CHAPTER 316: CHAPTER 199: THE LAST KILOMETER

Upon hearing this, Mr. Zhang grinned.

"Looks like we old comrades are falling behind. We don’t know much about these new public security technologies."

At this moment, Mr. He also had a smile on his face.

With Jiang An’s method, he felt the pressure on him had eased considerably.

Otherwise, blindly searching for bloodstains on a sandy area would indeed be too difficult!

An hour later, the group returned once more to the front of Building 1 in the development zone.

Mr. Zhang raised the caution tape and went inside.

The six individuals arrived at the sandy patch on the first floor.

Jiang An surveyed his surroundings and noted the strong light from the stairwell window.

However, using Blue Heart Reagent to reveal bloodstains requires a dark environment.

He then turned and said, "Mr. He, please find a shade cloth and block out this window."

"Shade cloth? For what?"

Mr. He looked surprised.

"The conditions for Blue Heart Reagent to show require darkness."

Mr. He checked the surroundings.

He said somewhat helplessly, "Brother Jiang An, I need to go back and find one; it might take a while."

Just as he was turning around, Wan said, "No need, Mr. He. Use my black t-shirt."

"Use a shirt?"

"Use a shirt?"

Instantly, everyone nearby was dumbfounded.

He quickly took off his black shirt, walked to the window, and hung it up.

The next moment, the entire room’s light dimmed.

Zhang Yean immediately gave a thumbs-up. "Brother Wan, your level is so high, I want to learn from you!"

Mr. Zhang also said, "I didn’t expect Jiangcheng’s detectives to have such a strong spirit of dedication!"

Mr. He also laughed and gave a thumbs-up, "Jiangcheng’s criminal investigation is a model for the whole province!"

Upon hearing so much praise, Wan’s face instantly showed a proud expression.

"Thank you for the recognition!"

"Thank you for the recognition!"

Then Jiang An took a white sprayer from his toolbox, which was already equipped with Blue Heart Reagent.

After preparing everything, he turned back and said, "Mr. Zhang, can we start now?"

"We can!"

Zhang Feng nodded affirmatively.

Jiang An held the sprayer in one hand and a strong flashlight in the other.

"Puff puff puff..."

Soon, Jiang An sprayed Blue Heart Reagent onto the sandy ground.

At this moment, Zhang Feng and Mr. He stood nearby.

They were both intrigued by this miraculous potion. Was there truly such a magical chemical reagent?

Two minutes later, he completed the first part of the spraying.

"Is this all it takes?"

Mr. He asked curiously.

Jiang An nodded, "Next is the moment to witness a miracle!"

Ten minutes later, sure enough, there was a faint blue fluorescence on the sand at the corner of the wall.

Instantly, everyone cheered with joy.

Especially Zhang Yean, who excitedly said, "I see it! I see it!"

Mr. Zhang and Mr. He were both incredulous.

In front of everyone’s eyes, it looked like fireflies.

Mr. He patted Jiang An’s shoulder.

"Your potion is truly amazing!"

Jiang An smiled, put on gloves, and walked over to place that small handful of sand into a glass container.

Mr. He took the glass container and said softly, "It’s truly invaluable!"

"You must hold it steady!"

Mr. Zhang also said with a smile.

He looked down at the sandy ground, clicking his tongue.

"It’s truly not easy!"

"To precisely find that spot in such a large area of sand is no easy task!"

Wan walked over, looked at it, and asked in a deep voice, "Do we need to test each grain of sand in this cup?"

Jiang An shook his head and said, "No need!"

"I think we can simply pour a little purified water into the glass container to shake and filter."

"Blood dissolves in water, and we can just test the filtered water!"

Hearing this, everyone was quite inspired.

It seemed like everyone saw hope for solving the case.

Mr. Zhang raised his hand and patted Jiang An’s shoulder.

"Brother Jiang An, thank you."

"I didn’t expect you to not only bring us thoughts on solving the case this time but also new technological techniques."

"On behalf of the criminal investigation team, I thank you again."

Mr. He also said with a smile, "Mr. Zhang, I think once this case is solved, Jiang An must be credited and awarded."

Mr. Zhang immediately gave a thumbs-up, "It’s a must."

"With such a significant contribution to the case, he must be the top credit."

Then Mr. Zhang said, "Not only that, but we also need to send a thank-you letter and commendation to Jiangcheng City Bureau!"

"Jiangcheng Police Team is full of talent; it must be specially commended."

Hearing this, Wan also laughed and said, "Haha! Guess Mr. Li will smile in his dreams from now on."

Mr. Zhang turned to look at Jiang An and said, "Whenever we have difficult cases, we’ll still invite you to join the serious case team to guide us in solving them."

Upon hearing this, Jiang An smiled.

"Mr. Zhang, thank you for the recognition."

"My abilities are limited; I still need further learning."

Zhang Feng laughed and said, "Too much modesty can be arrogance!"

On the way back to the city bureau from the development zone, they raced along.

Mr. Zhang personally delivered the glass container to the evidence-testing laboratory.

"This evidence is crucial; it cannot go wrong at any stage!"

"Moreover, the blood on the sand is very minimal; it must be successfully tested at once!"

"Yes!"

"We will be extremely careful!"

Then Mr. Zhang turned and said, "Brother Jiang An, let’s rest in the conference room while waiting for the test result."

Two hours later, Mr. Zhang’s phone rang.

Zhang Feng glanced at it and smiled, "The results are out!"

Instantly, the entire conference room fell silent, and everyone’s gaze was fixed on the phone on the table.

"Mr. Zhang, it’s Liu from the evidence testing laboratory."

"From the sand samples you sent earlier, there are blood components, belonging to a female’s genes."

Mr. Zhang asked, "Is it the blood of the victim, Li Lan?"

"Report, Mr. Zhang, I’ve compared, and it’s not from the victim Li Lan, but another woman’s blood."

Upon hearing this, Zhang Feng immediately turned to look at Mr. He.

"Understood."

"I’ll send over the blood of the suspect, Zhang Yan, right away."

"Alright, we’re waiting for your good news."

Shortly.

Mr. He jogged to the ground floor interrogation room.

At this moment.

Zhang Yan sat in the interrogation chair, looking relaxed.

Upon seeing the interrogation room door open, Zhang Yan glanced up.

"What?"

"Are you letting me out?"

Mr. He glanced at her, "Wishful thinking!"

"Extend your hand; I need to collect your blood."

Mr. He then took out a fine needle.

"What does this mean?"

"We’re extracting your blood to see if it matches the gene of the blood at the scene."

Upon hearing about the scene blood, Zhang Yean instinctively clenched her hand.

Observing her state, Mr. He was almost certain Zhang Yan was the perpetrator.

"What’s the matter?"

"Are you scared?"

Mr. He then sternly said, "I advise you to be honest."

"If you don’t cooperate, I’ll have to forcibly prick you for blood."

After a long time, she slowly stretched out her hand.

Mr. He took the blood collection needle, pricking her little finger’s skin.

When a drop of blood appeared, Mr. He immediately transferred it to the filter paper.

Once this was done, Mr. He said gravely, "It’s too late to say anything now."

"Because we don’t need your testimony; we can purely use this objective evidence to bring you to court."

Instantly, Zhang Yan slumped into the chair.

Her face was ashen, her eyes vacant.

She didn’t even have the strength to argue anymore.

Even though she said nothing, everything was already said.