Hearing this, even if he is not very good at reasoning, Sonoko can understand the dilemma that Kudo Shinichi is facing at the moment:

The method can be seen through at a glance, but there is no physical evidence that can lock the murderer.

He wore latex gloves and did not leave fingerprints at the scene.

After killing someone, he threw his gloves into the toilet bowl and flushed them off, and he didn't have a chance to collect the dander from the items he left behind.

And looking around, except for a few bloody fingerprints without fingerprints, the naked eye can not find any other useful traces such as shoe prints and palm prints.

"In that case..."

Seeing that Kudo's side was already in trouble, Suzuki Sonoko couldn't help but look forward to her idol's answer:

"Mr. Lin Xinyi, what do you think of this case?"

"Huh?" Lin Xinyi, who had been silent, finally reacted.

He had just been staring down at the corpse and the blood-stained floor, as if he were in a daze.

And now, when I looked up, the garden suddenly discovered...

There was no trace of confusion in Lin Xinyi's eyes:

"What Kudo just said is very accurate."

"Although the possibility of premeditated murder cannot be completely ruled out."

"But judging from the current clues, it is more likely that it is a temporary robbery and murder."

Lin Xinyi first characterized the case at the beginning.

Although his words are more cautious, in the end, the meaning of his expression is actually exactly the same as that of Kudo.

It's just that Kudo likes to start from the clues of the scene, and he is more accustomed to observing corpses:

"After a preliminary examination, there were only two visible wounds on the body surface of the deceased:"

"The first place is a small area of subcutaneous hemorrhage in the back of the neck, which is formed by an external blow."

"This form of assault on the back of the neck shows that the killer did not intend to kill in the first place, but only wanted to make the deceased unconscious."

"So Kudo is right, this case is most likely a robbery."

Through the wounds on the deceased's neck, Lin Shinichi confirmed Kudo's inference about the case.

Then, he glanced at Suzuki Sonoko meaningfully:

"Speaking of which, this wound on the deceased is very similar to the bruise on your neck, Miss Suzuki."

"She should have been attacked in the same way as you."

"But alas, this lady is not as alert as you."

"She wasn't knocked unconscious by the murderer's blow, and she didn't pretend to be stunned in time like Miss Suzuki, and as a result..."

Sonoko Suzuki: "......"

She felt a chill down her spine as she listened.

This deceased said that what happened to her was the same, they all went into the bathroom where no one was making up, and they were all attacked on the back of the neck here.

It's just that she reacted in time and pretended to faint.

Otherwise, she would probably be like this deceased, brutally murdered by the murderer in this bathroom.

"Luckily... Fortunately. ”

Sonoko Suzuki muttered softly with some trepidation.

And Lin Xinyi continued to elaborate on his thoughts and discoveries:

"The second wound is an oblique wound located in the xiphoid process of the chest, the wound margin is neat, the wound wall is smooth, there is no intertissue bridge in the wound cavity, and the wound angle is blunt and sharp."

"This is an obvious single-edged sharp stab wound."

"And judging from the pale skin of the deceased and the nails of both fingers, as well as the amount of bleeding in the chest and abdomen..."

Lin Xinyi moved his gaze to the deceased's chest and abdomen, which were completely red with blood:

"Judging from the angle of the knife, as well as the length of the murder weapon.... The knife was supposed to have cut the pericardium, causing the inferior vena cava to rupture, enter the right chest cavity and puncture the lungs, eventually causing hemorrhagic shock and death. ”

After saying this, Lin Xinyi directly summarized the clues and reviewed and restored the case process:

"According to the existing clues, it is likely that the murderer saw the deceased who entered the bathroom alone in order to put on makeup while waiting for the train on the platform."

"Because the deceased was dressed fashionably and exquisitely dressed and looked like a rich man."

"And the bathroom is being repaired and no one is in or out, so it is more suitable for committing crimes."

"So the murderer made a temporary decision and quietly followed the deceased into the bathroom, preparing to stun the deceased by attacking the deceased from behind, and then robbing her of her property."

