Chapter 376: Tracking the Unsolved Case 1

"I...I understand. Thank you, Professor Li! I need to go back and digest this!"

The boy saluted hastily as if he had been pardoned, turned around and walked away quickly, his back looking a little embarrassed.

Xia Lili raised her head, her small nose wrinkled slightly, and she smiled slyly, "Captain Li is so enthusiastic today, going out of his way to answer questions for us."

She blinked, her tone teasing playfully, "But isn't your pressure a bit too strong? I think that junior brother is sweating profusely."

Li Qihan calmly put away Xia Lili's things, his voice as steady as ever: "My teaching style has always been like this."

Xia Lili was about to tease him a few more times, but he naturally took her hand and held her fingertips in his palm.

"Let's go." He shook his phone, and on the screen was a message from Xia's father, "Mom and Dad asked how long it would take us to get home."

The setting sun cast a warm golden hue on the training ground.

Li Qihan walked slowly hand in hand with Xia Lili. She was drinking mineral water with her head tilted back, and a few strands of hair were blown by the wind and stuck to her cheeks.

He stopped and carefully helped her tighten the bottle cap, then gently tucked the loose hair on her temples behind her ears.

Xia Lili tilted her head and smiled at him, her eyes curved into crescents.

His cold and hard outline softened in the sunset, and when he looked down at her, even his eyes were warm.

The shadows of the two people holding hands stretched out long in the afterglow.

One is as calm as the deep current in the still sea, the other is as bright as the warm spring sun, they are a perfect match together.

A week later, Yangcheng Police Station.

In the office, Li Qihan and Xia Lili were working side by side to sort out the files of the "Black Gold Maze" series of cases.

Zhang Nuo, an important member of this transnational criminal organization, was extradited from Country M a year ago, and the "Black Gold Maze" where Xia Lili had infiltrated undercover was also destroyed in a joint operation with the Los Angeles police.

With these breakthroughs, the Longguo police are gradually clearing out the organization's remaining forces in the country.

At this time, Professor Qiao Ying, an expert in note identification, appeared at the door.

Li Qihan immediately stood up: "Teacher, why are you here?"

Xia Lili also stepped forward with concern: "Professor Qiao, how is your recovery after the operation?"

Professor Qiao smiled heartily, full of energy: "Don't worry, girl! Thanks to you for protecting the surgeon in time a year and a half ago, my surgery was successfully completed."

He patted his chest and said, "I have recovered very well now. I feel that I can still work healthily for the motherland for another 30 years!"

Professor Qiao excitedly raised the file bag in his hand, his fingertips trembling slightly. "Qi Han, do you still remember the handwritten invitation letter that the police found among your parents' belongings twenty years ago... after they were killed in the yacht explosion?"

Li Qihan's expression instantly became solemn, and his back unconsciously straightened: "I will never forget it."

It was a letter inviting his parents to Yangcheng Bay Yacht to discuss cooperation, and it also became the fuse that ignited a turning point in his life.

Li Qihan's Adam's apple rolled: "Teacher, have you made any new discoveries?"

Professor Qiao took a deep breath and solemnly placed the file bag on the table. "I have carefully reviewed the files of this 'Black Gold Maze' series of cases."

He pushed his reading glasses, his gaze as sharp as ever. "For the past twenty years, I've pondered the handwriting on that invitation letter. It's etched into my mind. Forty years of experience in handwriting analysis tells me there's no mistake."

Professor Qiao pulled out a copy of the account book confiscated from the criminal den and placed his finger heavily on the signature:

"This is the secret account book that was seized from the Dark Night Bar during the investigation of the Black Gold Labyrinth's hideout in Dragon Country."

"This signature is from the same person as the invitation letter from that year!"

Professor Qiao's voice was hoarse with excitement:

"Qi Han, the real murderer who killed your parents... is likely inextricably linked to the 'Black Gold Labyrinth'."

Upon hearing this, Xia Lili immediately looked at Li Qihan beside her with concern.

Li Qihan's eyes glared, his aura instantly becoming sharp and focused. "We'll immediately retrieve handwriting samples from the Dark Night Bar's account books for all those involved in the case and compare them to the invitation letter!"

"Let's get to work!"

Professor Qiao stood up with great determination. When he turned to look at Xia Lili, his eyes regained the kindness that only an elder could have. "Xiao Li, how is your little apprentice doing now?"

Xia Lili scratched her head embarrassedly.

It was when she went to the hospital to visit Professor Qiao under the pretext of "learning handwriting identification from Captain Li" that she found the opportunity to predict the risks of the operation through eye contact.

She answered honestly, "I still have a lot to learn. When it comes to handwriting identification, I'm at best an entry-level expert. I can probably help out."

Professor Qiao nodded approvingly: "Don't worry, as long as you are willing to learn."

The three of them said no more and quickly sat down in front of the desk, spreading out the thick files and samples.

They each put on white gloves, Professor Qiao skillfully adjusted the professional comparison light, and Li Qihan imported the scanned electronic samples into the identification system.

Xia Lili was responsible for arranging the suspect's handwriting samples and the yellowed copy of the invitation letter side by side according to their numbers.

The only sounds in the air were the rustling of flipping papers and the slight hum of the comparison lamp.

A handwriting identification related to the truth of a twenty-year-old unsolved case quietly unfolded in this focused and solemn atmosphere.

The lights in the appraisal room were brightly lit. Professor Qiao and Li Qiuhan were concentrating on comparing handwriting, while Xia Lili sat quietly beside them, studying seriously.

The desk is covered with various handwriting samples, magnifying glasses, measuring rulers and other professional tools, and the air is filled with the unique smell of paper and ink.

Professor Qiao sometimes put on his reading glasses to look carefully, and sometimes picked up a professional magnifying glass to observe the rise, development, turning point and ending of the strokes.

Li Qihan stared intently at the handwriting analysis software on the computer screen, adjusting the parameters from time to time for feature comparison.

Xia Lili silently observed the two bosses' operations, sometimes helping to deliver information, and sometimes recording and comparing key points.

After a whole day of intense work, the shoulders of the three were sore and their eyes were bloodshot from long periods of concentration.

At this moment, Li Qihan suddenly straightened up, his voice trembling slightly with excitement:

"Professor Qiao, please come and take a look at the signature of this suspect named Chen Wen!"

"The stroke characteristics, spacing between characters, and the upward curve at the end of the stroke are all highly similar to the handwriting in the Dark Night Bar's account book!"

Professor Qiao immediately put down the magnifying glass in his hand and walked quickly to Li Qihan.

Xia Lili was shocked and immediately gathered around.

Li Qihan has been tracking the case for twenty years. Can he really find the key clues this time and bring the real murderer of his parents to justice?

This thought made everyone present's heart rise to their throat.

Professor Qiao put on special gloves, took the sample and compared it carefully.