This is a tragic case that occurred on Chinese New Year's Eve, and all seven members of the family were killed, and the nature of the case must be an outright vendetta.

Even if the murderer has a grudge against the entire single family, he must have the deepest hatred with one of them.

And this kind of hatred hidden in the heart will make the murderer subconsciously carry out the most brutal revenge killing method when killing the other party.

In other words, whoever the murderer hurts the most, then it shows who the murderer has the most hatred with.

And these, for forensic doctors, as long as the fatal injuries on the seven deceased are compared to see who has the most serious fatal injuries, or whose fatal injuries are the most vindictive, you can find out who has the deepest hatred with the murderer.

Therefore, as long as the investigation focuses on the social relations of the deceased, there may be unexpected gains.

In the autopsy room of the forensic department, Ren Qiushi and Zeng Lan had just completed the autopsy of the first and second deceased in this case, and just as Zeng Lan was about to conduct an autopsy on the third deceased, Ren Qiushi suddenly interrupted her.

"An autopsy will be performed on deceased number seven first." Ren Qiushi said seriously.

Although Zeng Lan was puzzled by Ren Qiushi's behavior of conducting a cross-numbered autopsy on the corpse that had been numbered, she did not ask because she believed that Ren Qiushi must have his own plans.

So Zeng Lan didn't say anything more, but cooperated with Ren Qiushi to open the No. 7 body bag very tacitly, and carried the body of the No. 7 deceased Shan Jinfeng to the autopsy table.

Shan Jinfeng is the eldest son of the owners of this family, Shan Xuan and Qin Jing, Shan Xuan Qin Jing and his wife have a total of two children, the eldest son Shan Jinfeng, and the youngest daughter Shan Jinping.

Judging from the order of the crime, the murderer was the last to kill Shan Jinfeng, and when he killed Shan Jinfeng, he used an execution-style throat cut from behind.

Although the lethality of this method is the same, it is absolutely different from the perspective of the modus operandi and the murderer's psychology of committing the crime.

"I think when the murderer killed the seventh deceased, the revenge psychology was the strongest." Ren Qiushi said seriously.

At this time, Zeng Lan gave her different opinions: "I think the revenge psychology is the strongest when the murderer kills the fourth female deceased in the kitchen, after all, the murderer stabbed her seven times in a row." ”

Ren Qiushi pondered for a moment and said in a deep voice: "The main reason why the murderer stabbed her seven times in a row was that the murderer was desperately resisted by the fourth deceased at that time, and when the murderer entered the kitchen to commit the crime, the fourth deceased was obviously prepared, so the murderer's first knife did not stab the other party's vital point. In order to prevent the sound from alerting the three people on the second floor, the murderer would stab the murderer repeatedly in pursuit of lethality.

But when the murderer killed Deceased Seven, the situation was completely different, because Deceased Seven was the last person to be killed, and Deceased Seventh was operating a computer at the time, in a defenseless situation. Therefore, the murderer had 10,000 ways to kill at that time, ranging from a simple one-knife fatality to complex continuous injury, but the murderer chose an extremely cruel and execution-style method of cutting his throat. ”

Ren Qiushi's analysis is not unreasonable, and Zeng Lan also agreed after listening to it.

Next, they began autopsy work on deceased number seven in this case.

The seventh deceased is named Shan Jinfeng, 11 years old this year, and is a sixth-grade primary school student.

Who will a schoolboy make a feud with?

This is a question worth pondering.

"The wound was a sharp blade cut, the wound extended from the left carotid artery to the right carotid artery, and the neck muscles of the deceased, including the thyrohyoid muscle, scapulohyoid muscle, sternohyoid muscle and sternocleidomastoid muscle, were all severed, including the trachea. However, the wound is uneven, and there are many deviations in the wound. Zeng Lan recorded it in detail on the autopsy record sheet.

"This shows that the murderer did not use the sharpness of the fruit to cut his throat quickly, but used the fruit knife as a saw, repeatedly made sawing movements, and finally sawed open the throat of the deceased." Ren Qiushi said in a deep voice,

It was an absolute fatal injury, but the autopsy work still had to continue, and they needed to go through the autopsy to get more clues, such as the all-important time of death.

Ren Qiushi used a sharp scalpel to cut through the skin on the deceased's chest, peeling off the muscle tissue and mucosal tissue, and the deceased's internal organs were completely presented in front of Ren Qiushi and Zeng Lan.

As a very professional forensic doctor, Ren Qiushi sensed that something was wrong at a glance.

This boy who is only 11 years old has different degrees of lesions in his internal organs.

There are often bleeding spots of varying severity but not fatal on the internal organs, and there are also more serious infections in the respiratory tract.

The 11-year-old appeared to be suffering from some kind of blood disorder.

Ren Qiushi frowned suddenly, and glanced at Zeng Lan.

There is no one who does not get sick when people eat whole grains, and there is no age limit for sick people, so there is nothing surprising about this eleven-year-old boy who is sick.

But now Ren Qiushi needs to consider whether the disease suffered by the eleven-year-old boy has anything to do with this Chinese New Year's Eve case of killing the door.

Ren Qiushi calmed down and re-examined the body surface of the deceased.

Because the deceased had his throat cut and his blood was severely lost, the whole body was waxy yellow with blood loss, and even the corpse spots that should have appeared were minimal.

In addition, the deceased was injured in a sitting position, so the corpse spots were mostly concentrated in the lower limbs.

But even so, Ren Qiushi also said that some strange places were found on the body surface of the deceased.

The deceased had a lot of ecchymoses on the body surface, as well as signs of bleeding under the skin. Even though the bleeding spots on the skin were not obvious because of the serious loss of blood, they were still observed by Ren Qiushi.

"The deceased must have suffered from a serious blood disease, and since he is sick, there must be traces of medical treatment and medical records, and the test method for blood diseases is generally to draw blood for blood tests and bone marrow aspires." Ren Qiushi settled down and immediately inspected the bone marrow puncture site commonly used in medical examinations.

Generally, there are 4 locations of bone marrow puncture points: 1. anterior superior iliac spinal puncture point; 2. Posterior superior iliac spinal puncture point; 3. sternal puncture point; 4. Puncture point of the spinous process of the lumbar vertebrae. In general, the posterior superior iliac spinal puncture site is often used clinically, which is located on both sides of the sacral vertebrae, protruding above the buttocks.

"Here!" Zeng Lan found a wound mark left by a bone marrow puncture under the anterior tuberosity of the deceased's tibia.

"Extract the biological samples of the deceased and send them to the laboratory department for pathological tests to find out the cause of the deceased." Ren Qiushi said solemnly.

Zeng Lan nodded, and immediately walked to the workbench, preparing to collect the biological samples of the deceased......