When he heard that he couldn't get detailed information about the perpetrator, he felt somewhat disappointed. Although he already knew from Gu Qin's words that her methods required seeing the person or the body, he still hoped for something more when she started flipping coins.

But the results were too vague, and without detailed information, they couldn't identify the perpetrator. Huang Kun thought, in a vast world, the perpetrator wouldn't have 'perpetrator' written on their face. Just when they were about to give up, they wondered if Gu Qin needed to see the sixth victim to identify the perpetrator. He didn't want another victim, but if that was the only way, he had no choice. Now hearing Gu Qin's doubt, he felt a glimmer of hope.

Gu Qin didn't say anything but carefully examined the victims' birth dates. After calculating, her expression gradually turned serious. She then studied the victims' photos closely, spending over ten minutes doing so.

Huang Kun dared not interrupt her, knowing she must have seen something. Did she find the perpetrator?

After more than ten minutes, Gu Qin said solemnly, "This perpetrator is beyond your reach. They are not an ordinary person, but someone like me, someone skilled in the occult. But unlike me, they use the occult for harm. Have you heard of the Five Arts of Divination? The occult includes many things, not just fortune-telling and feng shui. It also involves medicine and cultivation. Some occult practitioners learn orthodox cultivation, while others use other methods to rapidly increase their cultivation. When I first entered, I only saw the case's progression. It wasn't until I looked at these victims' birth dates that I realized something was off. Though their ages and birth dates differ, I noticed that their birth times were all in the yin hours."

Huang Kun was stunned. This meant the case was not committed by an ordinary person but by someone with cultivation. Although he didn't fully understand what cultivation meant, he had a vague idea from TV shows that people with cultivation had abilities akin to immortals.

He didn't have time to ask about this now, only focusing on the case. He asked urgently, "Student Gu, is it really someone with cultivation?"

Gu Qin nodded, "Very likely. Ask me, were the victims killed around noon, around twelve o'clock?"

The victims were found at the second scene, and the estimated time of death was between ten in the morning and one in the afternoon. If her guess was correct, the victims were killed precisely at noon.

Huang Kun nodded, "Yes, thinking about it, each victim's death time seems to be around noon."

"That's right. At noon, yin and yang energies alternate, and this is the moment when yin energy is strongest. It's the most yin time of the day." Gu Qin sat down next to him and carefully reviewed the victims' photos. Then she picked up a pen and paper and wrote down several hours, handing the paper to Huang Kun. "Call the families of the five victims and ask if they were born during these hours. If they were born during these hours and their birth dates match, their birth dates should be very yin."

Huang Kun, for the first time dealing with such matters, felt his hair stand on end. He didn't say much and took the note from Gu Qin, then called the families of the victims based on the names and specific hours.

Since he had been handling the case, the families knew his number. When he called, they answered immediately. He called the family of the first victim, the daughter of September, whose death had struck the family hard. Over the phone, the family sounded excited, "Captain Huang, is there any progress?"

Huang Kun replied solemnly, "Sorry, we don't have any progress yet, but we'll keep working on it..." Before he could finish, the caller was already crying, "It's been almost half a year, and there's still no progress? How do you police handle cases? We cooperated fully, answering all your questions, and now it's been half a year..."

Huang Kun sighed internally, "Madam, please don't worry. Actually, there are some clues. I'm calling to ask if your daughter was born at midnight."

The caller finally stopped crying, "Captain, why are you asking this? My child was indeed born at that time. She cried loudly when she was born..."

Thinking of her daughter's usual gentle demeanor, she began to cry again. She asked if there were any clues. Huang Kun couldn't reveal anything and told her they had some leads and would continue investigating, then hung up.

Gu Qin sympathetically glanced at him. Being a policeman was tough; she wondered why so many people online criticized the police, government, and military. Except for the poor, everyone else was criticized.

Huang Kun called the families of the other four victims, and sure enough, they matched Gu Qin's calculations. After hanging up, Gu Qin said, "Since everything matches, these birth dates combined with the time of death suggest very yin birth charts. Almost certainly, this case was not committed by an ordinary person. As for why the 25th was chosen, I suspect it might be related to the perpetrator's personal time concept or chosen randomly. The date may not have any special significance."

"As for why there were no sedatives or drugs detected in their bodies, the reason is simpler. Someone with cultivation can induce deep unconsciousness without any drugs. Also, look at their faces. They are too calm, and when something is out of the ordinary, there's always something strange. No matter how you look at it, the faces of other victims would never be like theirs."

