Solving the case: Combining the police dog's olfactory genes at the beginning

Do you have Li Lin's DNA sample?

"There should be a record after the car accident. I'll check it right away."

While waiting for the results, Luo Fei re-examined the timeline.

“The days when Li Ya was on night shift happened to be the time when several reports of crimes were concentrated.”

Chen Xuanran flipped through the records.

"And she always volunteered to be in charge of patrolling those areas."

The computer beeped, and Cheng Yunchuan looked up.

"The results are in, and the DNA from the fingernail matches Li Lin's file sample very closely."

The office fell into dead silence.

"But that's impossible."

Chen Xuanran's voice trembled.

"Li Lin has been dead for five years."

Luo Fei said slowly.

"Unless... Li Ya's personality split is so complete that it causes biological changes in her body."

"Li Ya's other personality is very likely her sister Li Lin."

Luo Fei stood in front of the whiteboard, his fingers tapping on the case analysis diagram filled with clues.

Only he and Chen Xuanran remained in the office. The night outside the window was deep, and the lights in the police station corridor cast dappled shadows on the glass.

Chen Xuanran frowned.

"You mean, Li Ya developed a second personality because of her sister's death? That's ridiculous!"

"No, that's entirely possible."

Luo Fei turned around, his eyes gleaming with an unusual light.

"After Li Lin died in the car accident, Li Ya, due to excessive grief and psychological trauma, subconsciously refused to accept this fact. In order to protect herself, her brain created a personality of 'Li Lin'."

Chen Xuanran shook his head, his fingers tapping the table unconsciously.

"Even so, how do you explain those toys? Li Ya's payment records using her phone are crystal clear, how could she not remember?"

Luo Fei's expression froze for a moment, then he raised his hand to rub his temples.

“I haven’t figured that out yet. But I’m almost certain that Li Ya’s new personality is the murderer, and also the woman who saved Zhang Weiwei.”

He walked to the window, looked at the dark night sky outside, and recalled what Li Ya had once said.

"Remember? Li Ya said she had to be asleep before 10 o'clock and never woke up in the middle of the night."

Luo Fei turned around, a glint of light flashing in his eyes.

"But in reality, when she woke up at night, her body had been taken over by the new personality. The original personality had no memory of this, which is why she insisted that the child was lying."

Chen Xuanran pursed his lips.

"It's all speculation. Where's the evidence?"

Luo Fei did not answer immediately; his super memory was recalling all the fragments related to Li Ya.

Suddenly, his eyes lit up.

"Wait a minute. When Li Ya was working overtime and staying up late, her personality didn't change. This means the new personality doesn't appear every night, but randomly!"

"so what?"

Chen Xuanran shrugged.

"The court will not accept such speculation."

A mysterious smile appeared on Luo Fei's lips.

“We can use hypnosis to prove it.”

His gaze passed over Chen Xuanran, as if piercing through the wall, and landed on Li Ya in the interrogation room.

Luo Fei had basically confirmed the truth in his mind. That's why he couldn't see the sin value above Li Ya's head.

During the day, Li Ya is the cheerful police colleague, but the "Li Lin" personality who operates at night is the real murderer.

"The system determines guilt based on character."

Luo Fei muttered to himself.

"Li Ya, as a police officer, did not break the law, so I cannot see the words. But her new personality..."

Chen Xuanran interrupted his thoughts.

"Hey, what are you talking to yourself about again?"

Luo Fei snapped out of his daze.

“It’s nothing. I’ve read about dissociative identity disorder, and hypnosis can awaken multiple personalities. I’ve decided to give it a try.”

That afternoon, Luo Fei was alone in his office, operating the system interface that only he could see.

He needs 1000 sin points to exchange for the "Super Hypnosis" skill, and he is currently 300 points short.

"Looks like we need to arrest a few criminals first."

Luo Fei murmured.

What happened next shocked everyone in the second team.

Luo Fei seemed to have suddenly gained some kind of precognitive ability, leading them to capture three major criminals who had been on the run for many years: a bank robber, a serial thief, and a fugitive murderer.

"Captain Luo, what's wrong with you all of a sudden?"

Officer Zhang stared wide-eyed at the prisoner being escorted into the police car.

Luo Fei just smiled mysteriously.

"Just luck."

When the system showed that his sin value had reached 1020 points, Luo Fei did not hesitate to exchange for the "Super Hypnosis" skill.

A strange heat surged into his eyes. He blinked and felt his vision become sharper.

