"I don't rule it out." Yan Zhongxin said: "Judging from the scene, the murderer's methods are extremely cruel, even if it is revenge, such an act can be said to be a complete perversion, and it is not impossible for him to return to the scene to find satisfaction after he has not committed the crime." ”

After a pause, he added: "What's more, there may be a murderer hidden among the onlookers below." ”

Xun Mu bowed his head slightly.

"Let's not mention these for the time being, from the perspective of forensic medicine, I have a few suggestions for the next direction of investigation." Yan Zhongxin diverted the topic again and said:

"The first is the murder weapon, as I just said, judging from the broken section of the corpse, the murderer should have broken the corpse with a cutting machine, this thing is not available in every household, and the other is a homemade electric baton, which is also an important directional clue, and to some extent unique."

Xun Mu hummed and asked, "What else?" ”

"Second," Yan Zhongxin continued, "judging from the scene, the victim's family should have been eating when they were killed, and there were not many signs of a fight at the scene, so I deduced that the murderer should have entered the house directly, and then before they could react, he broke out and injured people, and knocked them all out." ”

"An acquaintance committing a crime?" Xun Mu reacted immediately.

"It is very likely," Yan Zhongxin bowed his head, and added: "Of course, it may also be that the victim's family habitually does not close the door, and they were still a little confused when the murderer first entered the house." ”

Xun Mu pondered for a moment, and then asked, "Is there anything else?" ”

"One more point, about freezing." Yan Zhongxin also said: "Judging from the corpse surface, the corpses of the five people were completely frozen before they were divided into several large body pieces, and then neatly piled up. ”

"Freezer?" Xun Mu immediately asked.

"And it's a fairly large freezer, with an interior that is at least one meter eight long, one meter wide, and half a meter deep, with a volume of nearly a thousand liters." "A 1,000-liter freezer is too exaggerated, so I prefer cold storage. ”

Xun Mu reacted: "What do you mean...... The victim's body was frozen, and it was not carried out at the scene? ”

"Hmm." Yan Zhongxin said: "The corpse has been transferred at least twice, once transferred out and once transferred back, and after being transferred back, it was cut, adhered to, and piled up. ”

"It's weird," Xun Mu frowned and wondered, "What does the murderer want to do?" Doesn't this greatly increase the likelihood of exposure? What's the fuss? ”

"I don't know." Yan Zhongxin shrugged: "This mystery can only be solved by you." ”

Xun Mu sighed.

After thinking about it, Yan Zhongxin said: "That's pretty much it, I can't think of anything else to add for a while...... I'll pull the body back for further examination, and if you have any questions, feel free to call me again. ”

"It's fine." Xun Mu bowed, then took two steps back, and let Yan Zhongxin and the others leave.

In this way, only trace inspectors are left in the scene.

After thinking for two seconds, Xun Mu also put on protective clothing, walked into the scene, squatted beside Lao Wei, and asked, "Lao Wei, how is it, did you find anything at the scene?" ”

Lao Wei raised his head and glanced at him, and then shook his head slightly: "The scene is too chaotic, all kinds of traces overlap, the layers are very complicated, and it is not a small trouble to extract, and it is currently being carried out." ”

After a pause, he raised his hand and pointed to a line of blood footprints not far away, adding: "But at present, it is basically certain that this group of blood footprints was left by the suspect."

I made a detailed analysis of this set of footprints, and roughly determined that the murderer should be between 1.79 and 1.82 meters tall, with a very positive gait, roughly in a line, with an unusually well-proportioned stride, and the whole soles of his feet landed, but in general, his gait was relatively light and light......

Judging from this, the suspect has a small weight base, and will subconsciously control his stride length and landing position, and may be a running enthusiast or even a professional long-distance runner. ”

Xun Mu raised his eyebrows: "Can you see this?" ”

"Guess, seventy percent sure." Lao Wei said: "Most of the modern people's walking gait is actually more or less problematic, and they may not be able to see it when they usually walk, but once they run, it is obvious."

In the same way, after the running enthusiast corrects the running posture, the usual walking gait will also be affected and subconsciously produce certain changes, focusing on the stride length, foothold and foot posture adjustment after landing.

