The next day, in the afternoon, in the mountains and forests far away from the city.

Lin Xinyi was holding a forensic investigation box in one hand and a big dog in the other.

Maolilan holds a site investigation box in one hand and a Conan in the other.

The two walked side by side among the leafy trees, but they didn't look like leisure tourists who came to the mountains for a party, but like a professional team who came to investigate and conduct an autopsy.

They didn't say a word, their expressions were serious, they just walked silently through the woods.

Finally, Conan couldn't help but break the silence:

"Sister Xiaolan, are we lost?"

"Hmm..."Mao Lilan, who had been in charge of reading the map to guide the way, smiled a little awkwardly: "No, it won't, right?" The villa should be around here. ”

"Really... But we've been walking around the woods for almost an hour. ”

Looking at the green forest in front of him, which seemed to have no end to itself, Conan sighed helplessly.

"Ahem... I called and asked about the garden. ”

"Conan, you help me carry the box."

As he spoke, Mao Lilan let go of Conan's hand and stuffed the on-site investigation box into Conan's arms by the way.

The box was light and weightless to her, but in the hands of Conan, who had small arms and legs, it was as heavy as a stone.

He staggered, and it was only with great difficulty that he could stand still.

"Really... Why do you bring such a thing to a party? ”

Conan vigorously carried the survey box in his hand, took advantage of Mao Lilan's phone call, and quietly approached Lin Xinyi's side:

"Hey, Lin, are you hiding something from me?"

"Just to a party, why bring the survey box and Caesar?"

As he spoke, he couldn't help but glance at the big black-backed dog who was really obediently squatting next to Lin Xinyi, spitting out a pink tongue:

Conan knew that this dog was the ace police dog of the identification section, and he was a national civil servant with an establishment.

How could Lin Xinyi be a good dog for private use and take Caesar out for travel?

So, in Conan's opinion...

He must have mastered some important clue that no one knows, so he would be so armed to "travel" here with them.

"Didn't I say that... I don't have any clues. ”

"Bring the dog and equipment, just worry that someone will be killed by you."

Lin Xinyi was a little helpless to explain to this overly curious detective again.

What he said was the truth, but Conan, who had no self-knowledge, always felt that Lin Xinyi was hiding something from him.

Conan, who was full of curiosity, still wanted to stick to Lin Xinyi and ask questions.

Mao Lilan on the side was holding a mobile phone and walked over with an embarrassed face:

"No, the location in the mountains is too remote."

"There is no signal on the mobile phone, and the call cannot be made."

"Don't worry, look at the map more, you should be able to find the way."

Lin Xinyi's tone was very calm, but he sighed softly in his heart:

Barren mountains and mountains without even a mobile phone signal... It's a great place to commit a crime.

Coupled with Conan, the lone star, I'm afraid I'm going to die today.

If so, has the murder already happened? Do you have a chance to stop it?

Lin Xinyi was silent in thought, and Mao Lilan was also looking at the map seriously.

Conan, on the other hand, after boredoming observing his surroundings, found some clues that would help them find their way:

"Look, there are several fresh footprints on the muddy ground over there—"

"There aren't many people around here, so the footprints should have been left by the people who arrived at the villa before us."

"Follow these footprints, and you'll probably find that mountain villa."

With that, Conan walked to the front and followed the footprints to guide everyone.

Lin Xinyi, Mao Lilan, and Caesar followed.

But not long after the group walked, the dirt road turned into a stone path, and the footprints could no longer be seen with the naked eye.

There are several forks in front of this stone road, and there are no footprints to guide them, making it difficult to choose the direction.

"I'll look at the map." Confused, Maolilan picked up the intricate map.

"Since they walked this road before us, there should be some clues left behind."

Conan carefully observes the details of the fork in the road, trying to use reasoning to determine the right direction.

And he didn't have time to start reasoning ...

Lin Xinyi gently tugged on the dog leash and let the black-backed big dog next to him stand up:

"Let Caesar come."

"There is also a human smell left on the footprints."

"If these footprints were really left by people who went to the villa for a party, then Caesar would have been able to recognize the way."

"Woohoo!"

Hearing Lin Xinyi call his name, Caesar immediately responded.

It grinned its fangs, pricked up its ears, and wagged its tail, and its eyes suddenly became sharp when it looked at Han Han when it was leisurely, and it entered a state of work standby in an instant.

"Miss Maori, just right, come over and review the relevant knowledge points of the footprint sniffing source."

"How many people's footprints are here, which do you think is better to use to make the police dog track?"

Led Caesar to the mud with footprints, Lin Xinyi did not forget to teach the students.

"Which footprint is better to use as a source of smell?"

Seeing that Lin Xinyi suddenly arranged "practical training", the studious Mao Lilan also came to the spirit.

She put down the map, came to Lin Xinyi's side, squatted down with Lin Xinyi, and lowered her head to study the footprints on the ground.

Although the distance between the two is not close enough to make physical contact, it is definitely not far.

Seeing this scene, Conan suddenly lost the mood to reason.

It's like seeing your own tender cabbage being put in the mouth of other pigs...

He held back a small face that was not very good-looking, and squeezed into the middle of Lin Xinyi and Mao Lilan.

Conan, who graduated from Hawaii and knows everything, wants to use this way of building a "border wall" to completely separate his childhood sweetheart from potential rivals.

