I caught the murderer

It was eight o'clock in the morning, China time, and the morning light was just right. After the morning's laziness and wrangling, the special case team finally entered office hours smoothly.

"Have you collected all the relevant information?" Shen Zheng glanced at several people in the office, "Then let's talk about the poisoning case first."

"OK," An Xinyao was the first to speak this time, "On November [-]th, a murder occurred in Room [-], Building F, Lemin District, City B. Three victims died of cyanide|potassium poisoning."

"After on-site evidence collection, it was determined that cyanide|potassium was injected into a sealed large bottle of fruit juice and then drunk by three deceased persons, resulting in the death."

Cyanide｜Potassium is a highly toxic substance. Ordinary people will be poisoned to death as long as they come into contact with skin wounds or inhale tiny amounts of powder.

Moreover, cyanide|potassium is very soluble in water, although it has a bit of bitter almond smell, but with the cover of fruit juice, this smell is not so easy to detect.

The few people present were obviously familiar with the characteristics of this poison, so An Xinyao continued: "Where did the murderer get this highly poisonous thing? We haven't found out yet, and we can't rule out that the murderer is engaged in chemical-related work." Or there may be a special channel."

"The three deceased were Zhou Chao, Liu Qian and Zhou Xiaowei, who were husband and wife, father and daughter, and mother and daughter respectively."

"As the only survivor of a family of four, the eldest son Zhou Xiaojie discovered the death of his parents and sister, and then called an ambulance and called the police."

"Wait," Shen Zheng interrupted An Xinyao's narration, "Zhou Xiaojie also witnessed the death of his relatives?"

An Xinyao affirmed: "That's right, according to what Zhou Xiaojie said, he was doing his homework in the room at the time, and his parents and sister were watching TV in the living room. He didn't realize something was wrong until he finished his homework and left the room."

Pei Yuzhou commented habitually: "This kid is very courageous and calm."

"So is this a coincidence?" Shen Zheng touched his chin, "How is the relationship between Zhou Xiaojie and his family?"

"I heard from the neighbors that Zhou's family environment is not very good. Zhou Chao usually likes to drink. After drinking, he becomes more irritable. He directly swears in the community or in the corridors. Residents have complained several times."

This is different from the Sun family's situation. Shen Zheng looked at his notes, but maybe they are the same in essence?

"This family seems to prefer the younger daughter, which is Zhou Xiaowei." An Xinyao added, "The conditions of the Zhou family are good. Both children have their own rooms, but Zhou Xiaowei's room is much more refined than Zhou Xiaojie's."

"Sister Lan and I went to see it on the spot. Zhou Xiaojie's room is the simplest in this family, and it can even be said to be rudimentary. It looks out of place with this relatively wealthy family."

"So we have reason to suspect that Zhou Xiaojie's situation in Zhou's family is not good." Speaking of this, An Xinyao picked up Sun Jia's medical record with some doubts, "But unlike Sun Jia, Zhou Xiaojie has no scars on his body, and there is no scar on his body. It doesn't look like you are suffering or have suffered domestic violence."

Pei Yuzhou said, "Have you met Zhou Xiaojie?"

"No," An Xinyao shook her head, "He was picked up by his grandma who lives in the country a few days ago, and it will take some time to rush over to cooperate with the investigation."

Although Zhou Xiaojie was the first witness to the poisoning case, the case has not progressed for a long time, and it is impossible for the police to detain him, especially if the other party is a child.

"Call him over as soon as possible. I suspect that he has also talked to the murderer before." Pei Yuzhou calmly threw out a speculation, regardless of the reaction of everyone. "At least he should have seen the murderer."

"Talk to the murderer?"

"also?"

Qin Qianlan's and Ji Jie's voices sounded at the same time, and Pei Yuzhou didn't give a shit, and immediately explained: "That's right, I heard it from Sun Jia."

"The girl had talked to the murderer when she was tied up, and the murderer even taught her how to pretend to be a PTSD patient."

This sounded unbelievable, and Ji Jie couldn't help asking: "Doesn't she hate?—I mean Sun Jia, she would actually listen to a murderer who killed her whole family?"

Qin Qianlan was also puzzled: "Even if you don't hate, you should be afraid, right? That scene was so bloody."

She has seen the photos of the scene. Even if Sun Jia has no hatred for the murderer because of domestic violence, she should still feel terrified after experiencing such a bloody scene at the scene. Logically speaking, it is normal for her to hope that the police will catch the murderer as soon as possible. .

"It's because of fear," Pei Yuzhou said, "She doesn't trust the police."

Because in the previous days, the police did not rescue her from the domestic violence environment.

Instead, the murderer did it.

Fear, coupled with a little recognition of the murderer, Sun Jia would naturally do what the murderer said.

Maybe this is naive in the eyes of adults, but the world of children cannot be measured with the eyes of adults.

"And the characteristics of the murderer." Pei Yuzhou took the whiteboard marker in Shen Zheng's hand, "A middle-aged man in his 40s, about 1.8 meters tall, and his build is temporarily unknown."

