"How did the murderer get so much blood, it depends on what kind of blood the test results show, right? If it's not human, it's animal, then there can be many means. If it's human, it's a little narrower. For example, a black clinic, a fake blood bank, or ...... Buying and selling. Guan Shan looked at Luo Chuan, they all knew that it was difficult to find a place where they could buy and sell fresh blood. The place with the highest success rate is the deep web where countless dirty perverts and perverts are hidden.

Luo Chuan said to Xing Lao again: "Can you always introduce us to the fatal injury?" These people have been stabbed like this, and they must have serious internal organ damage. ”

"Yes."

"That'...... From the direction of the wound, can you judge the strength and height of the murderer's dominant hand? "The strength can judge the body type, the direction can judge the height, and if the height and body shape are all there, the external image profile of the criminal will be partially completed.

But at this time, Xing Lao showed an elusive smile, walked around Luo Chuan to the side of another female corpse, and then said extremely professionally: "First of all, let me explain it to you first. The murderer treated the male and female victims without the slightest difference, without any sexuality, (fantasy). He was not more tyrannical because of the female parts, nor was he soft because the deceased was female. In his eyes, the dead are the ones who deserve to die, and letting them die is the only purpose. ”

Such killings, without obvious purpose and meaning, are often the most headache for the police. Luo Chuan clenched his fists, nodded and said, "Well, you continue." ”

"The biggest feature of sharp injuries is the rules of form. The wound will open along the course of the striae on the body. On our body, this layer of skin is not simple, and the lines in different directions are also called body surface split lines. In common cases, according to the different murder weapons used by the murderer and the different ways of focus, sharp wounds are generally divided into stabbing wounds, slashing wounds, cutting wounds and scissor wounds. Based on the depth and direction of these wounds, the height ratio and body size of the murderer and the deceased can be inferred. Xing Lao's professional analysis fascinated the assistant forensic physician on the side. This is not only to analyze the dead for Luo Chuan and Guan Shan, but also to impart experience and knowledge.

Xing Lao raised his eyes to look at Luo Chuan, still with the unpredictable wry smile just now: "You probably understand all of this." However, this knowledge, applied to these four corpses, was useless. ”

"What did you say?" Luo Chuan was taken aback again.

Xing Lao nodded: "The only thing I can tell you for sure is that the murder weapon is a single-edged stabbing weapon." Such as fruit knives, switchblades, table knives and so on. However, if you have to stab so many times, the table knife is not sharp enough, and the possibility of a fruit knife is relatively large. Did you find the murder weapon at the scene? ”

"Nope. Wait a minute...... Did you just say that there is no way to guess the height and strength of the murderer? Luo Chuan is very concerned about this problem.

Xing Lao pointed to several wounds of different depths on the corpse and said, "These wounds have different depths, different directions, and different strengths. If it is investigated by ordinary methods, then this murderer probably helped the old and young family to do this case. Look at this, the puncture wound in the lower abdomen can actually be from the bottom up. The female victim is up to 1.6 meters tall. Below his lower abdomen, the person who has to stab upwards, how tall do you say he is? These wounds look as if they are coming from all directions. Since there was no penetrating wound, I couldn't tell the problem from the stab. If...... I mean, if the murderer in this case deliberately did this to counter-investigate, then I can only say that every knife he uses is designed and accurate! Xing Lao showed that wry smile again, this time, Luo Chuan seemed to understand, it was a kind of bitterness and helplessness that was powerless but had to recognize the change of —-,.

Luo Chuan looked down at the unrecognizable female corpse, looking at the wounds that were not equal in size due to different depths, and he was a little distracted. This case seems to be getting more and more complicated. It has nothing to do with the moonshine case, but it involves a lot of blood and precise killing skills and counter-reconnaissance methods. But if it is related, what Guan Shan said is not unreasonable. The perfect offender will not easily change the sign of the crime. What about his logo? Even if there is no moonlight song, there should be a hint of "meaning" for killing. None of that, however. The bodies were deliberately placed in an abandoned parking lot, which really didn't look like the man had done.

Seeing Luo Chuan distracted from the corpse's wounds, Xing Lao sighed and said, "Don't worry too much, it's useless to worry." Although in your opinion, these wounds are very different, and it may not even be easy to judge the murder weapon, but isn't there this forensic office behind your back? I can at least help you determine the type, size, blade width, length, etc. of the murder weapon. The murderer was more ruthless, and many knives directly pierced the pleura, peritoneum and internal organs. I compared the stabbing entrances, the envelope on the surface of the viscera and the wounds on the skin in these parts to determine that the width was the same, that it was caused by the same murder weapon, and that the sharpness was the same. ”

Speaking of this, Xing Lao pointed to the other two male corpses and said, "Those two people, at first, I was a little skeptical of my judgment, because one was stabbed in the heart, and the other was stabbed in the rib cartilage. The stab wounds on the costal cartilage are particularly prone to mutation, which can lead to misidentification of the murder weapon. The wound formed on the back side of the murder weapon was sharpened by the tear, and the wound was easily closed, and I also carefully judged it several times before I dared to conclude the murder weapon. As for the other one, because the heart will beat non-stop, no matter what murder weapon stabs it, it is easy to form a mutated wound. The deceased suffered stab wounds to the right ventricle, the beginning of the aorta, the pulmonary artery, the atria and the superior and inferior vena cava. The wound angle was torn, the wound cavity was irregular, and even the wound was shrunk to a much smaller size than the murder weapon I had deduced. But this is not a big problem, and in the end I confirmed that it was a murder weapon, and it was definitely the same murder weapon. ”

After Xing Lao finished speaking, the forensic office was silent. The silence made the air heavy. The forensic doctor who had been observing silently on the side didn't dare to interject or ask more, but only looked at the people in front of him secretly.

Guan Shan took a few steps outside, thought for a moment and said, "Since you can't accurately profile from the external image, then start from the inside of his psychology, it's not impossible." Looking at the injuries of these people, on the surface, they seem to be crude and brutal. But judging from Xing Lao's analysis, this person has careful thinking, and the way to start is also carefully designed. Luo Chuan, this person is by no means a psychopath. Since his mind is clear, there must be a reason why he kills. At the same time, let's focus on the victims, and see what these people of different ages and genders have in common? ”

。 m.