Yunhe City Criminal Investigation Detachment Conference Room.
Jiang Rong is posting some photos taken by the forensic team on the whiteboard in the conference room for display. Under the guidance of Wen Qiao, several of their interns completed the autopsy on Wang Ming, so the task of reporting the results of the autopsy fell on Jiang Rong.
This was the first time she gave a formal report at the detachment's case analysis meeting. She couldn't help but feel a little nervous, with a slight blush on her round face.
"Yesterday we completed Wang Ming's autopsy. Through our inspection of the deceased's body and interviews with witnesses at the scene, we can accurately determine the deceased's time of death to 8:05 pm."
"The deceased encountered no obstacles when falling from a high altitude and directly hit the concrete floor. Due to the effect of the center of gravity, the deceased's head hit the ground first, so the skull suffered severe comminuted fractures, skull base fractures, and cervical vertebrae. Compression fracture, contusion and overflow of brain tissue. There was bleeding in the ears, nose, and mouth, and subcutaneous bleeding in the eyelids, which was purple. There was extensive subcutaneous bleeding, contusion, and lacerations on the side of the trunk that was in direct contact with the ground. Severe internal damage , the spleen, and liver were severely ruptured."
"So, we judge that the direct cause of Wang Ming's death was severe craniocerebral injury and internal organ damage caused by falling from a height."
Hearing Jiang Rong's conclusion, Ling Feng couldn't sit still. He interrupted and asked, "You mean Wang Ming was still alive before he fell from the building? Did he fall before his death?"
"At least that's what it looks like from the autopsy results." Jiang Rong nodded. "Most of Wang Ming's physical injuries were caused by one-time violence, that is, the shock effect of the huge violence at the moment he fell to the ground. There was obvious bleeding around the liver, spleen pedicle and kidney pedicle. If the body was thrown after death, Since the heart has stopped beating and cannot continue to supply blood to the internal organs, the bleeding of these organs after severe impact is often relatively mild." After speaking, Jiang Rong placed a few photos on the conference table for everyone to see.
This conclusion was obviously somewhat beyond Ling Feng's expectations. All the unreasonable doubts at the scene made him naturally believe that Wang Ming was killed and his body dumped. However, what Jiang Rong said later cheered him up.
"Although Wang Ming was not dumped from upstairs after his death, we also found some unusual places on his body."
"First of all, although his skull suffered a comminuted fracture, based on the analysis of the stress and fracture shape of the bone, we found that in addition to the one-time high fall injury, there was also a relatively minor impact. And this impact is likely to occur before the high fall injury, because around this smaller wound, we found a slight life reaction, that is, the phenomenon of blood coagulation. This shows that Wang Ming was injured before falling from the building. , the head may have been hit by some kind of object, and it was this hit that made him lose the ability to resist, giving the murderer an opportunity."
"In addition, when the body of a person who commits suicide by jumping from a building falls, in addition to the downward force, there is also an outward force. However, when someone falls accidentally, is pushed down, or kills someone and throws the body, the only force is downward. The force to rush outward is very little or no. Therefore, the projected distance between the end point of the suicide and the starting point of the fall is often larger than in other accidental situations. According to statistics, the landing point of the body of a suicide jumper is far away from the building wall The ratio of the base distance to the fall height is generally greater than 1/7, and the ratio of accidental falls or homicides is generally less than 1/7. In our case, Wang Ming’s fall distance was within the range of less than 1/7 inside."
"So, we judge that Wang Ming was first hit by some force, causing him to fall into coma, and then he was thrown from a tall building, causing death."
After saying this last sentence, Jiang Rong turned her eyes away from the materials in her hands and looked at the other people present, as if they were students asking teachers to comment on their homework.
Ling Feng nodded, affirming her work: "Besides, are there any other discoveries? What we need is evidence that can catch the murderer."
Jiang Rong was stunned by his question. She had already finished all the information she could get from the corpse. Logically speaking, there was only so much that their forensic doctors could do. She really didn't know how to answer Ling Feng's question, so she could only answer it with one question. With a confused face, he looked to Wen Qiao for help.
Wen Qiao didn't look at her, and the conference room fell into an embarrassing silence for a while.
"You attach too much importance to physical evidence." After a long time, Wen Qiao suddenly said this softly.
Ling Feng was unconvinced: "This is strange. What should we look at if we don't look at physical evidence when handling a case? Physical evidence is the most objective and irrefutable piece of evidence."
"What I mean is that you focus too much on the 'what's' and not on the 'what's not'."
"What do you mean?"
"You have all heard Jiang Rong's report just now. We can come and reconstruct what may have happened at the scene." Wen Qiao said slowly: "That night, Wang Ming left work early in the morning, but for some reason he suddenly returned to the office. , this time was about 7:30 pm. What is strange is that he went not to his own office, but to Gao Liqun's office. When he entered the room, he was suddenly attacked, causing his head to be hit. He collapsed to the ground, accompanied by bleeding, and the blood flowed to the floor. This also explains why the murderer poured a large amount of sodium hypochlorite solution on the ground."
