Cemetery in the western suburbs of R City.

On an early autumn afternoon, the sun is warm and warm, and in summer, holding white chrysanthemums to commemorate the deceased, walking slowly on the brick and stone road.

Although he didn't want to disturb someone's peace on this special day, the case was urgent, and the crazy murderer could come out again at any time, and he felt tormented in his heart if he waited for a second.

In the distance, he saw the long-lost figure standing quietly in front of his friend's tombstone, as if he was still immersed in some complex emotions and could not extricate himself. After a few months of not seeing, the man's body had lost some weight and his hair had grown a little, but this did not make Xia Shi feel the slightest strangeness and distance. On the contrary, as soon as he saw the back of that person, his long-anxious heart calmed down a lot.

He took a deep breath and quickened his pace towards the tombstone. Before he could get closer, he turned around vigilantly, looked at him curiously for a moment, and teased him with a gentle smile: "Yo, isn't this the newly appointed Xia Detachment Leader, what kind of wind blew you here?" ”

"I can't get through to your phone, guess you're in this place." Xia Shi took a few steps forward, offered flowers to the tombstone of the deceased, and then said apologetically, "Gu Song, I know I shouldn't come here to disturb you at this time, but the situation is urgent, and I need your help." ”

"What? I heard you right. Gu Song pretended to be surprised and raised his eyebrows, deliberately sarcastically Xia Shi said, "I can't imagine that Xia Gongzi, who has always been arrogant, will also take the initiative to beg me on this day." What I said before, when you become a leader, you can't solve the case, it's not the same......"

"Gu Song, I'm not in the mood to joke with you right now!" Xia Shi interrupted Gu Song's ridicule angrily, frowned, and asked straight to the point, "Have you heard of the "9.16 case"? ”

"I saw it on the news, what's the matter, hasn't the murderer been arrested yet?"

"It's not just that you haven't been caught." Xia Shi gritted his teeth in resentment and said, "Just last night, that murderer killed another person in the same way. While we haven't delved into the connection between the two victims, it's quite possible that we've met a psychopathic serial killer this time. ”

"So what?" Gu Song knew the purpose of Xia Shi coming to him, but he still couldn't help asking, "What do you want me to do?" I'm not a police officer anymore. ”

"It doesn't matter if it's a police officer or not, I just want you to help me this time, as an advisor."

"Is it really just this time?"

"Yes, just this once. After that, whatever you like, I will never interfere with your freedom. ”

"You let me think about it......" Gu Song folded his arms thoughtfully, looking a little undecided. The reason why he left the police force is also very helpless, as a former partner and friend of life and death, Xia Shi knows better than anyone why he would give up the profession of criminal police that he loved most in his life. He didn't want to return to his teammates and contribute a meager strength, but the current situation of his family ......

Seeing Gu Song's hesitant attitude, Xia Shi's heart was very anxious. Without waiting for Gu Song to make a decision, he hurriedly said, "I know what you're worried about. So, when you go back to the police force to help, I will help you hire the best nurses and nannies to stay with your wife 24 hours a day, and I will bear all the expenses, is that okay? ”

"No way!" Gu Song categorically refused, because taking care of that girl was a responsibility that he could not shirk all his life, and he couldn't always accept the other party's help just because the family had money in Xia Shi. Although Xia Shi never cared about these things, and helped him solve his financial difficulties more than once, in the final analysis, this is the life he chooses, no matter how helpless and difficult it is, he must persevere alone.

Xia Shi didn't want to embarrass Gu Song, so he took a step back and said, "Okay, since you don't accept this proposal, just treat the money as if I lent it to you, and you can just return it to me with interest in the future." Xia Shi said and glanced at his watch, urging Gu Song to say, "Let's go, time waits for no one, I will take you directly to see the crime scenes of the two cases, so that you can have an in-depth understanding of the case." ”

"Wait, I haven't promised to help you yet, why did you make a decision for me so quickly?"

"Any questions?" Xia Shi shrugged his shoulders disappreciatively, "Young Master Ben has personally come to invite you, you won't be so faceless, right?" ”

Gu Song really couldn't refuse Xia Shi's invitation. Based on his understanding of Xia Shi, if he didn't agree to participate in this case, he would probably be handcuffed by the other party in the next second, stuffed into a police car and pulled directly to the crime scene.

Thinking like this, Gu Song couldn't help but smile bitterly and shook his head. He turned to look at his friend's tombstone and whispered, "Qin Yu, I will come to see you again on the death day next year, if I can live safely until that time......"

The '9.16 case' occurred between 9 p.m. and 10 p.m., and the crime occurred in Room 403, Building 4, Ganges Community, Xuanyang District, R City. The victim's name is He Yao, a young and fashionable girl, 24 years old, who worked as a salesperson at the imported cosmetics counter on the first floor of a department store before her death.

The victim's body was found at around 11 a.m. on September 17 by Ma Zhichen, the boyfriend the victim was dating. Because September 17 was He Yao's rest day, the two of them had made an appointment to meet at the gate of Wanda Cinema in Xuanyang District at 10:30 a.m. to watch the movie "Rise of the Planet of the Apes 3" released at 11:10, but Ma Zhichen waited at the door of the theater until the movie started and did not contact He Yao, and no one answered more than a dozen calls during the period.

