Accepting the collection of samples is a decision made by Kuroba Kaito after careful consideration.

After all, refusal would expose his identity and put him in a siege in the lobby on the first floor, where the police were most powerful.

What he's best at is infiltrating, not being matchless.

Whenever possible, Black Feather Kaito still prefers to choose to keep his disguise and approach the target in a low-key manner.

As for the footprints, palm prints, fingerprints, fingernails and so on left this time...

"It's a big deal to steal it back later."

Kuroba Kaito thought confidently:

Isn't it just stealing back the physical evidence you left behind from the Metropolitan Police Department?

This can still stump him to blame Kidd for not succeeding!

Black Feather Kaito knew in his heart that if he didn't send a notice in advance, but was bent on stealing quietly, I'm afraid no one in this world would be able to stop him.

In this case, even if Lin Xinyi was forced to leave these biological samples, the impact was actually not big.

So, with such an idea, Black Feather Kuaito honestly followed Lin Xinyi and came to the sample collection place.

The so-called "sample collection office" is actually a temporary table.

On the table, there are various collection equipment such as toothpicks, cotton threads, cotton swabs, scissors, white paper, and palm print printing boxes.

And next to this table...

There was also a tall, muscular young man with dark skin.

He was the only one in the audience who did not wear a police uniform except for Lin Xinyi.

"Who is this?"

"Kyogoku Ma, a friend who came to help." Lin Xinyi replied casually.

"Hmm..."Kuroba Kaito hadn't heard Kyogoku's name, but he still glanced at it with some concern.

And Kyogoku Zhen also nodded slightly at him politely, not realizing that the police officer in front of him was actually a fake.

Black Feather Kuaito returned a smile unhurriedly, and planned to sit down at the table with Lin Xinyi.

And then, he discovered...

There was also a dog lying on the ground not far away.

This is a purebred German Shepherd, tall and strong, with a shiny yellow-black coat and sharp and bright black jade eyes.

As soon as it saw someone approaching, it immediately pricked up its ears in alarm, bared its fangs, and fluttered to its feet from the ground.

"Don't be afraid."

Lin Xinyi said in a calm tone:

"It's called Caesar, it's the trump card of the police dog department, and it won't bite people casually."

The Identification Group is in charge of investigation, post-mortem examination and dog training.

Therefore, he, as a manager, will not only manage people but also dogs in the future.

Interestingly, the Department of Investigation and the Department of Post-mortem Examination of the Identification Division are currently pure places for the elderly, but the Department of Police Dogs, which is responsible for the training and management of police dogs, has always been operating normally.

So, if nothing else...

This German Shepherd named "Caesar"...

Now and for a long time to come, it will be the ace police officer of the forensic department, and the first cadre under Lin Xinyi.

Whether it is criminal investigation ability or work attitude, Caesar is obviously better than his colleagues in the forensic class.

"Uh... All right. ”

Seeing that the big dog really didn't mean to open his mouth to bite someone, and there was no sign of getting close to smell him, Black Feather Kaito put his mind at ease for the time being.

At this time, Lin Xinyi sat down at the table, and nodded at Black Feather Kuaidou and said, "Come, sit down." ”

"Hmm." Kuroba Kaito nodded.

Then he sat down with him, and placed the top hat and cloak he was holding in the corner of the table.

"What is this?" Lin Xinyi asked curiously.

"Sir, this is what I found while on patrol, the top hat and cloak left behind by Kidd the Thief."

"I'm here to report on this discovery."

"Oh?"

"Blame Kidd the thief for something left behind?"

Lin Xinyi seemed very interested, but he still didn't forget the business:

"Okay, then you can put this top hat and cloak aside."

"After the collection of samples, tell me about the situation in detail."

"Hmm!" Black Feather Kaito nodded, and asked again, "Then, sir, which one to collect first?" ”

"Nail it."

"I did the most troublesome thing first."

As he spoke, Lin Xinyi handed a pair of nail clippers to Black Feather Kuaidou.

Under his gaze, and dozens of policemen and more than a dozen police dogs, Black Feather Kuaidou picked up his nail clippers without changing his face and cut off a small piece of his nails.

Lin Xinyi carefully picked up the nail with tweezers and put it into the prepared plastic evidence bag.

Then, he suddenly reached out again and gently pressed Kuroba Kaito's arm before he could withdraw it.

"Sir... What is this for? ”

Black Feather Kaito's nerves suddenly tensed.

"Collect the dirt."

"When I say nails, I include nail pieces and nail scale."

Lin Xinyi replied as usual.

"Nail scale? But I don't have any dirt in my fingernails..."

Just like a beautiful little fairy can't fart, how can a handsome heartthrob like him not have clean nails?

"It's not clean, but you can't see it clearly with the naked eye."

"Everybody's nails are more or less dirty."

As he spoke, Lin Xinyi methodically put on latex gloves for himself, picked up a thin toothpick, and carefully wound a thin cotton thread around the tip of the toothpick.