"But... The deceased was not as easily knocked unconscious as the murderer had imagined. ”

"The deceased not only did not faint, but was still awake and ready to call for help, even resist."

"This makes the killer very nervous – because there is a crowded platform outside, and if there is a disturbance, he will be found immediately."

"So, in order to bring the situation under control in time... The killer took out the short knife he was carrying, and almost without hesitation, stabbed the lady in the chest. ”

Lin Xinyi took a deep look at the lady who died tragically in a pool of blood:

"For such a simple and ridiculous reason..."

"A young life has passed away."

If you see too many cases, you will always sigh at the fragility of life and the impermanence of fate.

Suzuki Sonoko felt the kind of sentimentality that Lin Shinichi showed, and couldn't help but become quiet.

However, after a short silence ...

"Wait..."

Suzuki Sonoko reacted suddenly:

"That's pretty much the same as what Kudo just said, right?"

Although the way of telling is different, and the way of discovery is also different, what Lin Shinichi is saying now is nothing more than repeating Kudo's reasoning again.

Even, there are some places where he doesn't have Kudo to say in detail.

For example, Kudo also confirmed that the murderer was wearing latex gloves through bloody fingerprints and small blood droplets, and knew that the murderer went to the toilet cubicle after killing people and flushed the gloves into the toilet.

In contrast, Lin Xinyi's reasoning focuses more on restoring the details of the deceased's life experience, telling the suffering of the deceased, but...

After some talking, the most critical problem has never been solved:

"How do you find out who the murderer is?"

Sonoko Suzuki asked suspiciously, and Kudo Shinichi also cast an inquisitive look.

"It's simple."

Lin Xinyi replied very lightly:

"The murderer has the blood of the deceased, just find the one who has the blood on his body."

"It's... Unlikely, right? ”

Kudo Shinichi immediately objected:

"There was no clothing left at the scene, indicating that the deceased fled directly wearing the clothes he wore when he committed the murder."

"If blood is splattered and stained on the body, how can the murderer blend into the crowd in this blood-stained clothes?"

"And if the blood doesn't splatter, it just flows down the blade of the knife...""The murderer has gloves on his hands, as long as he pays a little attention, his body will not be stained with blood at all."

"No... It's covered with gloves, but it makes the possibility of getting blood small. ”

"But that doesn't guarantee that there won't be."

Lin Xinyi retorted in a manner similar to raising the bar.

"Uh..."

Kudo was speechless:

Indeed, there is no guarantee that there will be none.

Then try to look for it, maybe you will find the one with blood on it.

There's nothing wrong with that, but...

This is more like luck, and it doesn't show Lin Xinyi's technical level.

If you're unlucky and don't bump into... Then it would take a lot of effort to investigate more than 100 people.

And that's more than 100 impatient Tokyo citizens, and now they can stay here, which is already giving face to Maoliran's fist.

But Xiaolan won't really do it after all, and those passengers will never honestly wait there all the time, so that the investigator will come and try to investigate if he thinks of a way.

If the time drags on for a long time, more than 100 citizens gather to make a fuss, even the Metropolitan Police Department will have to release them obediently.

Therefore, it is necessary to come up with accurate and effective investigation methods as soon as possible.

That's what Kudo thought.

But then, unexpectedly, Lin Xinyi immediately added evidence for his opinion:

"There is a possibility of getting blood."

"And I can prove that the murderer must have had the blood of the deceased on his body."

"Look at those little drops of blood on the ground—"

As he spoke, Lin Xinyi pointed his finger at the long string of small blood droplets on the ground.

The bits and pieces of blood spread from the lodging of the deceased's body to the toilet cubicle where the killer had abandoned the knife.

Obviously, as Kudo reasoned, this was a drop of blood that fell from the murderer's way to the toilet cubicle with a knife after killing someone.

But Lin Xinyi saw more things from these small drops of blood:

"This kind of blood droplet is called dripping blood stain in traces."