Huang Kun checked, and indeed, there was something wrong. Their expressions were too calm, unlike those of other victims. He felt even more uneasy. He had encountered many murder cases, but this one was different. Even reviewing the case scared him.

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Huang Kun was at a loss. If the perpetrator was not an ordinary person, how could they solve the case? Should he tell his superiors that the perpetrator was not an ordinary person? But superiors only cared about solving the case, regardless of whether the perpetrator was ordinary or not.

Gu Qin stood up and looked at him, "Captain Huang, I'm sorry, I can't help much. With so many women born in the yin hours in Daishan, it's unfeasible. I can only guess that it was done by someone with cultivation, possibly for some form of cultivation, but I'm not sure. According to the divination, there will be another case this month..."

Huang Kun couldn't help but sigh, "I know. Then... If another case occurs, can you recognize the perpetrator?"

Gu Qin paused and nodded, "Yes, if something happens, call me immediately. I'll go to the scene. By the way, tell me the locations where the five victims were found. We should try something, perhaps the sixth victim can be spared."

Huang Kun said, "Let's go together."

Gu Qin nodded, and they left the office. Lu Qingrong was sitting outside drinking tea. Seeing Gu Qin, he stood up, assuming they were going back.

Gu Qin said, "Uncle Lu, Huang Captain and I have some things to discuss. Why don't you go home? Your daughter rarely comes back, so you should spend more time with her. Don't worry about me; I'll be fine."

Huang Kun added, "I need to take Gu Student out to investigate the case. Don't worry, I'll protect her and take her home later."

Gu Qin smiled, "I don't need protection, just don't protect me."

Lu Qingrong saw that his niece was capable and that he wouldn't be of much help. Plus, the case was sensitive and needed confidentiality. Huang Kun probably wanted to avoid him, so he didn't insist and left after reminding Gu Qin.

Gu Qin went with Huang Kun to the initial discovery site of the victims. They started with the first victim, found at a recycling station. A sanitation worker found the body early in the morning, thinking the woman was drunk. Upon turning her over, the worker found her stiff and pale, scaring him badly and prompting him to call the police.

The recycling station was in a remote area, far from the city center, with some greenery around. The nearest residential area was a bit of a walk away.

Gu Qin opened her third eye and saw nothing unusual, no earthbound spirits either. The soul had long dispersed.

They checked the other four sites, with similar results. Gu Qin couldn't help but sigh. Now, she was truly helpless. She couldn't check every young woman; there were at least a million unmarried women in Liangping City, making it impossible. Besides, her current cultivation level couldn't handle frequent use of her third eye.

Back at the police station, it was noon. Huang Kun invited Gu Qin to eat, along with a young officer who had a girlfriend trouble last New Year. The young officer was following Huang Kun's lead.

During the meal, they didn't discuss the case, but the atmosphere was low. After eating, Huang Kun sent Gu Qin home and returned to the station to work on the case. The human trafficking case was almost wrapped up, waiting for the children to be rescued before releasing a press statement. Due to the serial r*p* and murder case, all colleagues had to work overtime. The higher-ups valued the case, and if another case occurred, it might not be kept secret. Already, some posts on forums had been noticed, but they were deleted quickly. If another case happened, the public would surely notice.

The young officer named Shi Shaojun brought Huang Kun tea, noticing the case files on his desk. He asked, "Captain, can even Gu Student not solve this case?"

Huang Kun nodded and shook his head, "Not exactly. This girl identified something unique about the case. The case is peculiar. Without seeing the bodies, we can't identify the perpetrator. But she predicted a sixth case this month in northern Liangping City. We need more clues unless the sixth victim appears, then she might know who the perpetrator is."

Shi Shaojun said, "Captain, does that mean we need another victim to solve it? Is there no other way?"

"There is no other way," Huang Kun sighed. "If there were, she wouldn't have given up. And she said the perpetrator is someone with cultivation."

Shi Shaojun was stunned. He was young and read novels often, knowing that cultivation meant supernatural abilities. Was this possible in real life?

Shi Shaojun asked, "Captain, what should we do now? Report to superiors?"

Huang Kun shook his head, "No, reporting won't help. We'd just get scolded. Superiors don't care if the perpetrator is ordinary or not. We have to investigate regardless."

Of course, they had to continue investigating even if the perpetrator was a celestial being.