"He was wearing a black raincoat and rain boots, rubber gloves and a mask when he committed the crime, and the murder weapon was a meat cleaver."

"The time of the incident was around five o'clock in the morning. Sun Jia was sleeping at the time. She didn't know how the murderer got in. By the time she became conscious, she had already been tied up by the murderer and taken to the bedroom."

"The other three members of the Sun family were lying on the bed without knowing their personnel, and then the murderer carried out his atrocities."

"Because the victim's blood was basically absorbed by the sponge cushion on the bed, no effective information such as bloody footprints was left at the scene."

Shen Zheng looked at the whiteboard: "So Sun Jia didn't see the murderer's face?"

Pei Yuzhou confirmed, "Yes, but the lock in Sun Zhijian's house did not show signs of being violently damaged. Based on the premise of five o'clock in the morning, it should be an acquaintance who committed the crime or the murderer secretly obtained the key to Sun Zhijian's house."

"It makes sense," Shen Zheng turned his head and ordered, "Qian Lan, pay attention when you check your relationship network."

Pei Yuzhou continued: "At present, we only found the meat cleaver. It was cleaned very clean. Although the blood reaction was tested with luminol reagent on the knife, no fingerprints were found."

This is a murderer who is crazy enough and cautious enough, all his actions are calm, as if he is acting according to a plan that has been perfected long ago.

"Then the murderer must have a package big enough to hold his outfit," Qin Qianlan said, "Many people got up at five o'clock in the morning, so it's impossible for him to walk around in that strange appearance."

An Xinyao continued: "Besides, no blood reaction was detected in the corridor, which means that the package is very well sealed, and it is likely to be a plastic bag or something."

"The man with the package..." Ji Jie pondered, "There seems to be such a one."

"However, he appeared to be dressed normally and neatly, and the surveillance video only showed him leaving the community."

He and An Xinyao watched Bansu's community surveillance yesterday, but there were about four or five people who showed up at that time that day, and they couldn't lock the target very well.

However, after the speculation about the package, a person suddenly popped up in his mind.

Ji Jie called up the monitoring screen and connected the computer to the big screen in the office. The time was fixed at [-]:[-] in the morning, and a man dressed in black and with a black backpack slanted across appeared at the gate of the garden community.

It's just that the monitoring equipment in the garden area is relatively old, and the pictures captured are not clear. In addition, the suspicious man was wearing a mask and hat. Ji Jie couldn't see the man's facial features clearly after zooming in on the picture.

"Let's leave it to the colleagues in the technical team to deal with it," Shen Zheng looked at the picture thoughtfully, "The height and time are right."

An Xinyao disagreed instead: "He doesn't look very strong, he doesn't look like someone who can dismember three corpses."

You must know that dismemberment cases in reality are not as easy as in novels. Even if the murderer knows the relevant knowledge of human body structure, it will take a lot of strength to actually implement it.

Ji Jie said: "The autopsy report shows that the incisions on the corpse are relatively neat. The murderer did not use brute force to dismember the corpse. He should be engaged in medical related work, or have a certain degree of medical literacy."

"However, the three victims of the dismemberment case were dismembered after they were strangled to death," An Xinyao added. "This proves that the murderer was extremely powerful."

"But at that time, the three victims were all in a coma due to ether, and their resistance to the murderer was minimized," Ji Jie insisted. Literacy and access to chemical reagents intellectuals."

"Besides, strength can't be measured by body size alone. The man on the surveillance screen should be the main object of our investigation."

Shen Zheng was listening to the discussion between the two while looking at the screen, and then threw the question to Dr. Pei in one sentence: "Let the professional do it."

He turned his chair to Pei Yuzhou, "What do you think of Yuzhou?"

Pei Yuzhou didn't evade it either: "I'll put aside the man on the surveillance camera, and simply make a portrait of the murderer."

"Male, 30 to 40 years old, about 1.8 meters tall, with medical, chemical and psychological literacy, and has channels to obtain the chemical reagents used in the murder."

"Calm but contradictory."

The expression on Shen Zheng's face changed: "Contradictions?"

"That's right, the murderer's full of negative emotions can be seen from the murderer's behavior of dismembering all three victims," ​​Pei Yuzhou said, "Anger, hatred or pain, no matter whether his emotions are aimed at the three victims Or empathy, we could all see that he was a cruel man."

"However, he chose to let the victim be strangled to death in a coma, which is a relatively 'soft' method of killing. This method is on the opposite side of his subsequent dismemberment."

"Among the several possibilities that can cause this contradiction, I am more inclined to physical or personality factors."

Pei Yuzhou pointed to the man who was designated on the screen: "For example, his body is not strong enough to ensure that he can complete enough 'intense' killings, so he can only take the next best thing and vent after the death of the victim."

"Or he is a weak person at all, and he dare not perform any venting behavior before the victim's death."

"So he chose poisoning for the first time, and the confidence brought to him by the two successes prompted him to carry out the subsequent act of dismembering the corpse."

Everyone followed his fingers to see that the man on the screen was tall and thin but shrunk his shoulders, giving off a cowardly feeling for no reason.