"The so-called dripping blood stain is a blood stain formed by blood dripping onto the surface of an object under the action of gravity."

"This blood stain is generally round or quasi-round."

"However, in most cases, the surface of the object where the blood drips is not smooth."

"So, there will be 'burrs' around the dripping blood."

(Something that looks like this :☼)

As he spoke, Lin Xinyi motioned for Kudo and the garden to come closer, squatted down, and observed the small blood droplets on the floor up close.

Sure enough, they all noticed that around the round blood droplets, there were "fine blood needles" visible to the naked eye in the shape of stars, protruding in all directions.

At this time, Lin Xinyi further added:

"If you take a closer look, are most of the burrs of these blood droplets long and short on the other?"

"Really... Although it is not obvious, you can still see that the burrs on the left and right sides of a blood drop are not the same length. ”

Miss Suzuki sighed as if she had discovered a new world:

"Why is that?"

"Because these drops of blood are all dripping while the murderer is in motion."

Lin Xinyi explained carefully:

"Blood droplets that drip vertically at rest are surrounded by burrs of uniform size and length."

"But when the killer was walking towards the toilet cubicle, the blood droplets falling from his body would have a horizontal acceleration."

"When the blood droplets fall to the ground, the blood will condense more in the direction where the acceleration is directed, and the burrs will be longer in that direction."

"That is to say..."

Lin Xin paused for a moment and explained emphatically:

"The side where the burr grows is the direction of the murderer's movement at that time."

"For example, the long burr of this drop of blood pointed at the toilet cubicle, which proves that the murderer was indeed carrying a blood-stained knife and walked in the direction of the toilet cubicle."

"This..."Sonoko Suzuki listened a little confused:

"What's the use of knowing this?"

"After the murderer killed someone, he went to the toilet cubicle and threw the murder weapon and gloves, isn't this the conclusion that Kudo has already reasoned?"

"No... This is useful. ”

It was Shinichi Kudo who spoke out in denial.

He stared carefully at the ground, his eyes incomparably focused:

"I know what Mr. Lin Xinyi means."

"The pointing of the burrs in the blood droplets can show the direction of the murderer's movement at that time."

"And the blood here..."

Kudo Shinichi pointed to a special drop of blood on the ground:

"Not all blood droplets, it's long burrs pointing at the toilet cubicle."

"There were several drops of blood in it, the edges of which were pointed with long burrs pointing ... It's in the exact opposite direction to the other blood droplets! ”

"Huh?" Sonoko Suzuki couldn't keep up with the rhythm anymore.

"Remember, the long burrs of the blood droplets point in the direction of the murderer's movement at the time."

Looking at Miss Yuanzi, who was a little dizzy, Lin Xinyi once again emphasized this knowledge point:

"And the long burrs of several of these droplets point in opposite directions, indicating that..."

"These drops of blood are not like other blood drops, they did not fall on the way to the toilet cubicle."

"They dripped on the killer's way back from this toilet cubicle to the sink, so the burrs would go in the opposite direction to the other blood droplets."

"That is to say..."

"The murderer after throwing the murder weapon in the cubicle and the gloves in the toilet..."

"There's still blood falling from him!"

"At this time, the blood dripping was not on the gloves and the murder weapon at all, but directly on the murderer's body."

Finally, Lin Xinyi seriously concluded:

"So, it's not hard to imagine that the gloves didn't completely block the bubbling blood of the deceased at that time."

"The blood must have flowed to the murderer's arm, and we only need to find the person whose arm is stained with the blood of the deceased to determine who the murderer is."

"That's true..."

"But..."

Kudo quickly found a loophole in Lin Shinichi's idea:

"After the guy threw away the murder weapon and gloves, he should have gone to the sink to wash his arm."

"Otherwise, if there is conspicuous blood on his arm, I am afraid it will be difficult for him to blend into the crowd."

"It's okay."

Lin Xinyi smiled very calmly:

"Even if he washes his hands clean, it's useless."

"As long as it's really bloody, I'll be able to get him out!"