Noon.

The sun was high up in the sky, shining down intensely.

The rocks on the mountaintop were scorching hot, as if they were a teenage boy's groin.

The gravel and broken minerals on the ground were shaking under the wind, rough and coarse, even the dog found it unpleasant.

"Strong, sit." Li Li's voice was light and crisp, like a breeze that swept through everyone's hearts.

The criminal investigators in Changyang City were tired and hot, but when they heard Li Li's voice, it was like their hearts were cooled in an air-conditioned room.

"Which unit is she from?"

"This voice...a sweet girl like her being a police officer would make the suspects melt."

"Actually, being a dog isn't bad either."

During their break, the group chatted aimlessly.

Even the leaders sat on a few rocks and listened to their subordinates' discussions, ignoring them. The command vehicle was right there, with air conditioning, but no one said anything about going inside to rest.

Today was a multi-agency operation, with people from the provincial department, Changyang City bureau, Ningtai County Criminal Investigation Brigade, forest police, local police stations, as well as several journalists invited by Liu Jinghui and several police dog units.

In this kind of environment, even those who were afraid of hardship and fatigue wouldn't show weakness in front of everyone.

At the very least, they couldn't let the dogs laugh at them.

"Rest for another fifteen minutes, then we'll start entering the mine. The police dogs can rest for an extra fifteen minutes." Yu Wenshu, the commander on site today, was the head of the Changyang City Criminal Investigation Support Team.

The case was too big, not to mention the various aspects involved, the social impact alone made everyone have to take it seriously.

At times like this, even if they wasted a trip, they wouldn't be afraid, they were afraid of wasting their lives for nothing.

Liu Jinghui wiped his sweat and answered.

Since entering the mountain, he had become somewhat quiet.

The abandoned mine was much more complex than what was seen in the report. Even though nearly three hundred people had gathered, causing the road to the mountain to become congested, once they entered the mountain, it was still like going shopping with their wives on the weekend, confused and not knowing where to go or what to do...

Not far away, under the shade of a tree by the roadside, Strong was the same.

In front of him was his familiar bowl, filled with boneless chicken legs, fresh chicken cutlets, large pieces of beef, and a variety of vegetables. Strong could smell the familiar aroma without even lowering his head. It was definitely the food made by his trainer, Comrade Li Li, with her long legs, the appearance was beautiful and the taste was extremely delicious.

If it were a normal day, Strong would have been at ease eating.

But today was different.

Next to Strong, was the heroic dog from Longli County, Heizi.

In Heizi's bowl, there were boneless chicken legs, large pieces of beef, extra-large pieces of beef, eggs, tender egg yolks, chopped fruit and even more vegetables, as well as yogurt...the glossiness and appearance of the food made the dog drool just by looking at it.

Not only that, but Heizi also had another bowl, filled with meat porridge and unknown contents.

When have you ever seen a dog with two bowls?

Stray dogs don't have them, pet dogs don't have them, police dogs don't have them, military dogs won't have them!

One dog, one bowl, holding their own bowl, lined up and obeying orders, eating only one meal a day, this was the standard for police dogs, the most basic knowledge that Strong had learned since joining the police force, the cornerstone of all knowledge.Today, the cornerstone has been shattered.

The dog next door in the neighboring county really has two dog bowls!

Not only Strong, but also the police dogs Tiger and Leopard from the Changyang City Police Dog Brigade on the other side, were staring at the black spot in the middle with their big eyes, without looking away.

Black Spot was swaying its tail leisurely, looking straight ahead with its head slightly raised, as if it didn't notice the surrounding gazes at all.

On both sides, whether it was Strong or Tiger and Leopard, their tails were stiff and their heads were incredulous.

Li Li squatted down and whispered to her police dog, "Uh, Strong, let's not compare with others. It's old and needs to take care of its health. Eating too much during the mission can make it drowsy and not conducive to performance."

The neighboring dog trainer could only squat down and persuade, "Being a police dog is not about eating or wearing, it's about combat effectiveness. It has won the second-class merit medal, so it's normal for its daily food expenses to be a bit higher, right? This time we will also get the second-class merit medal, and we will also eat 90 yuan a day in the future. Okay?"

The police dogs remained silent.

Half an hour later.

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Under the command of the trainers, the police dogs began to search in the designated direction.

Jiang Yuan watched with his neck stretched out. He was not sent out and stayed in front of the "leadership team" for consultation.

Yu Wenshu, the head of the Criminal Investigation Detachment of Changyang City, gave continuous orders. After everything was on track, he took a sip of his own hot tea and looked at Jiang Yuan with a smile, "Is Little Jiang nervous? This time we followed your script."

Jiang Yuan snapped out of his thoughts and quickly said, "No, I just did some insignificant work."

"When it comes to this term, the concept of trace evidence, I heard about it twenty years ago. When it really plays a key role in solving the case, it is really rare." Yu Wenshu clicked his tongue and said, "From now on, trace evidence will be the clues to solving the case."

"I only understand the extraction of trace evidence and the investigation of crime scenes. I don't know anything about testing. For this, we rely on the trace evidence laboratory of the Provincial Department." Jiang Yuan had to be modest.

Yu Wenshu nodded at Jiang Yuan and said, "You hit the nail on the head. When our detachment's trace evidence laboratory gives us a report, they only report their testing capabilities and how rich their testing methods are. But when it comes to crime scene investigation, they don't say anything, and they don't mention their own ability to extract trace evidence from the scene. Our criminal investigators don't understand it either. If the two sides don't come together, how can we solve the case?"

"The technicians don't understand the scene, and the scene doesn't understand the technology." Gao Qiang, a third-level senior police officer from the Provincial Department, agreed, "Just like taking fingerprints, the fingerprints here need to be taken well, so that the trace evidence examination can have the space to display its technology. By the way, Jiang Yuan is also good at trace evidence examination. He was the one who led the 326 case."

"Jiang Yuan's main job is still forensic medicine. Speaking of which, when I first joined the police force, the technicians were like Little Jiang, they could do everything, from fingerprints and footprints to autopsies, toxicology, and even ballistics in shooting cases..." Yu Wenshu looked at Jiang Yuan while speaking, and the more he looked, the more he appreciated him.

Nowadays, able-bodied criminal investigators who can run and fight are not rare. Graduates of police academies have good physical fitness, but their bodies can't withstand the long-term work of criminal investigators. Ordinary technicians are not rare either. There are many college students everywhere, and as long as they hear that there are positions available, they will compete for any job openings. With a little training in relevant majors, they can handle daily business.However, technicians who can really solve cases with their skills, instead of being a Monday morning quarterback, are very rare.

In the Criminal Investigation Brigade of Changyang City, there were naturally many experts, but who could refuse more experts? Like a general, the more soldiers under his command, the happier he would be.

Before Yu Wenshu could speak, his walkie-talkie on his waist crackled.

"There's a situation at position 4, we're preparing to send personnel down the well."

The walkie-talkie also emitted the whining sound of a police dog.

Liu Jinghui, who had been silent all along, bent down and took out a map, propping it up on the ground.

"It's a ventilation shaft. 60 meters deep." Liu Jinghui breathed a sigh of relief and looked at Jiang Yuan with complicated emotions.