But they had no evidence. How could they investigate without evidence?

The police were troubled, and so was Gu Qin. This feeling of helplessness was not pleasant. Knowing innocent lives would be lost soon but being unable to do anything was frustrating. Her cultivation was limited, and her third eye was simple.

Back at Cheng's house, Gu Qin was in a bad mood. Sitting on the sofa, everyone was there. Cheng Chuchu and Cheng Yueguang were playing on their phones, while Gu Jia was busy studying in her room. The TV was on quietly, not to disturb her.

Soon, Cheng Chuchu's phone rang. She looked at the caller ID and laughed, then answered. Her phone was slightly broken, and the sound was loud. A young girl's voice came through, "Chuchu, check the Liangping City forum. There's a post saying there's a serial killer case. Five victims in five months! Scary stuff. The poster says the post will be deleted soon, so hurry and check it."

Cheng Chuchu's eyes sparkled, "Okay, I'll check it out first."

This girl was likely Cheng Chuchu's friend. After hanging up, Cheng Chuchu logged into the local forum and found the post mentioned by her friend. It was prominent, with many replies, so it was easy to find. The title was "Be Careful, Ladies, Serial Killer Case in Liangping City—Five Victims."

Young people loved such posts, especially those about local incidents. It sparked discussion.

Clicking into the post, it described a series of murders starting in September in Liangping City. All victims were female virgins, sexually assaulted, sl*t throats, and disposed of with meticulous care. Each murder happened on the 25th of the month, with the bodies found the next day. Cheng Chuchu was shocked by the terrifying details and the numerous replies, some claiming to be relatives of the victims, confirming the truth.

Saying that he was a relative of a police officer, this case was a major one for the bureau. The bureau didn't take a holiday even during the New Year, all because of this case. And it was said that there would be a special broadcast reporting a major solved case soon, finally bringing some positive energy.

There were several informants, so the matter should be true. Seeing his sister's pale face, Cheng Yueguang couldn't help but say, "If you're scared, just don't watch. It's okay to look at it, but don't take it too seriously."

Cheng Chuchu shook her head and passed the post to her brother and Gu Qin, saying, "You guys take a look. I feel this post is true. There really was a female r*p*-murder case in September, and she was indeed killed on the 25th."

Gu Qin didn't need to look to know it was true; she had just come from the police station, and the police definitely didn't want the case to spread. She remained silent for a moment before glancing at Cheng Chuchu, feeling relieved when she saw nothing wrong with her.

The victim of this case wasn't born on an extremely yin day, only an ordinary yin hour. An extremely yin birth occurs on an extremely yin year, month, day, and hour. Such women generally have poor health and are prone to encountering evil spirits. If someone truly wanted to use yin energy to supplement yang energy, then a woman born on such an extremely yin day would be the best choice.

Gu Qin couldn't calm down at this moment and went back to her room to divinate and think of other methods. Her master had taught her orthodox Taoism and sorcery, but not any heterodox methods. Otherwise, if she knew some, she might have found a way to identify the killer.

Outside, Cheng Chuchu and Cheng Yueguang were already discussing whether the case was real. Unexpectedly, within a few minutes, the post had been deleted. Chuchu said, "See? It must have been removed by someone from the relevant department. This thing must be real; otherwise, why delete it? Isn't that like trying to cover up the truth?"

Cheng Yueguang actually also suspected the case was true, but he was afraid his sister would be scared, so he tried to comfort her. Finally, seeing she didn't believe him, he couldn't help but say, "Then be careful. Don't go out for a few days."

Cheng Chuchu sighed, "But I promised to go play with Xiang Jinyu tomorrow. What should I do?"

Cheng Yueguang knew that Xiang Jinyu was the girl who had called his sister earlier, so he said, "I'll take you there tomorrow. Anyway, it's only the 21st today, not the 25th yet. Be careful, I'll take you."

Just as they were talking, Cheng Chuchu's phone rang—it was Xiang Jinyu calling, "Chuchu, did you see the post? It's so scary. What if the police don't catch the person, will Liangping City be dangerous in the future? Will we ever let girls go out alone again?"

Cheng Chuchu smiled, "Don't worry, it will definitely be solved. You know, these serial murder cases always get attention from higher-ups. Don't worry, maybe it'll be solved in a couple of days."

Xiang Jinyu had a similar personality to Cheng Chuchu. They chatted for a while, and their mood improved. Neither of them took the matter too seriously since it hadn't happened to them.