At 9:45 p.m., Luo Fei kept Li Ya in the office under the pretext of working overtime.

He noticed that Li Ya had started to yawn, and her eyelids were getting heavy.

"Li Ya, could you take another look at this case file for me?"

Luo Fei handed over a document.

Li Ya rubbed her eyes.

"Captain Luo, I'm a little sleepy. Could we do it tomorrow?"

Luo Fei seized the opportunity and looked directly into her eyes.

“Look into my eyes, Li Ya.”

His pupils held an eerie blue light, and Li Ya's gaze immediately became unfocused.

Luo Fei's voice was deep and magnetic.

"Relax. You are safe and relaxed."

Li Ya's eyelids slowly drooped, and her body relaxed.

Luo Fei continued to guide him.

You are in a very comfortable place now. It's very quiet around you.

In less than three minutes, Li Ya had completely entered a hypnotic state.

Luo Fei knew the crucial moment had arrived.

"Li Lin."

He whispered the name in Li Ya's ear.

Li Ya's body trembled violently, and her eyes suddenly opened.

But at this moment, her eyes were completely different—sharper and colder.

Luo Fei immediately activated "Genius Eye," and sure enough, at this moment, a blood-red number was clearly displayed above Li Ya's—no, Li Lin's—head.

1870.

"Li Lin."

Luo Fei said calmly.

"I know it is you."

"Li Lin" looked around, her expression quickly shifting from confusion to vigilance.

"Where is this? Who are you?"

"I am Luo Fei, Li Ya's colleague."

Luo Fei maintained a safe distance.

"He was also the police officer in charge of Zheng Hao's murder case."

Upon hearing Zheng Hao's name.

"Li Lin's" eyes showed panic, but she quickly regained her composure.

"I do not know what you're talking about."

Luo Fei cut straight to the point.

"I know you're the murderer. The murder weapon is hidden in the drain of your laundry sink, isn't it?"

Li Lin's face turned pale instantly, and she subconsciously took a step back.

"How could you?"

"I also know that Jiang Xia didn't kill anyone."

Luo Fei pressed closer and closer.

“He only helped you clean up the scene. He was almost entirely uninvolved in killing Zheng Hao.” “Li Lin’s” breathing became rapid.

"Impossible, you couldn't possibly know that."

Luo Fei sneered.

"Jiang Xia picked you up in his car on the night of the incident. You went to an abandoned factory in the east of the city."

This sentence completely shattered Li Lin's psychological defenses.

She stared at Luo Fei in shock.

"You...you already..."

"Yes, I've been suspicious of you for a long time."

Luo Fei's voice softened.

"Li Lin, I know why you wanted to kill Zheng Hao."

Luo Fei sat in the chair in the interrogation room, his fingers tapping lightly on the table, but his gaze never left the woman opposite him.

She looked to be around thirty years old, with long, flowing hair and a pretty face, but her eyes revealed an indescribable weariness and vicissitude.

"Ms. Li Lin, could you elaborate on your relationship with Li Ya?"

Luo Fei tried his best to make his voice sound calm.

The woman opposite her, Li Lin, raised her head, a bitter smile tugging at the corners of her lips.

“I told you, I am Li Ya’s older sister, even though we look the same age.”

"twin?"

Yes, identical twins.

Li Lin's fingers unconsciously twisted together.

“I was born three minutes earlier than her, and those three minutes determined that our life trajectories were completely different.”

Luo Fei noticed the pain that flashed in her eyes when she said this, and he opened the file in front of him.

"According to our investigation, Li Ya does have a twin sister named Li Lin, but she died in a car accident fifteen years ago."

"Dead, isn't he?"

Li Lin suddenly interrupted him, her voice trembling.

"Yes, that's the official record. But in that car accident, only my body died."

Luo Fei frowned.

"What do you mean?"

Li Lin seemed to have made up her mind.

"Officer, what I'm about to say might make you think I'm crazy, but please listen patiently."

She began to recount the afternoon that changed everything.

Fifteen years ago, seventeen-year-old Li Lin and Li Ya were on their way home from school when an out-of-control truck suddenly rushed towards them.

In the nick of time, Li Lin instinctively pushed her sister away, but was herself thrown into the air.

"I remember that feeling clearly."

Li Lin's voice became ethereal.

"The pain of my body being torn apart, and then suddenly I felt relieved. I was floating in the air, looking down at my own corpse and Li Ya's crying out."

Luo Fei's finger stopped on the notebook. He looked up at Li Lin, trying to find traces of lying on her face, but only saw deep pain.

