Since Yinxiang's love interest was him, Qin naturally didn't oppose it.

Cheng Yinxiang and Lu Qingrong's relationship was noticed by both sets of parents. Seeing them together, they knew what was happening.

Though not officially announced, everyone present knew what was going on. It wouldn't be long before they had a wedding.

Before Qin could finish being happy, her phone rang. It was Kun. Qin asked, "Captain Kun, why are you calling at this hour?"

"Qin Qin, I'm calling to invite you to the police station."

Kun said apologetically, "I actually want you to help with a case. This case is difficult and unique. I hope you can help."

Qin got up and went to the balcony, "Is something happening?"

"Some things," Kun said. "There's a series of cases that have been ongoing for five months. This is the sixth month. Can you come to the police station? I'll explain it in detail."

Qin nodded, "Sure, I'll go right now. But I can't guarantee I'll be able to help. If I can, I'll do my best. If not, please don't blame me."

Kun said, "Of course, having you here is enough."

After informing her family, Qin went to the police station. Lu Qingrong, not wanting a girl to go alone, drove her there. Upon arriving, she saw many people inside, all busy. Qin felt they worked hard, especially during the New Year when no one should be working.

Kun smiled and said, "Qin, come quick, follow me inside."

Qin couldn't help but ask, "Captain, why don't you take a break during the New Year?"

Kun smiled, "We were supposed to take a break, but the human trafficking case was just solved, and there are still many things to do. We'll hold a press conference later. This isn't a small matter; we need to give the public an explanation, but we'll wait until they are sentenced before making it public."

Qin joked, "Please don't mention me."

Kun also joked, "No way, if we say a young girl solved the case, people will criticize us to death. Some believe in these things, but others don't. If we announce it, it will cause chaos."

Nowadays, animals aren't allowed to become spirits, and such fantastical things only happen on TV. In real life, they wouldn't dare promote these ideas publicly.

Qin understood these were jokes. However, realistically, such cases couldn't be exposed to the public in any country. The impact would be too significant. Of course, it wouldn't be like in novels where the person would be dissected. This was almost impossible. People with such special abilities would likely be protected by the state and serve the nation, provided they weren't traitors.

Kun wanted Qin to help with a current ongoing case. The suspect was likely male. Before solving the case, any male could be a suspect. This case was significant, so Kun took it seriously and wouldn't involve Lu Qingrong.

Lu Qingrong nodded, understanding, and waited in the front.

Many policemen looked at Lu Qingrong, not out of interest in him but in curiosity about the young woman with him. This case had been circulating in the police station, and the way it was solved was too easy. They had never solved a case so simply. Usually, tracking down such large-scale human trafficking gangs took months. This time, it was done in a day. They naturally knew something was off.

As police officers, they understood such situations. Kun couldn't keep it hidden and told them, warning them not to scare the young girl. A young policeman brought water to Lu Qingrong and asked about Qin's situation. It was their first encounter with such a gifted person, so it was natural to be curious.

"Uncle, is the girl following Captain Kun your daughter? Having such a talented daughter is truly a blessing," the young policeman asked curiously.

Lu Qingrong remained silent, not revealing any information about Qin.

Following Kun into his office, Kun took out a stack of case files and laid them out in front of Qin, "This is the latest case that occurred over the past few months. All victims are female, and the attacks happen every twenty-fifth of the month..."

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Kun looked slightly embarrassed and glanced at Qin, "Before the attack, each victim was sexually assaulted, and the method was very familiar. They were killed with a single cut to the throat, showing great skill. Unless one is very familiar with human anatomy, no clues were left behind..."

As Kun explained, Qin understood the case. Qin wasn't bothered by Kun's embarrassment. To her, it was just about the case, the victims, and the perpetrator. She didn't pay attention to other details.

The case wasn't fully reported due to its sensitive nature. All incidents occurred in Liangping City, starting with the first case in September. The media only reported one victim being sexually assaulted and murdered, advising citizens to be cautious. The exact location was in Liangping City, but no further details were disclosed. This led to controversy online, with some blaming the victims, suggesting they deserved it for wearing revealing clothes or being out late. Most of these comments came from perverted men, while women opposed these views. Eventually, forum moderators closed these threads to give the deceased some peace.

In October, November, December, and January, one female victim was sexually assaulted and killed each month on the twenty-fifth. The bodies showed signs of sexual assault and a single cut to the throat, with blood and clothing neatly arranged. The wounds were even stitched, and the bodies were disposed of randomly in secluded areas, making it impossible to trace any leads. Furthermore, the bodies were cleaned, leaving no traces at the crime scene, making it difficult to find the primary crime location.

Given the victims were all females, attacked on the twenty-fifth of each month, killed with a cut to the throat, and cleaned up, the police concluded this was a serial murder case.

The killer was very calm, intelligent, and twisted, showing great skill in cleaning up the crime scenes and leaving no traces. Solving such a case indicated extreme intelligence and coldness.

February 17th was the New Year, and today was the second day of the New Year, February 19th. With only six days left until the next attack, if the pattern continued, another victim would likely occur this month.

Qin carefully reviewed the case. All victims were young, ranging from sixteen to twenty-six years old, all virgins, and attractive. The records showed they had never dated, were honest, and thus vulnerable to scams. These girls ranged from students to white-collar workers, with no apparent connection.

