You went on a blind date and presented an A-level wanted criminal as a meeting gift?

As night falls, the hustle and bustle of Beijing is shut out outside the red walls of the courtyard houses.

The atmosphere in the study was somewhat somber.

Jiang Tingxue sat at the large rosewood desk, carefully flipping through the yellowed diary.

Su Qingge and Su Ke'er stood on either side of her, their brows furrowed tightly.

"What exactly does it say here?"

Su Ke'er craned her neck to look for a while, then felt a headache coming on. "It's all Latin names for various bones, and some kind of analysis of muscle tissue thickness... It's too hard to understand."

Su Qingge sighed as well: "I just looked at it carefully, and it does indeed contain some routine forensic autopsy notes. Wen Zhonghai is right, there is no clue about the killer's identity, not even the case analysis of those cases from back then."

Jiang Tingxue's tears fell onto the table, soaking the edges of the paper.

She closed her diary in despair and covered her face with her hands.

"Is it really useless? The thing my dad risked his life to protect back then, is it just an ordinary notebook?"

Just then, the study door was pushed open.

Lin Chen walked in carrying two steaming cups of milk.

He placed the milk on the table, reached out and gently ruffled Jiang Tingxue's hair.

"Don't rush."

The diary had been in Wen Zhonghai's possession for fifteen years; if it contained any clear clues, it would have been destroyed long ago.

But Lin Chen also firmly believed that Jiang's father, as a top forensic doctor back then, would never hand over a meaningless piece of paper when he realized that his life was in danger.

"Honey, what should we do now?" Jiang Tingxue looked up, her red and swollen eyes filled with helplessness.

"Wen Zhonghai said there were no clues because he could only see the surface."

Lin Chen walked to the desk and laid the diary flat on the table again.

He instantly activated [God-level Chemistry Mastery] and [God-level Insight].

"The real secrets are often hidden in places that cannot be seen."

Lin Chen turned around and walked to the bookshelf, turning off the overhead light in the study.

The entire room was suddenly plunged into darkness, with only the retro desk lamp on the desk emitting a faint yellow light.

The three women were stunned, wondering what Lin Chen was going to do.

Lin Chen then pulled a small black spray bottle out of his pocket.

This was the multi-functional developing spray he had used at the crime scene during the day. However, after returning to the courtyard house, he used his god-like chemical knowledge to add a few drops of specially prepared fluorescent neutralizer to it.

Lin Chen took a spray bottle and sprayed a fine mist of water evenly over the gaps between the seemingly blank pages in the diary.

A faint smell of medical alcohol filled the air.

Wait about ten seconds to allow the water mist to fully penetrate into the paper fibers.

Then, Lin Chen took out a high-frequency ultraviolet flashlight from the drawer.

A soft "snap" sound.

The flashlight was turned on, and a beam of pale blue ultraviolet light shone on the pages of the diary.

A miracle happened at that moment!

Under ultraviolet light, dense fluorescent green characters slowly emerged from the originally blank paper fibers!

These characters are extremely small, densely packed among the normal black ink characters, and are completely invisible to the naked eye without the aid of special chemicals and ultraviolet light.

"Oh my god!"

Su Ke'er covered her mouth and let out a gasp.

Su Qingge's eyes widened, her face filled with disbelief.

Jiang Tingxue stared intently at the green characters that appeared, her whole body trembling violently.

"This...this is a forensic code created by my father!"

Jiang Tingxue's voice trembled with excitement, "He taught me before that you can write with a special alkaloid extract, and once it dries, it becomes completely invisible. You can only see it with a specific developing agent!"

Lin Chen put away the flashlight and turned up the light of the table lamp.

"Look at what's written on it."

Jiang Tingxue took a deep breath, forced herself to calm down, and began to quickly decipher the complex codes.

The study was so quiet that only her rapid breathing could be heard.

A few minutes later, Jiang Tingxue raised her head, her eyes filled with extreme shock and anger.

"My dad wrote in his diary that he found a tiny cut in the scapulae of the third corpse."

Jiang Tingxue pointed to a section of glowing text and said through gritted teeth, "The angle of that cut is extremely strange, completely violating the normal anatomical force application habits. After repeated deductions, my father confirmed that the murderer used a rare 'left-hand reverse grip' dissection technique when removing the victim's bones!"

"Left-hand reverse grip?" Su Qingge frowned. "Is there anything special about this swordsmanship?"

"Very special."

Jiang Tingxue clenched her fist, her nails digging deep into her palm. "This kind of swordsmanship requires extremely high wrist strength, and only naturally left-handed people can master it. Back then, the entire medical community in the capital had very few experts in this swordsmanship..."

She didn't finish her sentence, but the answer was already obvious.

Lin Chen sneered and picked up where she left off.

"Only one person knows how, and that is your highly respected Principal Wen Zhonghai."

Lin Chen noticed during their handshake in the office that although Wen Zhonghai shook hands with him using his right hand, the pen and teacup on his desk were all placed on his left side.

He is a hidden left-hander.

Everything fits together.

Wen Zhonghai is the psychopathic killer who has been hiding for fifteen years!

Jiang Tingxue slumped back in her chair, tears silently streaming down her face.

The elder she had respected for fifteen years, the benefactor who sponsored her schooling, turned out to be the real murderer of her father.

The pain of such a collapse of faith is something that ordinary people simply cannot comprehend.

Lin Chen walked to her side, hugged her tightly, and gently patted her back.

"Don't cry. Now that we've found him, your husband will definitely make him pay the price."

Lin Chen's eyes became extremely sharp in the dim light, like a beast that had locked onto its prey.

Wen Zhonghai thought himself clever and kept the most dangerous evidence with him for fifteen years.

But he never dreamed that Jiang's father was guarding against him!

"Lin Chen, let's go catch him now!" Su Qingge had a fiery temper and immediately pulled out her phone to call for backup.

"no."

Lin Chen held Su Qingge's hand down. "This diary can only prove that Wen Zhonghai knows this kind of knife technique. Legally, this is called circumstantial evidence and cannot form a complete chain of evidence."

Given Wen Zhonghai's status and connections in the medical field, he has countless ways to escape punishment if he is forcibly arrested.

Not only would it fail to convict him, but it would also alert him, causing him to completely destroy all evidence of his crimes.

"What can we do? Are we just going to watch him get away with it?" Su Qingge asked anxiously.

Lin Chen stared at the diary on the table, which was gleaming with a faint light, his tone icy cold.

"The best way to deal with this kind of pervert who calls himself an artist is to destroy his pride and force him to show his true colors."