But this "border wall" has not been built for long ...

"Conan, don't get in the way of me talking to your new brother."

With a slight mention, Maolilan took Conan out.

"Sister Xiaolan..."Conan still wants to sell cuteness and stay.

But Mao Lilan was like Shinichi Kudo who had encountered the case, staring intently at the footprints on the ground, completely ignoring him.

Conan was helpless for a while.

There is no way, Xiaolan, who was originally gentle and virtuous, has become a "reasoning maniac" who is obsessed with solving cases.

Conan had no choice but to try to stand on the other side of Lin Xinyi, thinking about dragging this rival out further.

But it's a pity that Lin Xinyi's position on the other side is being occupied by a big dog that weighs twice as much as Conan.

"Wow!"

Caesar bared his teeth in displeasure at the imp who had squeezed in, indicating that the spot had been taken by the dog.

Disgusted with dogs, Conan finally gave up the struggle completely.

And in his sullen gaze...

Maolilan stared closely at the footprints on the ground and began to analyze them methodically:

"I remember Mr. Lin, you taught me... The smell in the center of the footprint comes mainly from the sweat secreted by the soles of the feet. ”

"Some of the odor molecules spread outward through the upper and upper, and the other part slowly penetrates deep into the sole and slowly penetrates the sole to the ground."

"So, depending on the sole material, the time it takes for the odor molecules to reach the ground will also vary."

As a serious scholar, she recalled the knowledge taught by Lin Xinyi word for word.

Then, in Lin Xinyi's encouraging and appreciative gaze, Mao Lilan continued to analyze:

"In these shoe prints..."

"There are two groups of shoe prints that are more reflected, and the traces of knocking, digging, picking, and twisting are more and more obvious, and the forefoot pressure is heavily moved forward, and the weight pressure point and the arch of the foot are not clearly reflected - it should be leather-soled shoes."

"The other groups of shoes have relatively complex prints, complete footprints, and clear gait characteristics, which should be rubber sole sneakers with better toughness and elasticity."

"The smell penetration of leather-soled shoes is better than that of rubber soles, so if you want to choose a highly recognizable police dog sniff source, you should choose from the shoe prints of those two pairs of leather-soled shoes."

"In the shoe prints of these two sets of leather-soled shoes, there is a pair of shoes with a smaller size, a narrow toe, a deep forefoot pressure surface, obvious load-bearing, and a far distance between the hind foot and the forefoot pressure surface, which may be a women's high-top sports leather shoes."

"The upper is too high and the sole is too thick, which is not conducive to odor penetration."

"So, exclude the shoe prints of this set of women's leather-soled shoes..."

Pointing to one of the many shoe prints, Maolilan confidently concluded:

"It's best to choose the shoe print of this men's leather-soled shoe to use Caesar as a source of smell for identification!"

"That's right."

Lin Xinyi nodded with satisfaction, and gave the student a full score in his heart.

Being able to put the knowledge in the book into practice shows that Maolilan not only memorized the knowledge in class, but also spent a lot of time after class, carefully observing and studying the actual forms of various footprints.

"Miss Maori, your abilities have improved very quickly."

"If those guys in the forensics class could have your level and attitude, I wouldn't be so tired."

Lin Xinyi sighed from the bottom of his heart.

"No... It's all Mr. Lin Xinyi, you taught well. ”

Maoliran smiled modestly and replied embarrassedly.

The teachers and students exchanged friendships, and the atmosphere was extremely harmonious.

Conan was the only one who wasn't happy.

And after so many days, Lin Xinyi has long been accustomed to this little face of the sea of vinegar.

Ignoring Conan's resentful eyes, he instructed Maolilan to take out a clean steel shovel from the survey box and collect the top layer of dirt that binds the most to the scent molecules.

Collect the surface soil that is the source of smell, and then take it to an open area with less odor interference, and let Caesar smell and identify it.

"Woohoo!"

Caesar sniffed the dirt and sniffed around the ground with his head down, quickly confirming the direction.

"Okay, follow Caesar!"

The group set off again, and Maolilan followed closely behind Caesar.

But Conan quietly grabbed Lin Xinyi's arm and said a little depressedly:

"Lin, how many times have I told you..."

"Keep your distance, keep your distance from Xiaolan!"

"Hey, hey... I was just teaching normally. ”

"What the hell do you have in your head?"

"She studied forensic medicine with me, why do you always think about the clinical side?"

Lin Xinyi had no ghost in his heart, and answered frankly.

"Also, you're so worried about being poached, why don't you just identify yourself with your childhood sweetheart?"

"When you rushed out to solve the case, you dared to do it..."

"How did you know to be cautious and confidential in front of Miss Maori?"

"I—" Conan was momentarily speechless.

"Enough... Conan. ”

Lin Xinyi didn't bother to talk to this little vinegar jar anymore:

"You can rest assured now."

"I'll tell you the truth—"

"I already have a girlfriend, I just caught up."

In and out of the words, there is a little pride.

A single dog with a girlfriend is like a nouveau riche who has won the lottery and always wants to show off.

And his words soon caused a silence.

In the silence, Conan's little face was full of shock:

"'Chasing' girls... Just you?? ”

Lin Xinyi: "......"

Bastard, where did you come from to despise me!