"and then?"

He heard himself ask.

"Then I felt a powerful suction force."

Li Lin unconsciously hugged her shoulders.

“When I ‘woke up’ again, I found myself in a dark place, like a deep well. I could see the outside world, but only through Li Ya’s eyes.”

Luo Fei put down his pen and placed his hands on the table, crossed over each other.

"You mean, your soul entered your sister's body?"

"It sounds ridiculous, doesn't it?"

Li Lin smiled wryly.

"But that's what happened to me. I was trapped in that 'deep well,' watching Li Ya grow up, go to college, work, and fall in love. I couldn't do anything but watch."

The interrogation room light cast shadows on Li Lin's face. Luo Fei noticed that her eyes became unusually empty when she recounted this experience, as if she had truly returned to that "deep well".

How long did this situation last?

Luo Fei asked.

"ten years."

Li Lin's voice was so soft it was almost inaudible.

"For ten whole years, I was an observer. Until that night five years ago."

Her voice suddenly became lively, and her eyes shone with light.

"That night, Li Ya and Jiang Xia, her husband, had a fight, and she cried very sadly. I don't know why, but I suddenly felt a force, and then I 'woke up'."

"Awake?"

"Yes, I found myself in control of my body."

Li Lin's hands trembled slightly.

"Can you imagine that feeling? For the first time in ten years, I was able to control my movements and speak. I ran to the mirror and saw Li Ya's face, but it was definitely me in control."

Luo Fei felt a chill creep up his spine. He had seen countless bizarre cases, but he had never heard a story like this before.

Reason told him it was impossible, but the details and emotions Li Lin conveyed were too real.

"Jiang Xia, did he notice?"

A gentle smile appeared on Li Lin's lips.

“He noticed it immediately. Jiang Xia is very perceptive. He said my eyes had changed and my behavior was different. At first, he thought Li Ya was just having emotional fluctuations, but he quickly realized that the body inside him was not his wife.”

"He accepted this fact?"

"It took some time."

Li Lin looked down at her hands.

"But Jiang Xia is a very special person. He was willing to listen to my explanations and try to understand. Slowly, we..."

Her voice lowered, but Luo Fei already understood what she meant.

"You two are in love."

He stated.

Li Lin nodded, tears welling in her eyes.

“I know this is wrong. It’s his wife’s body, but I can’t control my feelings. Jiang Xia is the same. He said he doesn’t love Li Ya’s appearance, but her soul. Me.”

A brief silence fell over the interrogation room.

Luo Fei pondered this bizarre story, trying to find the logical flaws in it, but Li Lin's narration was surprisingly coherent.

"What about the child?"

he asked suddenly.

"According to the information, Li Ya and Jiang Xia have a son."

Li Lin's expression became complicated.

“That was the most difficult part. Li Ya gave birth to the child, but after he was born, I took care of him most of the time. I bought him toys, coaxed him to sleep, and taught him to talk. In his eyes, I am his mother.”

Her voice choked.

“Sometimes I wonder if this is stealing Li Ya’s life? But when I hold that child in my arms and feel his dependence and love, I can’t let go.”

Luo Fei noticed that she used the phrase "most of the time".

"Li Ya... does she still exist?"

Li Lin's body visibly stiffened for a moment.

“Sometimes, she comes back. Like a sudden switch, I return to that deep well and watch her take control of the body. But this happens less and less often, almost never in the last two years.”

Luo Fei keenly noticed the change in her tone.

"You think she... disappeared?"

"I have no idea!"

Li Lin suddenly became agitated and gripped the edge of the table with both hands.

“I really don’t know! Sometimes I wish she would never come back so I could continue with my life; other times I’m afraid she’s dead, then wouldn’t I be a murderer?”

Rainwater meandered down the glass windows of the interrogation room, like countless transparent snakes twisting and crawling.

Li Lin's fingertips tapped lightly on the metal tabletop, the rhythm miraculously matching the sound of raindrops outside the window.

"Officer Luo, do you know what the most painful thing about having a split personality is?"

She suddenly spoke, her voice so soft it was almost drowned out by the sound of the rain.

"It is to be fully aware of one's own crimes, yet be unable to control them."

Luo Fei pushed the notebook aside and placed his hands on the table, crossed over his shoulder.

The cold light of the interrogation room cast sharp shadows on his angular face.

"Li Lin, or should I call you Li Ya?"

"Call me Li Lin."

She looked up, a bitter smile playing on her lips. (End of Chapter)