In just one week, three murders were discovered, and the deceased were all elderly people over 70 years old living alone. The murderer's method of committing the crime was to sneak attack with a rope from behind and cause the victim to suffocate to death.

Huang Zekai glanced at Qin Yuchen, and said softly, "It looks tricky, Captain Qin."

Qin Yuchen frowned and hummed.

Because the deceased were all elderly people who lived alone, most of them did not go out or socialize. It was very difficult to investigate their interpersonal relationship, and all the neighbors answered that they were unfamiliar or had never seen the victim.

In the first two cases discovered, the neighbors reported the deceased to the police only after the old man emitted a strong rancid smell. The time of death was already a month and half a month ago.

Huang Zekai's eyes swept across the pink sofa that Qin Yuchen had just inspected carefully, and asked, "Why did the murderer specifically choose the elderly?"

Qin Yuchen said in a deep voice: "Either the murderer has a stubborn heart towards the elderly, or... his strength is not enough to support him to kill a healthy adult."

Huang Zekai was startled, "Children? But now children aged sixteen or seventeen are all tall and big, and they should be able to compete with adults with weapons. If they are younger, if they are thirteen or fourteen years old, is too small, the elderly can easily resist."

Qin Yuchen was silent and didn't speak. After thinking for a while, he said, "We'd better wait for the results of Lao Zhang's autopsy before going back to the bureau."

"Protect the scene and don't let the onlookers break in."

All the police detectives around said in unison: "Yes, Captain Qin!"

While speaking, Qin Yuchen took out a small iron box from his pocket, and the fragrance of mint hit his face instantly.

With a click, several green mint hard candies were thrown into his mouth by Qin Yuchen.

Seeing this, Huang Zekai asked suspiciously: "Captain Qin, what are you eating? Have you quit smoking?"

Qin Yuchen put the tin box of mints back into his outer pocket expressionlessly, and said, "The smoke is too choking."

Huang Zekai was confused, and before he could continue asking, he saw the landlord anxiously asking: "Serial murder? Police officer, you must investigate carefully. Lao Yang usually looks like a very kind person.Whoever had a relationship, how could he suddenly die like this! What will happen to my house if something like this happens!"

Huang Zekai turned his head to comfort him, "Don't worry, we will find out the truth as soon as possible."

The landlord frowned fiercely while clutching his chest, and asked, "Officer, isn't the murderer still around this neighborhood? It's really scary."

Qin Yuchen walked to the window and looked down. The floor was very high and there was no external ladder.

Huang Zekai behind him said, "There are too many people outside, so it's inconvenient to record. Ma'am, if it's convenient, please come back to the police station with us and make a simple record."

——

The pale lights in the interrogation room were printed above the head, and the landlord said: "Yang Tonghai rented my house through the Federal Security Bureau half a year ago, and the people from the Security Bureau signed the contract for him during the whole process."

"I washed my hair in the morning and went to collect the rent. I knocked on the door for a long time and he didn't open it. I took out the spare key and opened the door. Who would have thought that I could see that scene."He was lying on the sofa with his face up, his eyes wide open..."

"Meet a dead person on the day of collecting money, bah, bah, bah." The landlord muttered with clasped hands, as if he was afraid of bumping into his fortune.

Huang Zekai behind the opposite table asked, "Yang Tonghai has no wife, son or daughter? Is he divorced or never married?"

The landlord waved his hand, "No, I have never been married, and I have no children."

Qin Yuchen tapped his fingers on the table, "Did Yang Tonghai tell you that?"

The landlord nodded and replied: "Yes, I don't know him very well. We just met in a hurry on the day we moved in. Lao Yang is a taciturn person and doesn't go out very much, but he paid the rent on time. It was because I was in the park onceI have seen him here, and I heard he said that he wants to find a nurse."

Qin Yuchen's gaze froze for an instant, Huang Zekai's pen paused, and asked: "What nurse, do you know it?"

The landlord hissed and thought for a while, then shook his head, "I don't know him, but Lao Yang has few connections, so where can he find a nurse?"

Qin Yuchen held the tin box in his pocket and gently rubbed it, and said in a hoarse voice for a while, "Thank you."

The landlord stood up when he heard the words, Huang Zekai smiled and said, "I'm sorry for your trouble, please feel free to contact us if you think of anything later."

The autopsy report came out shortly after the landlord left.

Forensic doctor Zhang Yang knocked on the door of the interrogation room, and said sideways: "Captain Qin, the cause of Yang Tonghai's death was indeed suffocation, that is, the strangle marks on his neck, and the Jomon marks are exactly the same as those in the previous two cases."

When Qin Yuchen heard the words, he immediately glanced at Huang Zekai and said, "Take the community where Yang Tonghai is located as the center, and immediately find out where the rope that can print that kind of pattern is sold."

Huang Zekai shouted solemnly: "Yes, Captain Qin."

Qin Yuchen asked again: "Old Zhang, when did you die?"

Zhang Yang: "It took more than a week to die."

Outside the corridor, Qian Guang suddenly ran over panting and said, "Captain Qin, Bureau Fan is looking for you."

Qin Yuchen's eyes sank when he heard this, "I'll go over right away."

In the spacious office, Fan Youde was pacing around the room wearing a coat, and on the desk were the photos of the three deceased and the autopsy report.

From left to right are 71-year-old Wu Jie, 76-year-old Zhou Yikang, and 70-year-old Yang Tonghai.