He then gently dipped a toothpick wrapped in thin cotton thread in saline to shake off the excess water.

In the end, Lin Xinyi gently grabbed Black Feather Kuaito's hand.

Like a skilled manicurist, he stabbed the tip of a toothpick firmly into the crack of Kuroba Kaito's nails, carefully rotating and wiping along the nail bed.

Black Feather Kaito felt slightly uncomfortable.

But Lin Xinyi quickly finished collecting nail scale.

He took the toothpick out of the crack in Black Feather Kuaito's armor, and the cotton yarn on the top was indeed stained with some slightly blackened dirt.

"Alright, the nail is done."

Lin Xinyi also put the dental floss stained with nail dirt into the plastic evidence bag.

Immediately after, he turned around and handed the two evidence bags to Kyogoku Shin's hand:

"Kyogoku, these two samples will be kept by you."

"Oh?" Kyogoku was slightly stunned, and immediately reacted.

"Understood." He carefully held the two bags in his hands, and there was a flash of sharpness in his eyes.

And Lin Xinyi turned his head casually, and smiled at Black Feather Kuaidou with a kind face:

"Come on, let's move on to the next one."

As he spoke, he laid out a palm print box and a clean white piece of paper.

"This time to collect fingerprints and palm prints, it's very simple, just press the ink of the stamp box with your hand."

Lin Xinyi's smile was still calm, as if he was just going through the process step by step.

If everything goes well, listen to him and honestly complete the collection of samples, and Kuroba Kaito will be fine

However, at this moment...

Black Feather Kaito was silent.

"How?" Lin Xinyi asked puzzledly, "Is there any problem?" ”

Black Feather Kaito was still silent.

Then, a helpless smile suddenly appeared on his mask-covered face:

"Alas... What a hassle. ”

"Tell me, how did you see through my disguise?"

As soon as these words came out, the air suddenly became extremely quiet.

The surrounding police officers were slightly stunned, and in the next moment, dozens of guns were pointed at again.

And the puzzlement on Lin Xinyi's face quietly disappeared, replaced by a trace of surprise and a hint of banter:

"You found out I found out you're the thief Kidd?"

"How... Is there something wrong with my acting skills? ”

"Nope." Black Feather Kaito shook his head: "Although your acting skills are indeed average, the real problem is..."

"Name, you didn't ask my name."

"The other bags are labeled with the name of the source of the sample."

"But you didn't ask my name from beginning to end, and you just handed the nails you collected from me to the guy named Kyogoku Shin for safekeeping."

"I see."

"It seems that I was indeed in a hurry."

Lin Xinyi thought to himself.

"I've answered your question."

Surrounded by dozens of guns, Black Feather's expression was still calm:

"So, how exactly did I get exposed?"

"Is it because of the footprints you walked in?"

"You guessed that, too?" Lin Xinyi was surprised by the other party's quick thinking.

It seems that the legendary thief Kidd really has two brushes.

"That's right, from the moment you walked in the door, I could already see something wrong from the footprints."

"Because, you seem to be wearing a shoe that doesn't fit so well."

"If I'm not mistaken, you probably stole this Metropolitan Police Department's standard leather shoes from the policeman you replaced, right?"

"And your real foot size should be slightly smaller than this officer."

Lin Xinyi explained vaguely.

He knew in his heart that the footprints of small feet wearing big shoes were obvious on the soil.

Just like Black Feather Kaito, the "big shoes" he is wearing now are probably within 1.5cm larger than the red footprints, and as a result, the following footprint characteristics have been formed:

The inner and outer sides of the palm of the shoe print are obviously hypopressed.

The heel weight is pressed back, and the front edge of the big toe weight is about 2cm away from the front edge of the shoe print, and the inner and outer sides of the shoe print are pressed virtually.

The weight pressure of the first plantar region is reflected at the lower end of the inner palm of the shoe print, and the inner arc of the weight pressure surface is about 1 cm from the inner edge of the shoe print.

The weight of the fifth metatarsal region is reflected on the anterolateral aspect of the arch of the shoe print, and the outer arc edge of the weight pressure surface is close to the outer edge of the shoe print.

........

These footprint characteristics are difficult to distinguish in the eyes of ordinary people, but Lin Xinyi can see through them at a glance.

Therefore, Lin Xinyi discovered the strangeness from the moment Black Feather Kuaidou entered the door, and regarded him as the focus of suspicion from beginning to end.

"It's because of the shoes..."

Black Feather Kaito couldn't help but feel a little emotional:

In order to perfectly disguise himself as the replaced patrolman, he specially put on this pair of Metropolitan Police Department-style leather shoes that were taken off the other party's feet and did not fit well.

But he never expected that these shoes betrayed him at the first time.

"You can see so much from a shoe print..."Kuroba Kaito exclaimed from the bottom of his heart, "It's really a detective who has been in the limelight more than me lately!" ”

"Forensic doctor, I'm a forensic doctor."

Lin Xinyi corrected unhappily:

"Detectives run into dead people every day, it's too unlucky."