Autopsy room.

Lu Chuan had already conducted a detailed skeleton identification analysis on Zhang Manyu’s remains.

The body had been buried underground for 15 years and had long since turned to bones.

According to the skeleton identification analysis, it was determined that the cause of Zhang Manyu’s death was suffocation.

Generally speaking, when a person is suffocated, there is often a violent struggle.

So, in such cases, most victims would have close contact with the perpetrator, and the process would be quite intense.

For instance, the victim’s epithelial tissue could be found under the fingernails.

However, due to the long time since Zhang Manyu’s death,

even if there were some clues or traces at the time of death, after 15 years, nothing would be left.

What Lu Chuan aimed to do this time was not to look for traditional evidence.

In all skeleton-related cases, after a long period of decomposition, only two things remain.

One is bones, and the other is hair.

In fact, compared to bones, hair has a longer preservation time.

Because hair contains sulfur-rich keratin, which makes it extremely resistant to decay.

Typically, hair buried underground can last for 50 to 100 years.

Since Zhang Manyu died 15 years ago, her hair should not have decayed.

But in reality, the hair on skeletons doesn’t appear the same as in movies.

During decomposition, the hair would detach from the body and not remain on the skull.

Lu Chuan now aimed to carefully analyze and identify the remaining hair after Zhang Manyu’s death.

If Zhang Manyu had had intense contact with someone back then, it’s likely there would be hair left on her from the other person.

Lu Chuan hoped to use this possibility to identify the perpetrator who killed Zhang Manyu.

Of course, this possibility exists but success is not guaranteed.

Lu Chuan just wanted to do his best and leave the rest to fate.

Whether he would succeed, no one knew.

Meanwhile.

Haizhou City Public Security Bureau office.

"From the clues we have so far, it is certain that Zhao Guojun is involved in assisting Zhao Xiaoguo’s escape."

"However, it’s still unclear if Zhao Guojun is related to Zhang Manyu’s death back then."

In fact, Qin Yong had speculations that Zhang Manyu’s death was likely connected to Zhao Guojun.

Qin Yong even speculated that the person calling him might aim to expose Zhao Guojun as the murderer of Zhang Manyu.

However, the caller does not have concrete evidence.

After all, 15 years have passed since that incident.

Yet, there was a lingering question: Who witnessed the murder when Zhang Manyu was killed back then?

Why had this witness never reported to the police?

Why wait until November 23rd, 15 years later, to call him about Zhang Manyu’s murder?

Song Jiangguo understood the severity of the situation and why Qin Yong had come.

"What is your Criminal Investigation Team’s opinion?"

"The evidence of Zhao Xiaoguo committing murder is solid, and the evidence of Zhao Guojun helping Zhao Xiaoguo evade police capture is also solid."

"Currently, Zhao Xiaoguo is in custody, and regarding Zhao Guojun... our suggestion is to take action."

Sheltering a criminal, knowing that Zhao Xiaoguo committed murder and still assisting in his escape—this is not a light charge.

Song Jiangguo thought for a moment and did not immediately respond to Qin Yong.

"I need to report this to my superiors."

"Go back and wait for my update."

Qin Yong understood Song Jiangguo’s perspective: "Okay, Director Song, I’ll wait for your message."

After Qin Yong left, Song Jiangguo rubbed his tired, numb face.

His relationship with Zhao Guojun was not ordinary.

They were once high school classmates. Though they attended different universities, after graduation, they both returned to Haizhou City to work.

Now, both hold high positions.

Over the years, they had frequent interactions.

But Song Jiangguo never expected Zhao Guojun to get entangled in such a case this time.

What to do?

Inform him?

Song Jiangguo shook his head.

Impossible.

Having reached the position of director of Haizhou City Public Security Bureau, Song Jiangguo often felt like he wasn’t his former self.

He knew too many secrets, too much confidential information, and how many people had sacrificed their lives for the safety of this city.

Just yesterday, the Anti-drug Detachment finally cracked a case they had been working on for eight years.

They obliterated a drug trafficking gang that had been entrenched around Haizhou City for a long time.

This case was successfully solved because the Anti-drug Detachment had placed an undercover agent 8 years ago.

When the undercover agent successfully completed the mission and returned yesterday, instead of going back to the detachment, he went straight to his daughter’s school to pick her up.

But when he saw his daughter, she just gave him a faint look and walked away quickly.

The undercover agent caught up and asked his daughter if she missed her dad.

He asked continuously three or four times, but his daughter remained silent.

It wasn’t until they got home that his daughter said, "Didn’t you tell me to pretend not to know you when in front of many people?"

At that moment, the undercover policeman broke down and cried.

And in Song Jiangguo’s hands, he held information about all similar staff in Haizhou City.

If he bent the law for personal gain, what would happen to those officers who left their homes and risked their lives for their duties?

Taking a deep breath,

Song Jiangguo put on his police hat and left the office.

In all of Haizhou City, a qualified public security director traditionally has no friends.

As Song Jiangguo sought approval, the investigation from the Criminal Investigation Team did not stop.

The interrogation of Zhao Xiaoguo continued.

This guy, besides the affair with Song Jinfu, had been involved in many other things.

With a powerful father, Zhao Xiaoguo had gotten away with many bad deeds.

And in order to survive and lessen his sentences, he even confessed to peeping on the housekeeper several times while she was bathing.

Back in the Criminal Investigation Team, Qin Yong received unexpected news.

"Song Jinfu’s wife?"

"Yes, she just called, saying she must see you; she has something to hand over directly to you."

After Song Jinfu was killed, it was only natural for his family to be notified, but Qin Yong didn’t understand why she wanted to meet him and hand him something personally.

"Where is she?"

"On her way, should be here soon."

"Okay, once she’s here, bring her directly to my office."

"By the way, how’s the interrogation with Zhao Xiaoguo going?"

"Pretty fruitful, Zhang Hui scared him a bit, and he confessed everything."

"Hurry up and get all the transcripts ready, and have him sign them this afternoon."

"Yes, sir!"

Back in the office, Qin Yong rubbed his slightly swollen temples.

Now, he was just waiting for orders from Song Jiangguo.

There shouldn’t be any major issues with Zhao Xiaoguo; with his biological son’s testimony, Zhao Guojun was in significant trouble this time.

But why did Song Jinfu’s family want to see him?

However, half an hour later, instead of seeing Song Jinfu’s family, Qin Yong received devastating news.

"They... were hit?"