Major Crimes Unit Starts with Police Academy Students

"Reading more books really does have its benefits. This top student really knows a lot; he figured it out in no time."

Mingcheng, you've really got some skills, kid. I'm completely impressed now."

Listening to the conversation between the two, Li Dawei whispered to Yang Shu beside him,

"Doctor, you're a top student too, have you thought this through?"

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Yang Shu shook his head at him, frowned, and continued to ponder the matter; he still couldn't quite understand.

But Li Dawei didn't forget to tease him,

"Hey, you're no different from us ordinary people, even though you're a PhD."

Yang Shu felt a deep sense of defeat at Li Dawei's blow; he, a law master's graduate from Beijing University, couldn't even understand this problem.

Yang Shu replied irritably.

"How many times have I told you, I'm not a PhD, I have a Master's degree."

Immediately, Wu Mingcheng grinned at Gao Chao, and the two exchanged a knowing smile.

Eager to know the answer, Wang Shouyi spoke directly.

What are you two talking about, speaking in riddles? Hurry up and tell me!

Gao Chao noticed that everyone was staring at him expectantly, and immediately said,

"Let Mingcheng, the person in question, say this himself. I won't steal his thunder."

So, everyone turned their attention back to Wu Mingcheng.

Wu Mingcheng then spoke up.

"Actually, it's nothing much. What everyone missed was a detail in the driver's statement: he used an oxygen cutter when he cut the safe."

Suddenly, everyone realized what was going on.

"Oxygen cutters can generate high temperatures that directly burn diamonds,"

"Yes, how come we didn't think of that?"

"Forget it. If Mingcheng hadn't told you, how would you have guessed?"

............................................................

Immediately, everyone looked at Wu Mingcheng with admiration and gave him a thumbs up.

They all overlooked such a small detail, except for Wu Mingcheng, who noticed it.

The leaders of several police stations were also lavish in their praise.

Wang Shouyi couldn't help but say,

"If it weren't for Mingcheng, we really would have been at a loss,"

Cheng Hao chimed in from the side.

"Yes, Chief, who would have thought of such a tricky angle for solving a case?"

Ye Wei, the instructor who had been listening attentively without speaking during the discussion, also said...

"Mingcheng is amazing! He's on par with the veteran officers in the Criminal Investigation Division!"

At this moment, everyone spontaneously applauded Wu Mingcheng's brilliant crime-solving process.

Xia Jie, standing to the side, looked at Wu Mingcheng in the center of the crowd, feeling extremely proud and honored.

Then, Wu Mingcheng suggested,

"Director, just to be on the safe side, I think it would be best to have this packet of powder tested to verify its authenticity."

Wang Shouyi immediately said...

"Okay, send it for testing right away."

Chapter 375 Turned to Ashes

As expected, the test results were exactly as Wu Mingcheng had guessed: the powder was the product of the diamond burning.

Once verified, the facts of the case become clear, and it can basically be closed.

However, they couldn't help but observe three minutes of silence for Wang Shi, the owner of the pawnshop; this outcome was likely a huge blow to him.

Then, Wu Mingcheng and his group reappeared in the interrogation room, where Wang Shi was sitting opposite them.

Wu Mingcheng looked at Wang Shi and said,

"Mr. Wang, our investigation confirms that you were not lying; the sixty-carat diamond was indeed in the safe."

Wang Shi showed no surprise whatsoever upon hearing this.

"Of course, how could I lie? But if you don't find that diamond, I won't leave. I'll stay at your police station until it's found."

Upon hearing Wang Shi's words, Wu Mingcheng paid no attention, instead tossing a transparent evidence bag filled with powder onto the table.

He said,

"Here, this is your diamond,"

When Li Dawei saw the bag of powder, he almost couldn't help but laugh.

Wang Shi was stunned by Wu Mingcheng's words, completely unable to follow Wu Mingcheng's train of thought.

He thought to himself, "Are all police stations this arrogant these days?"

Do you really think the victim is insane? You think you can fool me with a bag of cheap powder?

This time, Wang Shi was truly enraged. He narrowed his eyes and slammed his hand heavily on the table.

“Officer, do you think I’m easy to fool? I’m not crazy yet. Don’t try to play such a low-level joke on me.”

Wu Mingcheng wasn't angry at this point. Anyone would find it unbelievable to see their six billion dollar diamond turned into a bag of powder.

He asked Wang Shi directly.

"Mr. Wang, I'd like to ask you, how much do you know specifically about diamonds?"

Wang Shi tilted his head to the side at this moment.

"This is what I do, what do you think? Anyway, I make more than you,"

At this moment, Chen Xincheng and the other two shook their heads. Wu Mingcheng slowly spoke,

"Diamonds are extremely rare and valuable, making them highly sought after by people and coveted by thieves."

Besides color, clarity, and carat, diamonds also have many other important characteristics.

Another very important factor affecting its value is its machining or cutting.

The world's largest gem-quality diamond is the Cullinan Diamond, known as the "Star of Black States".

It weighed 3106 carats and was later cut into more than 100 precious diamonds of varying sizes.

I suppose the one in your pawn shop is one of the stars of the Black State?

Upon hearing this, Wang Shi was extremely surprised, his mouth gaping wider and wider. After a few seconds of stunned silence, he wondered to himself, "How did the police know this? Could it be that this diamond came from an illegitimate source?"

He said,

"That's right, the diamond that went missing from my pawnshop is indeed one of them."

But what does that have to do with the packet of powder you have in your hand?

Wu Mingcheng shook his head helplessly, stood up, and brought the packet of powder to Wang Shi.

"Mr. Wang, this is all the driver's fault. He didn't know the properties of diamonds; it was a complete waste."

Then he asked,

Do you know the physical properties of diamonds?

Wang Shi seemed a little confused, shook his head, and said...

"I don't know."

Wu Mingcheng then sat back down in his seat and began to speak.

Diamonds are the hardest known material in nature, and they are often used to make diamond drill bits for cutting other materials.

Diamonds are extremely brittle and easily break upon impact.

Hearing Wu Mingcheng's words, Wang Shi was still somewhat confused, understanding only vaguely.

"But after all you've said, I still don't understand why you said this packet of powder is my diamond?"

Wu Mingcheng smiled and then directly stated the reason for the incident.

"Because the main component of diamonds is carbon, and the temperature range in air is 850~1000°C. Above this temperature, diamonds will burn and turn into gas. Mr. Wang, do you understand now?"

Upon hearing this, Wang Shi, who was sitting in the chair, was completely stunned. "You mean...you mean...my sixty-carat diamond was burned to ashes?"

How could this be? Haha, this is impossible, impossible, impossible!

Wang Shi was nearly scared to death at this point; this was the first time he had ever heard such a claim.

Wu Mingcheng thought Wang Shi still didn't understand, so he continued to explain.