And in addition to the footprint itself, the sole pattern also gives us many hints, the pattern style can indicate the type of shoe or even the brand, and the degree of wear and tear of the pattern combined with the degree of edge defects can indicate how old and old the shoe is and how much exercise the suspect has.

For example, you see, here, here, there, and this tooth in front of us reminds us that the suspect often runs on the road, and there are many steps in the habitual trajectory of road running......"

Xun Mu immediately came to his senses and stared carefully.

But he could easily keep up with Lao Wei's train of thought in the front, after all, he had also learned these things in the police academy back then, but he began to be confused when he got to the end.

When Lao Wei talked about it in depth, and even extended some very complex concepts and a series of regression equations, Xun Mu began to listen to the clouds, and even had a feeling of a liberal arts student listening to a math class - how did the math teacher TM conjure a number from a bunch of letters?

The key is these conceptual definitions, he has almost forgotten them, and only remembers some relatively basic application aspects, plus Lao Wei is really not a good teacher, many key places are directly skipped this and that, Xun Mu can't keep up with the train of thought at all.

Slowly, Lao Wei also saw that Xun Mu couldn't keep up with the rhythm, so he simply stopped explaining, shook his head and directly said the conclusion that he had just said: "The murderer is a running enthusiast, the amount of running is not small, the exercise intensity is quite large, he should be very strong, it is likely that he has participated in the whole marathon several times, and the results may be good." ”

After a pause, he continued to add: "And the pair of running shoes he wears is also particular, I speculate that they should be professional support running shoes, not common cushioned running shoes, and considering that the murderer should be relatively professional in running, he will not make the mistake of choosing the wrong running shoes......

Xun Mu asked blankly: "What are the supporting running shoes?" ”

"Isn't that what I'm going to say?" Lao Wei shrugged, and then continued: "Cushioned running shoes are relatively common, and their main function, as the name suggests, is to provide cushioning to protect joints, including ankle and knee joints, and are suitable for most people and those with relatively large body weights.

The support running shoes are the concept of relatively cushioned running shoes, the main purpose is to support the word "support", which is aimed at runners with low arches and flat arches, so as to avoid damage to their feet and play a role in correcting their running posture.

Therefore, it is speculated that the murderer should have low arches or even flat feet, and at the same time likes to run, has a relatively large amount of running, and has a relatively small weight base. ”

Xun Mu immediately wrote down these clues, and then raised his eyebrows and said, "Okay, Old Wei, you can be regarded as having made a great contribution this time." ”

Lao Wei waved his hand: "It just so happens that in the case of the murderer this time, we have more room to play, which is normal." ”

Xun Mu praised him again, and then asked again: "Has the perpetrator been confirmed to be one person?" ”

"Confirmed." Lao Wei nodded, and then said: "The order is also roughly guessed - after the murderer entered the room, he took the lead in electrocuting Lu Anran, who was in his prime, followed by Lu Zhaoshan, then Fang Hui, Mei Wenxin, and finally the youngest daughter Lu Qing.

During this period, Lu Zhaoshan and the others naturally did not sit still, they struggled, but it had no effect, and they were quickly subdued, and in the process of scuffle, they lifted all the dishes on the dinner table to the ground. ”

Xun Mu glanced sideways, and sure enough, there were a lot of rotten meals on the ground, and the meals were already dry and yellow.

"It seems that the murderer has no intention of cleaning up the scene at all." Xun Mu pouted.

"Indeed, there was no trace of cleaning at the scene, and the only subconscious clean-up action was that the murderer rubbed the mat twice on the mat when he finished breaking the corpse and piling up the corpse and went out, wiped the blood, and then threw the mat back into the room." 老魏 says:

"Moreover, the murderer bought quite a lot of sealing rubber rings, cut and pasted them in the scene and installed them on the cracks of windows and doors one by one, and used a large amount of foam glue to block the vents of range hoods and bath bombs to prevent the smell from coming out."

Seeing Xun Mu write down this information, Lao Wei continued: "This is also very strange and contradictory.

Judging from the situation at the scene, and the fact that the murderer took the body out of the scene to freeze it, and then brought it back to the scene to cut and pile it up—these are what the old man told me—and did not clean up the scene at all, he was quite rough in the whole process of the crime, and he did not care about taking the risk of being exposed.