At first, Ma Zhichen didn't think about the bad side, thinking that He Yao just overslept, turned off the mobile phone and muted it, and didn't hear the phone. He took a taxi to the Ganges community, and while using the spare key to open the door of Room 403 of Building 4, he called He Yao's name in a complaining tone.

What he never expected was that as the door opened, a pungent smell of blood instantly hit his face. Realizing that something was wrong in the house, he hurried into the living room, only to see his long-dead girlfriend lying on the floor with frightened eyes open, covered in blood, and almost stabbed into a hornet's nest. What's even more bizarre is that He Yao's lips were pierced by the murderer with four steel nails with a length of 50 mm and a diameter of 2.8 mm.

The autopsy results showed that He Yao's time of death was between 9 and 10 p.m. on September 16, 2017, and the cause of death was a ruptured heart caused by a sharp object penetrating the chest wall. The murderer stabbed He Yao a total of thirty-two times, and each wound was very deep, indicating that the murderer was strong and crisp when he attacked, and there was no mercy or hesitation in it.

After identification, the murder weapon used by the murderer was a single-edged knife about 3 centimeters wide and 13 centimeters long, which matched the shape of a certain brand of fruit knife missing from the victim's home. The murderer's dominant hand was the right hand, and combined with the analysis of the wound shape and the angle of the murder weapon's penetration, there was a height difference of 10 cm to 15 cm between the murderer and the victim, so it is speculated that the height range of the murderer was about 173 cm to 178 cm.

There are no signs of prying or vandalism in the doors and windows of the victim's home, no signs of the contents of the home being turned over, and no belongings have been lost. The victim was well dressed and showed no signs of being sexually assaulted. The scene of the crime was simply cleaned, and no fingerprints, footprints, DNA and other relevant information of the murderer were found.

"Based on these clues, you speculate that the killer may be an acquaintance of the victim. On the night of the crime, the murderer should have entered the scene peacefully, because there was an argument with the victim about something, which caused his emotions to be out of control and his anger was abnormal. He grabbed the fruit knife on the table and stabbed the victim to death from the front, and then wreaked havoc on the victim's body......"

Gu Song looked around the scene of the crime that had not been touched, and imagined the scene of the murderer holding a fruit knife and stabbing the girl wildly, and he couldn't help but feel a chill in his heart. Although half a month has passed since that case, the blood stains left at the scene and the lingering smell of death still make people feel depressed and suffocated.

Xia Shi explained: "After the case, we combed through the victim's social connections and recent contacts, and found two suspected perpetrators.

One of them is He Yao's boyfriend, Ma Zhichen, who was the first to arrive at the scene of the crime and call the police. In fact, some time before the case, the relationship between He Yao and Ma Zhichen had broken down. He Yao has asked Ma Zhichen to break up more than once, but Ma Zhichen sternly refused, and even threatened and intimidated. Because Ma Zhichen has a criminal record, and has a domineering personality and a strong sense of revenge, he has the criminal motive to kill He Yao to a certain extent.

On the night He Yao was killed, Ma Zhichen claimed that he was playing games alone at home, but no one could prove whether his words were true. We questioned him many times, and he admitted that he did threaten He Yao in order to make He Yao completely dispel the idea of breaking up, but Ma Zhichen insisted that He Yao's death had nothing to do with him.

"The second suspect is Deng Jun and is a plumber and electricity repairman. On the morning of the incident, He Yao called Master Deng to make an appointment for door-to-door repairs because the water tank of the flushing toilet at home was broken. We learned from Master Deng that He Yao's appointment time was originally 7 o'clock in the evening, but because He Yao was unable to go home on time due to something temporary, he did not call in advance, so Master Deng ran away in vain.

Master Deng said that he only waited at the door of He Yao's house for about 20 minutes before leaving, and never entered the house at all. But when asked about his whereabouts, especially between 9 and 10 p.m., where he was doing, he said that he was watching TV at home, and then that he had gone for a walk, in any case, he could not provide a clear alibi. Although Deng Jun and He Yao did not know each other before, and Deng Jun did not have a criminal motive to kill He Yao, considering the nature of the case, it is also possible that the two people clashed on the spot, resulting in a murder of passion. In addition......"

Xia Shi breathed a sigh of relief and continued: "Deng Jun's identity is a plumber and electricity maintenance worker, and the toolbox he carries with him just happens to contain nails of various sizes. If he was the murderer, it would be better to explain why the victim's lips were pierced by four steel nails. Through our investigation, it was found that the victim's home did not have that kind of nail, that is, the murderer brought the steel nail himself to commit the crime.

"I don't think the average person has the habit of putting a nail in their pocket when they go out, except for premeditated crimes, of course. So from this point of view, Deng Jun is suspected of committing a crime. It's a pity that ......" Xia Shi spread his hands helplessly, "We haven't found evidence of the murderer's crime yet, and the second case happened." ”