not surprisingly, the good student Maolilan gave the perfect answer:

"The exterior wall of the window is an object with a relatively flat surface, but relatively uneven, and with large pollution and low finish."

"To extract the shooting residue from such objects, the AC paper extraction method should be used."

AC paper is a film made of special fibers, with strong adhesion, good film strength and permeability, which is suitable for extracting shooting residues on uneven surfaces.

Answering Shanglin Shinichi's question, Mao Lilan quickly opened the on-site investigation box and groped for operation according to the knowledge he had learned.

She first holds a piece of AC paper with tweezers and soaks it in acetone liquid.

After the AC soaking had softened, the Maorilan was carefully removed and attached to the outer wall of the window, where there might be shooting residue.

Then, she carefully applied a second sheet of AC paper and gently pressed it with her fingers.

The AC paper covering the wall quickly dried, and Maoriran gently removed it from the wall and stored it, extracting the shooting residue from the wall.

And while she was busy extracting the remnants of the wall shooting...

Lin Shinichi and Asai Narumi were not idle.

They temporarily turned off the lights in the utility room, creating a darkroom with no light source interference.

Then, he took out a multi-band light source flashlight from the investigation box - after Lin Xinyi was in charge of the forensic class, the Metropolitan Police Department finally purchased this practical survey tool.

Lin Xin's flashlight source was adjusted to a wavelength of about 440nm, and he began to work with Asai Narumi to look for traces that were difficult to find with the naked eye at the scene.

Under this wavelength of light, most of the human body fluid spots will be excited to emit a faint natural fluorescence.

"Found it..."

"There is a dry saliva stain on the stacked cardboard boxes by the window!"

Lin Xinyi found an important clue.

And Asai Narumi carefully observed the saliva stain, and asked with some anxiety:

"Mr. Lin, could these saliva spots be left by the murderer?"

"Nine times out of ten."

Lin Xinyi pointed to the saliva marks on it and said:

"You see, this series of saliva stains are all splattered."

"Why is it a splash? Because when they leave the human body, they have a jet power. ”

"And that motivation is..."

"Sneezing? Or, cough? ”

Narumi Asai quickly reacted:

"By the way, that guy Matsuo just got the flu!"

"He has been coughing and sneezing, and these saliva spots are probably accidentally sprayed out when he committed the crime!"

Thinking of this, Asai Narumi couldn't help but say happily:

"Mr. Lin, isn't that enough?"

"There is DNA in the saliva spots, which can prove that Matsuo has been here."

"There are shooting residues on the exterior wall, which can prove that this is the scene of the crime where the murderer fired."

"In that case, isn't it possible to prove that Matsuo is the murderer?"

"It's not that simple..."Lin Xinyi shook his head:

"What if he quibbles and says he's been here during the day, or in the last few days?"

"This—" Asai Narumi choked slightly.

"It can be proved that Matsuo was at the scene of the crime, and it can't be proved that he is the murderer who shot here."

And Lin Xinyi sighed deeply and continued:

"So, what we have to prove now is..."

"At the point in time when the deceased was shot, Matsuo was at the scene of the crime."