"This is something I've always wondered about. It's common for murderers to want to destroy evidence, but to do so blatantly, doesn't it clearly tell us that there's something wrong with this case?" Ling Feng asked.
"Because the murderer knew in his heart that faking suicide would not work. With such clumsy means, forensic doctors can detect it as long as they pay a little attention. The police will eventually know that there is something wrong with Wang Ming's death. Since the police will find him anyway If something goes wrong, then instead of covering it up carefully and leaving no trace, it would be better to completely destroy all biological evidence."
"At the same time, this also illustrates a problem. The murderer probably did not have much time to clean the scene, so the attack on Wang Ming was probably an unexpected thing, rather than a premeditated murder."
"No premeditation?" Ling Feng somewhat disagreed with this view. "If there was no premeditation, why would he prepare so many sodium chlorate solutions to destroy evidence?"
Wen Qiao glanced at him with some approval: "Although your reasoning ability is not very good, your mind is quite thoughtful."
These words were both praise and understatement. Ling Feng finally resisted the urge to roll his eyes and waited patiently for him to finish his words.
"The first impact injury on Wang Ming's head was caused by an object that was neither too sharp nor too hard. Based on this, I later went to the scene again to see if there was anything around that would form Such a wound. Sure enough..." Wen Qiao paused and suddenly knocked on the table in front of him with his hand.
"His head probably hit the corner of the table, and I extracted a trace of blood stains from a corner of the table. The DNA comparison results are not out yet, but I believe there should be no problem."
"And the fact that he used sodium hypochlorite solution to destroy evidence not only does not mean that he had premeditated it, but it more strongly proves that the incident happened suddenly."
"How do you say it?" Ling Feng asked.
"In premeditated crimes, people often make a series of preparations and plans in advance, and carry weapons, props and other items to the crime scene. In cases of impulsive or accidental crimes, the murderer will often use... Those things that are within easy reach, such as the ashtray on the coffee table, kitchen knives, mops, etc. in the victim’s home.”
"You mean... those sodium hypochlorite solutions were already at the scene? How could such a coincidence happen?" Ling Feng was puzzled.
"Perhaps it cannot be said to be a coincidence." Wen Qiao said: "Have you forgotten that an even more exaggerated bloodshed occurred in the next room two weeks ago?"
Ling Feng's eyes widened in shock.
"That's right. After Gao Liqun was killed in another office, the company hired special cleaning staff to clean up that place. In order to thoroughly clean the scene and eliminate employees' doubts and fears, they also purchased a large amount of bleach Agents were used to disinfect the site many times. I asked the employees of Boya Company and found that the three bottles of sodium hypochlorite solution were leftover from the last time the site was cleaned, and were later placed in a corner of the bathroom."
"Given the time between when Wang Ming was first hit and when he was thrown downstairs, it can be considered that the murderer did not have enough time to clean up the crime scene. But in a hurry, he not only completed the follow-up plan, but also cleaned up the crime scene. A series of complex tasks such as checking the scene and moving the body. This shows that he is likely to know that there are three bottles of bleach that can eliminate all biological evidence in a corner of Boya Company, so that he does not have to carry out a series of complex tasks throughout the company. Search for available tools or materials so that he can get straight to the point. This explains why he was able to accomplish all this in such a short time.”
After hearing his reasoning, everyone couldn't help but admire secretly in their hearts.
Only Ling Feng frowned and said thoughtfully: "If your reasoning is true, then the murderer is most likely an employee within Boya Company, because only they know best what is in their company."
"It's possible, but unlikely."
"So what do you mean?"
"If they are employees of Boyaa Company, then they can stay in the company openly and reasonably. There are plenty of opportunities to do small things if they want to. You don't have to do it secretly after everyone is gone after get off work. Even if they are discovered Even if he stayed in the company very late, he could also use reasons such as working overtime as an excuse. Why is there any need to go to this point? What's more, he also wiped out the surveillance of an entire floor."
"And have you noticed that the murderer only tampered with the surveillance on the 15th floor. The surveillance at the entrance of the building and the entrance and exit of the park are all normal. After we arrived at the crime scene, we immediately checked the surveillance videos of these entrances and exits. During the time when the crime occurred, we did not see any suspicious persons. A few people who had been in and out were also found by us, and after questioning, they have been ruled out as suspects. You should know this best. "
Ling Feng nodded. .
"After the murderer finished his crime on the 15th floor, he disappeared into the building out of thin air. No one was photographed at the entrance and exit of the building where Boya Company is located after 8:05."
Ling Feng felt that the answer was already coming out.
