A perfect crime? To me, it's full of flaws!

That afternoon, the trace evidence laboratory was brightly lit, and an urgent fingerprint comparison report was delivered to the task force command center.

The perpetrator was identified through fingerprint database comparison.

Male perpetrator: Ren Yongshou, 45 years old, a local resident of City A.

Female perpetrator: Liu Juan, 42 years old, a local resident of City A.

The two are husband and wife.

The identities of the two deceased in the house have also been confirmed.

Male deceased: Deng Yang, former vice president of the Women and Children's Hospital of City A.

The deceased woman was his wife, Xu Yuzhu.

Along with the report came DNA comparison results from hair and skin flakes extracted from the scene, as well as analysis of trace evidence extracted from the steel nails used to kill Xu Yuzhu and the hemp ropes used to bind Deng Yang.

All the evidence forms a complete and unbreakable chain of evidence, pointing firmly to Ren Yongshou and Liu Juan.

It can be said that even without any confession, these two people would be sent to the execution ground.

However, the criminal investigation team is facing an unprecedented predicament.

A massive manhunt was quickly launched in City A, with all surveillance cameras, traffic checkpoints, and hotel registration systems in the city under surveillance.

But the couple seemed to have vanished into thin air.

There were no surveillance cameras that captured them, no traffic records, and no evidence of their spending.

They were like two drops of water, silently merging into the vast ocean of City A, a city of tens of millions of people.

Fan Liang was under immense pressure.

Three days.

For three whole days, Qi Feng practically slept on a cot in the trace evidence laboratory.

He only returned to the hotel twice: once to watch the policewoman sent by Director Wang feed Lin Haitang porridge, and once to change her fever-reducing patch.

Each stay lasts no more than fifteen minutes; a quick shower, a change of clothes, and then a hurried return to the front lines.

Lin Haitang's fever had subsided, but she remained listless.

Everyone in the task force was like a string stretched to its limit.

Qi Feng was no exception.

That afternoon, when the final physical evidence test report was signed and filed, Qi Feng was finally able to leave the laboratory.

He dragged his leaden legs to the task force command center on the top floor of the criminal investigation detachment, hoping to see if there was anything he could do to help.

Pushing open the door, Qi Feng walked straight to the captain's office at the very back.

He knocked on the door and then pushed it open to enter.

"Captain Fan, even a man of iron needs to close his eyes. If you keep going like this, you'll collapse before we catch the guy."

Behind his desk, Fan Liang was munching on a cold loaf of bread while drinking a cup of dark, thick tea.

His eyes were bloodshot, his eye sockets were sunken, and his beard was unkempt, making him look as if he had aged ten years in an instant.

"I just dozed off for two hours on the cot, it's alright." Fan Liang's voice was hoarse, like sandpaper scraping, clearly from days of staying up late and excessive smoking. "My throat's ruined."

"How's the situation now?" Qi Feng pulled up a chair and sat down. He had been buried in the laboratory for the past few days and knew very little about the progress of the pursuit outside.

"See for yourself." Fan Liang didn't say much, but simply raised his chin to indicate the mountain of documents on the table, then leaned back wearily in his chair and closed his eyes.

Qi Feng didn't stand on ceremony any longer, picked up the top file, and began to look through it.

From the background information of the suspects, Ren Yongshou and his wife, to the investigation into the social relationships between the victim and the lawyer, and all the investigation reports from the past three days...

There's too much information, and it's too disorganized.

Qi Feng read very quickly, but it still took him more than four hours to sort out all the core information.

He put down the last document, rubbed his throbbing temples, and his gaze fell once again on an old file about Ren Yongshou's daughter's death at the Women and Children's Hospital.

"Captain Fan," Qi Feng's voice broke the silence in the office, "I saw in this document that the heart of that baby was donated to another child after his death. How did that happen?"

Fan Liang, who had been resting with his eyes closed, suddenly opened them. He stretched out his rough hands and patted his face hard, forcing himself to perk up.

"That's right," Fan Liang said in a hoarse voice. "According to the recollections of some of the hospital's veteran staff members, Ren Yongshou's son had a congenital heart defect, which had been repaired through surgery. However, the child did not survive. Because his heart was intact, it was transplanted to another baby boy with heart disease who was also in the hospital at the time."

Qi Feng's pupils contracted slightly: "Is it possible...?"

"We've thought of that," Fan Liang interrupted him directly, clearly having considered this issue countless times. "The child who received the heart and his family are still in City A. Our people are on duty 24/7 in three shifts, keeping watch outside the residential area where they live. But there's been absolutely no movement."

Qi Feng's brows furrowed tightly.

This is the most troublesome part.

"Logically speaking, all those directly involved in the death of his son have already been murdered by those two in the most brutal way. From the doctors and nurses at the hospital to the lawyers later on, their revenge has been taken." Qi Feng's voice turned low. "If they still have a target for revenge, then there is only... that one."

The family that gained a "new life" because of the death of their son.

This inference is too dark, and too crazy.

"Yeah," Fan Liang sighed, tossing the half-eaten bread into the trash can and lighting a cigarette. "So I sent two teams to keep an eye on them. But this is just a temporary measure. What if those two never make a move? We can't just stand there forever, can we?"

A profound sense of powerlessness enveloped the entire command center.

Just as the two were speechless and the atmosphere became extremely tense,

"Bang!"

The office door was suddenly flung open from the outside. A young detective, who had even forgotten to knock, was flushed and panting heavily from running, but his eyes gleamed with barely suppressed excitement.

"Captain... Captain! We have a new lead!"