Coroner Ke Xue

The Mumu Police Department turned away with some guilt.

He knew very well how incompetent the forensics class was:

The only thing these guys can do is wander around the crime scene with a camera.

Not to mention looking for potential traces that are invisible to the naked eye, even if they are "big ones" such as hair, earrings, dents, and thread marks, they often have to be reminded by famous detectives to discover them.

The forensics class was so incompetent that every time reporters came, the most embarrassing thing on camera was the search class.

When I went back to see the leader, the one who got scolded was the search class.

No matter what you do, you will be the first to blame others.

The evidence is invisible, and public funds are used for photography.

After thinking about it, the Mumu Police Department itself felt a little resentful towards the pig teammates in the forensics class.

Originally, he had instinctively rejected Lin Xinyi, a young man who was parachuted in as a management officer. Now that he thought about it,

Indeed, becoming a manager in a forensics class is like being a teacher in a kindergarten. If you have a bad attitude, you will become autistic.

"That's fine"

Seeing the guilty expression on the Mu Mu Police Department's face, Lin Xinyi sighed helplessly.

He turned his attention back to the case itself, then turned to the police officers from the investigation department and said:

"Give me your site survey package."

"Let me see what's in there!"

With that said, Lin Xinyi took the survey bag from the other party regardless, opened it and took a closer look:

Tweezers, tape measure, gloves, shoe covers, scale, notebook, marker, evidence bag, magnifying glass, flashlight, ordinary brush, fingerprint tape

Then it was gone.

The only piece of equipment inside that could be considered a technological survey equipment was the fingerprint tape used to extract fingerprints.

The autopsy department has equipment and no one, and the investigation department has people but no equipment.

Both sides hit the key points, and the dishes were very good.

“This is the level of forensics class”

"How did the Metropolitan Police solve crimes in the past?"

Lin Xinyi asked instinctively.

""

At this time, not only the police officers from the Forensic Section lowered their heads to study the floor, but also the people from the Search Section 1 also had hot faces:

How does the Metropolitan Police solve crimes? Of course it depends on the famous detective.

For a moment, the atmosphere was extremely awkward.

Mr. Seha Tatsutoku laughed heartily and almost stood up, patting the armrest of his wheelchair:

"Hahaha, this guy actually expects the Metropolitan Police Department to help him solve the case?"

"I definitely win today!"

With these thoughts in his mind, his expression became more stable.

But at this moment, Lin Xinyi let out a long sigh, and then said helplessly:

"Well this time I will help you find the footprints and handprints."

"Remember to go back and complete all the equipment for me, and learn on your own!"

"Uh?" Everyone was slightly stunned.

Especially Seha Tundoku, he was so frightened on the spot that his expression changed:

"No, doesn't it mean that you don't have any equipment? Can you still find traces that are invisible to the naked eye?"

"Huh?" Lin Xinyi cast his eyes suspiciously.

"Ahem, I'm just curious." Seha Tundoku defended with a difficult smile.

"sure."

Lin Xinyi withdrew his eyes thoughtfully and said firmly:

"Although without professional equipment, it is difficult to find the specific locations of handprints and footprints."

"But this time the situation is different. We can basically deduce the location of these traces based on the case and the scene environment."

"I just said that the footprints can probably be found on the balcony walls and handrails."

"What about handprints?"

As he explained, he slowly walked to the front of the balcony.

It wasn't until he stood in front of the wooden-framed glass balcony door that opened inward that Lin Xinyi turned around and asked the servants present:

"Is this balcony door usually closed?"

"Yes." The servant immediately replied: "This guest room has never been used. We will close the doors and windows after cleaning."

"That's good,"

Lin Xinyi looked at the wooden framed glass door and continued to explain:

"The murderer entered from the balcony. It is very likely that he pushed the door open from outside the balcony."

"And this is a glass grille door. If this door has been pushed open by the murderer, then we should be able to find the murderer's fingerprints on the outside glass of the door."

"bring it on"

As he spoke, he waved to the police officers in the forensics class:

"Come here, you guys also come and look for fingerprints on this glass door."

"Yes!" The young police officers gathered around.

Then, under Lin Xinyi's guidance, they gathered around and looked left and right at the glass door.

And then

"Nothing?"

