Department of Psychology Forensic

Chapter 124 The Two Murderers Are Related

After determining the cause of injury, the next inspection is much easier.

Zhou Zheng and Cui Jun carefully inspected the victim's body surface, measured and photographed the scars at each location for comparison.

"The blank area in the hollow of the bamboo is 35mm, and the area of ​​each scar is very similar, with a difference of no more than 2mm, so it can be determined that they were injured by the same wounding object." Zhou Zheng said in a deep voice.

"That's right, the wounds on the victim's body were all caused by the same wounding object. Except for the stick wound, no other injuries were seen. This shows that the murderer used sticks to beat the victim from beginning to end during the fight." Cui Jun made a serious analysis and continued: "Then, the fragmented items at the scene should have been thrown out when the victim fought back."

"Master, do you think it's possible for those thrown objects to hit the murderer?" Zhou Zheng suddenly realized the possibility.

"It's very possible." Cui Jun nodded. With more experience, he replied almost without hesitation: "The murderer is holding a stick-type murder weapon with a diameter of at least 35mm and a soft contact surface. Such weapons are usually soft. A rubber tube is more like a hard stick such as metal or wood with a protective film on the outer layer, so this kind of weapon with a certain weight cannot be too long if you want to fight, and if it is too long, it will also affect the performance of the murderer, so , the murderer can hit the victim so many times, he must be close to him, so he cannot avoid being injured."

"That makes sense." Zhou Zheng nodded. He had already imagined Zhang Xin's rebellion. When people encountered a fatal threat, they would burst out with a strong desire to survive. At that time, they would instinctively use everything around them to resist. Things like grabbing a water glass and throwing it out are quite normal. In addition, the distance is relatively short. If it hits, the lethality is still quite large.

Zhang Xin was beaten so many times in a row, judging from the traces at the scene, he must have not given up resisting.

He was in a state of resistance until he was beaten to death!
Then it is impossible to not harm the murderer at all during this process.

When people encounter the threat of death, not only will they burst out with a strong survival instinct, making their combat effectiveness stronger, but they will also try to form a pair as much as possible when they realize that they must die.

"In a while, I will negotiate with the people in the trace inspection department to check whether there are blood stains on the fragmentary evidence."

When Zhou was saying these words, the hopeful glint that had just appeared in his eyes gradually dimmed.

How can it be so easy!
If these items hit the murderer in a thrown state, it may indeed cause damage, but such items cannot be stained with blood.

If you want to get blood stains, you need to do secondary damage to the wound!

It's like you pick up a cup, even if you throw it on the opponent's head, breaking the opponent's head, the cup falls to the ground and shatters into countless fragments, which cannot be stained with blood.

If you want to be stained with blood, you need to hold a cup and smash it over. When you hit the same position repeatedly, if the wound is damaged, the next time you hit it, it will be stained with blood.

Obviously, Zhang Xin was in a panic and had no way to hit the murderer with such objects.

The murderer had a stick in his hand. As long as he kept his distance, the murderer could hit Zhang Xin, but Zhang Xin couldn't hit the murderer.

After all, an inch is long and an inch is strong!

However, apart from blood stains, skin flakes may be stained and DNA information may be left behind. However, such items may be stained with too much skin flakes, and it is difficult to be convincing in a legal sense.

"It doesn't seem that simple!"

After Zhou Zheng finished speaking, he realized the seriousness of the problem. If the crime happened at Zhang Xin's residence, then there were other people's skin flakes on the cup that did not belong to Zhang Xin, which could explain the problem.

However, in a place like a hotel where people come and go, it's normal to have skin flakes on the cup.

"Let's see if we can find anything else." Cui Jun looked towards the mouth of the deceased, and his intuition told him that the murderer did not do such a thing casually, which seemed to have some special meaning.

"Well." Zhou Zheng looked over, his head was thinking, and said: "It is not clear what the murderer's motive is, it depends on the investigation results of Zhao Lei, if the cleaning lady did not take the property, it belongs to the murderer. If you leave, then there is still the possibility of trespassing..."

