Director He Pengfei saw the simple examination of the deceased's neck.

He didn't expect that Yan Feifan would make an important discovery in the first minute or two.

After the deceased's family left the laboratory, He Pengfei, who had a lot of knowledge about the causes of various deaths, confirmed his question: "Doctor Yan, is it a cardiac arrest caused by pressing the carotid sinus?"

Yan Feifan nodded!

The carotid sinus is located at the beginning of the internal carotid artery, where the blood vessel wall is slightly thin, and the lumen is slightly enlarged.

This part is the main pressure receptor, which feels the stimulation of blood pressure changes.

Carotid sinus is very sensitive to external stimulation.

When the carotid sinus is pressed, the carotid sinus feels increased external stimulation, parasympathetic nerve excitement, and muscle tone increase, which will cause the heart rate to slow down. The electrocardiogram will show that the PR interval will increase, causing a high degree of atrioventricular block, slowing down the heart rate, and reducing blood supply to the heart, resulting in symptoms of fainting in the brain nerve hypoxia and ischemia.

What's more, it can cause symptoms of cardiac arrest.

Yan Feifan pointed to the carotid sinus position on both sides of the deceased's left and right necks and introduced: "Pressing the carotid sinus will cause cardiac arrest, which is only a probability."

"To greatly increase this probability, you need to press it on both sides for a long time at the same time, for at least three to five minutes."

“My analysis is…”

At this moment, Yan Feifan transformed into Sherlock Holmes and said confidently: "The criminal pressed the carotid sinus on the side of the deceased's neck by kissing hard."

"The other neck is pressed by fingers."

"For a minute or two, the dead who are immersed in enjoyment will unknowingly faint."

"After the deceased faint, the criminal can unscrupulously press the carotid sinus on both sides of the deceased's neck until his heart stops."

"Of course, this is also a problem with the probability of cardiac arrest."

"However, from the fact that he is lying here now, his luck is obviously bad."

Yan Feifan touched the carotid sinus on the left side of the deceased with his fingers and said, "I can detect some subtle changes caused by the carotid sinus, skin, and muscles here due to long-term stress pressing."

At this time, Li Songzhu stretched out his hand and began to stroke and explore the position of the carotid sinus on the right side of the deceased.

After a while, he stroked the deceased's left carotid sinus again.

After careful investigation for a minute or two, Li Songzhu, who was tightly browed, shook her head and said, "Maybe I am not sensitive enough, and I can't figure out anything abnormal."

He complimented again: "It is normal for doctors to master the human anatomy structure in a magical way.

After pausing, Li Songzhu thought of something and questioned: "Doctor Yan, I heard that the deceased was caught and raped on the scene."

"The deceased wouldn't have been killed by the carotid sinus being pressed in public, right?"

Yan Feifan said in a deep voice: "I can clearly feel the abnormality in the position of the carotid sinus on both sides of the left and right sides. It can be asserted that these two places must have been subjected to a long period of pressure."

“I can’t be wrong.”

Yan Feifan, who emphasized one sentence, looked at Director He Pengfei.

"As for the incident, the police need to conduct a detailed investigation."

He Pengfei touched his chin and pondered, "The testimony of several witnesses at the scene is quite consistent."

"They said that the scene when the door opened was..."

While gesturing, he described, "The female student, who was so slim, stood obliquely on the dormitory elevated bed with both hands."

"And the deceased was also shining with his body, and he was stuck behind the female student."

"The two of them are still moving, that's quite devoted!"

He Pengfei added: "Immediately afterwards, the deceased's wife stopped them outside the door. His wife entered alone and closed the door casually."

"They heard the beating and scolding of the deceased's wife outside the door, and the female student begging for mercy."

"After a while, they suddenly heard the screams and calls for help from the deceased's wife."

"As they entered the dormitory, they found that the deceased who put on their pants was lying on the ground without breathing..."

He Pengfei suddenly stopped, his eyes froze, and he turned to say: "The deceased they saw lying behind the female student and moving, not necessarily the deceased was moving."

"There is another possibility that the female student is moving."

"They just preconceivedly believe that the dead are moving."

"Maybe, by that time, the deceased was dead."

He Pengfei said with a slight sensation: "The female student deliberately posed like this and let the few of them see it, creating an illusion that the deceased is still alive?"

Li Songzhu imagined the scene at that time and said, "This possibility does exist."

"As such an eye-catching scene, most people won't keep a close eye on it."

"When you are observing quickly, you will not see many details, but you just assume that the deceased is doing things."

"Just that happens, the female student and the deceased's wife must have conspired to do so."

He Pengfei looked excited and asked, "Doctor Yan, your compression of the carotid sinus causes cardiac arrest, should there be anatomical evidence, right?"

This asked Yan Feifan.

He thought for a while and said, "The long-term compression of the left and right carotid sinuses causes abnormalities in the carotid sinuses, skin and muscle tissue, which are very mild."

"So, this caused Dr. Li to fail to detect it."

"I can detect it, it's considered a talent."

"But these subtle abnormalities are also difficult to detect in dissection and cannot be used as strong evidence."

Li Songzhu then spoke: "It is difficult to clearly distinguish between cardiac arrest caused by pressing the carotid sinus from cardiac arrest caused by some other reasons in terms of anatomical manifestations."

He Pengfei asked: "In other words, it cannot be proved through dissection that the deceased died of cardiac arrest caused by carotid sinus compression?"

Yan Feifan and Li Songzhu looked at each other, then nodded at He Pengfei together.

Li Songzhu said slowly again: "If our speculation is true, they chose the method and process of committing the crime, which was obviously carefully planned."

"For example, use this circle of kiss marks to cover up the bruises caused by neck pressing."

"For example, letting the patient drink alcohol and take Viagra that is not too much, putting him on too much heart and increasing the likelihood and credibility of cardiac arrest."

"For example, the time of death of the deceased is just right, and the time of catching the evildoer should be just right."

"Perhaps, afterwards, they also massaged the compression area of ​​the carotid sinus."

Speaking of this, Li Songzhu couldn't help but glance at Yan Feifan and said, "But they didn't expect that Dr. Yan is talented and able to see what others can do."

"Otherwise, this would be a perfect crime."

He Pengfei smiled and said, "There is no real perfect crime in this world."

"The more detailed the planning is, the more preparation is required, and as long as we conduct in-depth investigations, we can find evidence."

He Pengfei looked at Li Songzhu and said, "Doctor Li, since Dr. Yan has made a new major discovery, according to the regulations, the deceased must undergo an anatomical examination."

"It's going to take you hard."

Li Songzhu nodded and said, "The responsibility is not a matter of hard work."

He Pengfei said in a deep voice: "Without anatomical evidence, we will start with interrogation and in-depth investigation."

"It is true that the deceased's wife planned and killed the deceased together. Their pre-examination and preparation work will definitely not be missing, and a lot of evidence will definitely be left behind."

"This case requires support from superiors..."

Sun Xiao, the family of the deceased, and the self-satisfied with gossip and inquiry, Zeng Ni and others waited outside the pathology laboratory for more than ten minutes, and finally waited for Director He Pengfei who came out.

"The situation has changed, and the deceased needs an anatomical examination."

As soon as this was said, it was immediately opposed by everyone except Sun Xiao.

He Pengfei looked stern and said with a serious face: "Because of some discoveries, other factors cannot be ruled out for the cause of death of the deceased."

"According to the law, an anatomical examination must be conducted. This is not something that your family can decide."

He Pengfei looked at the deceased's wife again, a woman in her forties with a sad and angry expression, as well as a middle-aged man beside her, the deceased's brother-in-law.
Chapter completed!