The men in the three photos are all victims of this elderly murder, and the time of death was one month ago, half a month ago, and one week ago.

Boom.

Fan Youde held the thermos cup and shouted, "Come in."

As soon as Qin Yuchen entered the room, he noticed the three photos on the table, but he pretended not to see them and asked, "Fan Ju, are you looking for me?"

Fan Youde's tired but energetic eyes swept across the handsome man in front of him, and asked bluntly, "What do you think about this case?"

Qin Yuchen's arm hanging by his side moved slightly, and before he could speak, Fan Youde said again: "The monitoring device you reported before is still at 7601."

Since Qin Yuchen concluded Ma Caiquan's smuggling and smuggling case, he didn't even have the chance to go back. He has been continuously investigating the serial murders of the elderly at the police station.

Qin Yuchen said in a deep voice, "It's still there."

Fan Youde was silent for a long time, and finally took out the thick stack of investigation documents from the drawer and handed it to Qin Yuchen.

He asked: "To be honest, are you also worried that this time the serial killer will still choose to commit suicide before being arrested by us?"

Qin Yuchen didn't speak.

Fan Youde leaned against the table and let out a deep breath, "I don't know how that person did it, but judging from the results alone, he should be judging criminals in his own way, allowing those vicious murderers to choose voluntarily.Suicide by brutal means."

"Ma Caiquan, Xiao Chun, Gao Wei in the smuggling case, Xu Xiu in the serial murder case, Zhao Baoxing in the rape..."

"They all died under their own judgment." Fan Youde frowned fiercely, and shouted forcefully: "But the federal code is not nothingness, he is challenging the law in his own name, and those people should receive a fair trial, die under the iron law, and not for any other reason!"

There was a long silence in the room.

Qin Yuchen took the thick document, and said in a hoarse voice, "Qin Yuchen, a first-level federal police officer, once again applied for access to the citizen's file numbered SW32991075638."

Fan Youde's emotions fluctuated, he looked directly at Qin Yuchen and said, "Find the murderer as soon as possible..."

Then Fan Youde paused for a long time, and after a while he said the instruction that made him laugh and cry: "Protect the criminal and don't let him commit suicide again."

Qin Yuchen's eyes were firm: "Yes."

Fan Youde supported his forehead and said in a low voice, "Approval of the file access application."

At the same time, the system's notification tone was ringing in Qiao Zhuo's ears: "The male protagonist Qin Yuchen's career growth value +2."

Qiao Zhuo walked into the apartment and took off his coat, and the lights in the living room suddenly turned on.

Qiao Zhuo was at ease, and said: "The male protagonist in this small world can improve his career growth by himself, and I feel that there is nothing wrong with me."

The system stopped, and hummed: "Deng Nan, an important character in the small world, is still in the Federal Hospital. Please don't take it lightly. At the same time, remind the host that the monitoring equipment of the male protagonist is still in operation, and remember not to destroy the villain's design."

Qiao Zhuo clicked his tongue and asked, "The monitoring device is still on? This time it's just for me, right?"

The system replied: "Yes."

Qin Yuchen was thoughtful and resolute, and almost a few minutes after Qiao Zhuo came home, there was a knock on the door.

Qiao Zhuo deliberately waited for a few seconds before walking over and opening the door.

I saw Qin Yuchen outside the door carrying a bag of things in his hand, exuding the aroma of food. The man had deep and handsome eyebrows, and with a smile on his face, he said, "Professor Qiao just came home? I made a potato and pumpkin soup.The portion is a bit too much, so I wanted to send it to you to have a taste."

The two of them were talking in friendly shells, Qiao Zhuo's sleeves were rolled up to the elbows and hung loosely, his whole person looked a little soft because of the home, a look Qin Yuchen had never seen before.

Qiao Zhuo folded his hands on his chest, raised his eyes and said indifferently: "Thank you Officer Qin, it just so happens that I haven't had dinner yet."

When Qin Yuchen heard the words, he immediately took an inch.

The man standing outside the door stepped into Qiao Zhuo's room as soon as he took the opportunity, and then pretended not to know when Qiao Zhuo squinted his eyes and his expression was clearly unkind, he held up his dinner and asked, "Qiao ZhuoProfessor, where do you put your dinner?"

"dining table."

When Qiao Zhuo turned around, Qin Yuchen had already opened the lunch box on the dining table, and the table was full.

Qin Yuchen leaned on the back of the chair and raised his eyebrows with a cool smile, and said, "Professor Qiao, I brought you here just after I finished, let's eat together?"

Qiao Zhuo stared at him indifferently and didn't speak.

But Qin Yuchen seemed to have made up his mind to stay in Qiao Zhuo's room tonight and find out something.

Qiao Zhuo could only walk over slowly and sit opposite Qin Yuchen.

Qin Yuchen's raised eyebrows were exceptionally handsome under the dim light. His gaze swept across the room's decoration without any concealment, and he noticed the all-black and white decoration, minimalist lines, and the whole room was so clean that it smelled like mint.It looks very cold and pale, exactly the same as Qiao Zhuo.

Qin Yuchen filled a bowl of soup with a spoon and handed it to Qiao Zhuo.

Suddenly, Qin Yuchen's communicator on the desktop sounded extremely abruptly, "The file number SW32991075638 has been downloaded, please check."

Qin Yuchen: "..."

Silence collapsed in the room, and no one spoke for a while.

Qiao Zhuo lowered his eyes and bit a piece of potato, said lightly: "It seems that Officer Qin is very interested in me."