"Zhou Zheng!" At this moment, Cui Jun interrupted Zhou Zheng, looking at the latter with a serious face.

"Master, what's the matter?" Zhou Zheng asked.

"Do you believe what you said just now?" Cui Jun stared at Zhou Zheng closely, as if he wanted to see his deepest thoughts through the changes in Zhou Zheng's cheeks.

"I don't believe it." Zhou Zheng shook his head, sighed, and said, "The deceased's teeth were smashed. I don't know exactly what it means, but at least it is purposeful, a bit like seeking revenge."

"That's pretty much the same." Cui Jun put away his cannibalistic eyes, and said, "Even if the murderer takes away the victim's property, it's still easy to kill, not for the property. What do you have? Different opinion?"

"No." Zhou Zheng also thought so, not only that, but deep down in his heart, he still felt that there might be some connection between the death of Zhang Xin and the death of Zhang Chi.

"Look." Cui Jun pointed to the victim's mouth, carefully cleaned the blood on the gums, and poked the gums with a hemostat, and said: "The teeth of the deceased were all bent inward at a certain angle. I went to take a CT scan of the deceased. I think the alveolar bone of the deceased has been deformed, and there are obvious redness and swelling on the gums, which has a life reaction. This shows that before the deceased was murdered, he was beaten from the outside to the inside, and the teeth were violently smashed. knocked off, resulting in fracture and bending of the alveolar bone.”

"This kind of abnormal behavior is what the murderer wants!" Zhou Zheng suddenly realized, and said: "Normally, a murderer would not do such a meaningless thing. This is far more troublesome than killing directly. In this During the process, he risked being discovered, but the murderer is still willing to do so, which shows that he attaches great importance to it, and not only that, but the murderer also took the shattered teeth from the victim’s mouth and took them away.”

"The murderer's goal is probably the teeth." Cui Jun's face was tense, as if he realized something, and said, "I didn't find any loose teeth."

"This is another common point." Zhou Zheng said: "Not only did Zhang Chi and Zhang Xin lose their teeth, the murderer also took their teeth away."

"It's not such a coincidence!" Cui Jun's eyes were quite solemn. He thought in his heart that the two cases were the same murderer, but he also agreed with Zhou Zheng's words, and felt that the men and women of the two murderers were different. Then he muttered to himself: "Could it be that the murderer can switch genders..."

"and many more!"

After Zhou Zheng heard Cui Jun's words, he suddenly thought of something, his eyes widened, and his brain suddenly ran at a high speed.

Reasoning is like this. Sometimes the thinking gets stuck and you can't figure it out no matter what, but you are awakened by someone else's casual sentence.

This situation has been encountered by many criminal investigators.

Therefore, during meetings, everyone often speaks freely, expressing their thoughts and judgments.

Although everyone has studied criminal investigation to solve cases and thinks within a certain logic, everyone's way of thinking is somewhat different. When encountering the same case, they will have different insights in the subtleties, thus thinking Collision.

Zhou Zheng's sudden words made Cui Jun stop what he was doing, and stared at him suspiciously.

"Master, just now you said that the murderer switched genders, and I suddenly thought of a possibility!" Zhou Zheng's breathing became rapid.

"You don't really agree with this sentence, do you?" The corner of Cui Jun's mouth twitched fiercely behind his mask. This is obviously impossible. After all, the combat effectiveness of the two murderers shown on the scene is very different.

"Actually, we have always been substituted into the inherent concepts." Zhou Zheng shook his head and said slowly: "After we found out that the teeth of the two deceased had been pulled out, we instinctively thought that this was a serial case involving the same murderer. , However, after seeing the very different scenes, I felt that the two cases were done by different people. In such a contradiction, I don’t know which side to lean towards.”

"Zhou Zheng, what do you mean..." Cui Jun frowned even more tightly.

"Is it possible? Our judgment is correct!" Zhou Zheng said solemnly: "These are two different cases, but they are related. The murderers of these two cases are a man and a woman, so the relationship between the two murderers is This is the reason for the special symbol of smashing teeth."