But on the other hand, if the scene is completely sealed, if it is really to avoid the smell of rancidity, it is obviously delaying the time of the case, and consciously trying to avoid the exposure of the case...... It's very contradictory. ”

"These contradictory behaviors and phenomena, freezing and cutting to pile up corpses and sealing the scene, may have some special meaning for the murderer." Xun Mu thought for two seconds, then said softly: "It shouldn't be a simple pervert or obsessive-compulsive disorder or something, but to get some kind of more complex satisfaction." ”

Lao Wei's mind was racing, and he asked tentatively: "For example, the victim has also done similar things to the murderer's family?" ”

"You're going too far." Xun Mu rolled his eyes, then shook his head and asked, "Is there anything else you have discovered?" Like fingerprints or something? ”

"I haven't had time to verify it yet, but I'm afraid it's mysterious." Lao Wei said: "You see how many bloody fingerprints are on the wall and on the coffee table, what can you find?" ”

Xun Mu stood up and looked at it twice, then frowned: "Rubber gloves? ”

Old Wei spread his hands.

But then he added: "But while fingerprints are unlikely, there is hope for other biological clues — because the killer apparently stayed at the scene for a long time, going in and out several times, and not cleaning the scene at all." ”

Xun Mu snorted, nodded slightly, and then asked: "When the murderer committed the crime of killing the deceased and cutting the body of the deceased, the movement should be not small, right?" ”

"That's for sure." Lao Wei said without thinking: "He didn't subdue several victims at the same time in an instant, and the victims would inevitably shout when they struggled."

In addition, when cutting frozen corpses with a cutting machine, the noise is probably no less than cutting steel bars, and it stands to reason that the surrounding residents must have heard the movement, so we may be able to determine the specific time when the victim was killed in combination with the visit. ”

After a pause, Lao Wei pointed to the pile of food on the ground again, and then said: "In addition, I have a different opinion about the time of death - the corpse has been chopped up like that, many signs cannot be counted, and it has been frozen, and the interference with the judgment of the time of death is even heavier, and it is difficult to get an accurate value from a simple autopsy......

Xun Mu raised his eyebrows: "So you propose to directly inspect these meals?" ”

"That's what I mean." Lao Wei said: "Lao Yan also agreed, packed up some food and went back." ”

"Then why are you talking to me about this?" Xun Mu was a little puzzled.

"But just now I noticed something was wrong." Lao Wei pursed his lips: "These meals, there is a problem, after Lao Yan took away the meals on the upper floor, he exposed these meals on the lower floor...... There is a big difference between the two. ”

"Oh?"

"Lao Yan took away the fried vegetable oil, and after the meal cooled, it would not solidify at low temperatures." Lao Wei said: "And the ones below should be fried in lard, and you can clearly see white clots."

I don't think you need two oils to fry the same dish, right? Even if two oils are used, they will not be separated so obviously, and both dishes have vegetable oil and lard...... And I just looked at it, and the victim did not have vegetable oil in his house, only lard and butter.

In other words, the meals on the upper floor, obviously, should have been poured by the murderer, so I suggest that the rest of these meals should also be collected and brought back to Lao Yan. ”

"Deliberately poured a meal on it?" Xun Mu's eyes narrowed slightly: "What is the murderer doing?" ”

"I don't know." Lao Wei pouted: "Anyway, the more I investigate, the more speechless I become, the murderer's bewildering behavior is not ordinary, the ghost knows what he thinks, and he can't guess the logic of his inner behavior." ”

Xun Mu sighed: "Forget it, if you can't guess it, don't guess it first, check it step by step and find out the murderer, and then ask him directly about these things that you don't understand." ”

"That's all it can be." Lao Wei stood up, sighed again, and shook his head: "The feeling this case gives me...... It's very weird, it's weird everywhere, and it's not very good, it's weird and uncomfortable.

No, Team Xun, you say, the murderer shouldn't be really a psychopath, right? ”

Xun Mu rolled his eyes: "How is it possible, although his various behaviors seem contradictory and weird, but they are also planned and organized, which psychopath can do this?" ”

"That's not for sure, you don't understand those guys at all, many psychopaths are not stupid and crazy, but their behavior patterns and thinking logic are different from ordinary people."

Hearing him say this, Xun Mu couldn't help frowning.