Kun said, "Initially, we focused on the twenty-fifth as a clue, thinking it was the killer's birthday. We checked birthdays on the twenty-fifth, but there were too many, making it impossible to narrow down. The twenty-fifth couldn't be used as a clue. This case had no leads, making it extremely difficult. For five months, we made no progress. As the twenty-fifth approached, we had no leads. After solving the human trafficking case, I didn't dare rest and started investigating this case. Finally, I had no choice but to ask you for help."

Qin nodded, "Honestly, the killer is very skilled. Looking at these case files, there's no useful information. There are no leads, and the killer's methods are unique. The bodies were handled specially, with no fingerprints left. By the way, what about the bodies?"

Kun said, "Honestly, the bodies have been cremated. Initially, we wanted to preserve them for evidence, but the families didn't want the deceased to be disturbed. We inspected the bodies multiple times, and the autopsy results were consistent. Whether cremated or not, it made no difference."

Without the bodies, Qin couldn't help but chuckle. Her Heavenly Eye ability wasn't fake. The Heavenly Eye was powerful, and with enough cultivation, supernatural abilities were no problem. However, her cultivation wasn't high enough, limiting the power of her Heavenly Eye.

Her Heavenly Eye ability was limited. Without the bodies, she couldn't imagine the connection between the bodies and the killer. There needed to be a link point, like with Zizi Yu's case. At least his parents' bodies were still in the world, providing a connection. Using her Heavenly Eye forcefully, she might have seen something.

Now, without the bodies and with them cremated, the last connection to the world was severed. To put it bluntly, using terms from metaphysics, humans have yin and yang aspects. The body is yang, and the soul is yin, forming a person. When a person dies, the soul usually stays in the world for seven days. Even if the soul is unwilling, it will go to the underworld after seven days, leaving only the body in the world.

Of course, there were some special cases.

Some people die with such great resentment that they become earthbound spirits, commonly known as encountering ghosts. Because of the great resentment, they refuse to leave the place of death and thus become earthbound spirits. However, the situation is different now. These deceased died very peacefully, so it's impossible for them to become earthbound spirits. Moreover, earthbound spirits are only bound to the first crime scene, but the police find the second scenes.

If the corpse remains in the mortal world, it will be the last trace proving your connection to the world between heaven and earth. But if there is no trace left, you will completely disappear from the world, and nothing will remain. Nothing will remain, not even the ability to see through the heavenly eye.

The reason Ji Ziyu can see his parents' situation is simply because their bodies still exist in this world, leaving clues behind.

But now, even the corpses have been cremated. How can one see anything? The spirits reside in the netherworld, and ordinary people are not allowed to enter the netherworld without permission. If discovered, the punishment is severe. After entering the netherworld, the spirits quickly enter the six paths of reincarnation, leaving no trace even in the netherworld. How can one investigate?

The scenes on TV where mediums can call back deceased spirits to the mortal world are all fake. Once a spirit enters the netherworld, it is extremely difficult to return to the mortal world.

However, there are indeed mediums who can go to the netherworld and call back spirits. But Gu Qin does not possess this ability. She is a orthodox practitioner of Taoism. Going to the netherworld with her current cultivation level would be like climbing to the sky, and she might instead be devoured by yin energy.

Gu Qin can indeed use divination to obtain some information, but it has its limitations. For example, she can calculate the approximate location or other details of the perpetrator, but using it to solve the case is quite difficult. She took out three coins and planned to perform a divination. Finally, she concluded that the perpetrator was a man around thirty years old.

Gu Qin then calculated whether there would be another murder case this month, which showed yes. When she further divined the victim's identity, she concluded that it was a student, and the specific location of the murder was in the north.

Gu Qin found this strange, but she could only tell Huang Kun, "I'm sorry, since there are no corpses left, it is difficult for me to see the perpetrator's condition. I can only tell you that the perpetrator is likely a man around thirty years old. There will also be a murder case this month, and the specific location is in the north. It's hard to get more detailed information."

Huang Kun said, "Actually, there is something odd. During autopsy, none of the victims had any traces of sedatives or drugs in their bodies, yet they died very peacefully without any struggle. This is quite strange. Generally, no matter if someone is asleep or awake, having their throat sl*t would cause a violent reaction because it takes about a minute before one dies, and during that time, they would definitely struggle. But these corpses did not show any signs of struggle."

"Then the perpetrator's method was very skilled, and the cuts were made with medical-grade blades. We suspected it might be a doctor or someone who had studied medicine. We investigated in this direction. In Daishan, there were a few doctors who had birthdays on the 25th. After careful investigation, two of them were professors, and during the incident, they both had classes. There were a few younger ones, aged between twenty to forty, but they had alibis, mostly being in surgery or at the hospital. So we ruled them out. Up until now, we haven't found any useful leads."

Huang Kun couldn't help but sigh, "Apart from all the victims being virgins, there are no other clues. Their ages and birthdays vary, and we don't know what purpose or criteria the perpetrator used to choose the victims."

Gu Qin was flipping through the victims' files, laying five sets of data on the table. She included their discovery postures, birth dates, and so on. After looking at them for a while, she suddenly exclaimed, "Something's off!"

Huang Kun perked up, "Student Gu, did you find something?"