"You mean they may be husband and wife?" Cui Jun quickly digested Zhou Zheng's words. In fact, it is very uncommon for two people who are close to each other to commit crimes one after the other. Usually, there will be one main criminal and the other an accessory criminal in the case. They are all the main culprits, and it is rare to meet each other to kill each other alternately.

"Not necessarily." Zhou Zheng shook his head and said, "It may be a husband and wife, it may be a boyfriend and girlfriend, or it may be brothers and sisters. No matter what their relationship is, the two of them must have a relationship!"

"Hmm..." Cui Jun thought for a while, nodded, and said, "I agree with your point of view."

"However, such a view is not mature, lacks evidence support, and many details cannot withstand scrutiny, so it can only be used as a reference." Zhou Zheng said after taking a deep breath.

"You can think so much. I think it will be of great help to solve the case. After the autopsy is over, you can negotiate with Xia Yan and talk about what you just thought of." Cui Jun confessed.

"Ok."

Zhou Zheng nodded, suddenly, his mood was a little complicated, just when he heard Xia Yan's name.

The death of Zhang Xin Zhang Chi's father and son may involve a serial murder case involving different murderers who are connected. Such a case is a very big challenge for Zhou Zheng.

The murderers in the two cases are different, and the scenes are different, so the portraits of the suspects are bound to be different. After all, two people cannot be drawn as one person. Therefore, from the perspective of criminal psychology, these two cases are different cases.

Of course, the reason for Zhou Zheng's complicated mood was not this complicated case, but when he heard Xia Yan's name, he thought of the unresolved case of dumping corpses on the cross-sea bridge.

Because of the sudden occurrence of the Zhang Xin case, Xia Yan was unable to confirm whether the victim of the cross-sea bridge dumping case was actually Su Xi.

"We continue with the autopsy."

Cui Jun took out a scalpel and showed Zhou Zheng his real skills. He shaved off all the hair of the deceased at a very fast speed. He could immediately see shallow bloodstains on the scalp. The hollow stick marks are similar.

After taking pictures and recording, Cui Jun gently cut open the scalp of the deceased, exposing the bones at the top of the skull.

"The injury on the skull is not serious, but I don't know what's inside the skull." Cui Jun looked at the skull of the deceased, and he could see several fracture lines, but the brain tissue was not exposed, and blood was faintly leaking from the cracks. , very faint, if you don't look carefully, you can't see clearly at all.

Zhou Zheng followed to look at the past, constantly absorbing experience.

Next, Cui Jun took out the craniotomy saw, and with a buzzing sound, removed the skull of the deceased.

After cutting the dura mater, the damage to the brain tissue emerged impressively.

There was a huge hematoma in the dura mater on the top of the deceased's head, and the brain tissue showed signs of shattering.

The location corresponding to this injury happened to be the location of the skull fracture line.

Cui Jun looked down the brain tissue, made sure that there was no fracture at the base of the skull, then nodded and said, "This is an impact injury."

Concussion injury is an injury caused by accelerated movement of the cranium, the most common being an external blow.

Corresponding to this is the deceleration of the brain, which is common in falls, which will cause concussion injuries in the brain, and injuries on the other side of the impact, which are relatively easy to judge.

For example, if a person has a scar on his forehead, after craniotomy, if there is only brain contusion at the injured part and no other parts, then this is the impact injury caused by the accelerated movement of the cranium caused by the blow, but if the brain corresponding to the forehead If there is the same injury in the same place, it is a concussion injury, indicating that the brain has decelerated.

If it is determined that it is an impact injury, it can be determined that it is a mechanical injury, which is caused by a large external force.

"Such a large dural hematoma, coupled with brain contusion, is a very serious brain injury. Zhang Xin was beaten to death with a stick!" Cui Jun immediately made a judgment.

"agree!"

Zhou Zheng nodded. Such a judgment is not difficult to make. After all, the deceased did not show signs of mechanical suffocation, and had severe head injury, so it is almost certain that the death was caused by mechanical injury.

However, in this case, anatomy of the thoracic and abdominal cavity is still needed for further judgment. However, Cui Jun is well-informed and experienced. After confirming the fatal brain injury, he can already make a confirmation.

(End of this chapter)