Several Teletubbies looked over with such ignorant and innocent eyes.

"Well"

Lin Xinyi covered his face helplessly:

"You don't know how to find potential fingerprints on the glass?"

"Did you never sit by the window when you were in school?"

"Just breathe into the glass!"

The breath display method is suitable for objects with smooth surfaces that have weak water absorption properties.

This is a survey method that does not require any professional equipment at all and only requires an open mouth.

And every student who has sat by the window should have used this method unconsciously——

When you are bored in class, just spit hot air into the window, and those handprints and fingerprints that were originally invisible will be clearly visible on the glass.

"I see!"

The police officers suddenly realized it, and they immediately moved forward to release their breath.

"Wait, shut up!"

"I'll teach you another simpler method."

Considering the possible air pollution caused by this method, Lin Xinyi quickly stopped these overly enthusiastic students:

"Bring me the flashlight."

"Shine the light from the back of the glass at changing angles, and then observe from the front of the glass."

Without professional multi-band light sources, there are still ordinary white light flashlights.

What Lin Xinyi is now using is the transmitted light observation method, which can be used with just an ordinary flashlight.

To put it bluntly, this method uses light from the back of a transparent object, which is more suitable for investigating potential fingerprints on glass.

By constantly adjusting the angle, direction and brightness of the light source and adding an appropriate background, the contrast between the handprints and the background can be enhanced, allowing people to observe the handprints that are originally difficult to distinguish with the naked eye.

"Really, really!"

Looking at the blurry handprints that appeared under the light, these police officers from the Forensics Section, who had an annual salary of several million yen, marveled like children doing science experiments for the first time.

Then, they asked puzzledly and worriedly:

"But Mr. Lin Xinyi, is this fingerprint a bit blurry?"

"If you can just look at it with a flashlight, you can't compare it with the suspect's palm."

The fingerprints were indeed revealed, but they were still not clearly visible.

It would be a bit difficult to use this fingerprint to catch someone.

"It doesn't matter."

Lin Xinyi said calmly:

"Let's first confirm the ownership of this fingerprint before we talk:"

"First of all, the palm prints cannot be seen in the fingerprints on the outside of the glass door. The person who left the fingerprints should be wearing gloves."

"Secondly, it is not a sweat fingerprint, but a dust-layered fingerprint."

Dust-layered fingerprints, as the name suggests, are fingerprints formed by dust left by touching an object with hands stained with dust.

"The cleaning servants don't have so much dust on their hands, and the same goes for Manager Yamazaki who is a guest."

"And the murderer climbed the wall and balcony to enter the scene. His palms and soles must have been stained with a lot of dust from the outer wall."

"Gloves and dust are enough to prove that this fingerprint belongs to the murderer."

Hearing this, Seba Tundoku beside him swallowed nervously.

Indeed, he had just finished climbing the wall and pushed the door open with gray-stained gloves.

At that time, he didn't see that he had left any fingerprints. Unexpectedly, when the boy surnamed Lin took a flashlight and shined it, the invisible fingerprints were actually revealed.

Mr. Seba's heart was racing up and down like a roller coaster.

He gently wiped the cold sweat from his forehead and sighed secretly:

“Fortunately, fortunately, it’s a handprint whose outline cannot be clearly seen.”

"Otherwise we will be in big trouble."

Just as he was thinking this, Lin Xinyi suddenly said again:

"Now that we have determined that the fingerprint belongs to the murderer, we can extract it."

"It's very inconvenient to look at it with just a flashlight, but if you can extract it in the right way, you can further reveal it completely."

"After getting the extracted fingerprints, we can compare them with the outlines of the suspects' hands."

"Ah, ah?" Seba Tundoku's expression changed, and he forced himself to remain calm and asked pretending to be curious: "Can this handprint be extracted without equipment?"

Wouldn't this cost him his life?

In his nervous eyes, Lin Xinyi replied:

"It is true that the forensics class does not include equipment for extracting fingerprints."

"But Mr. Seba, you should have it at home."

"Uh?" Seha Tundoku was slightly startled: "Why is there such a thing in my family?"

"well"

Lin Xinyi sighed slightly:

There was nothing in the forensics class, forcing him to use crude methods from beginning to end:

"Wide tape."

"Just give me a roll of tape wide enough."