"The value of this shoe print is also limited." Professor Wu said firmly.

Xiao Meng picked up the photo and looked at it, and then projected the photo onto the projection screen in the office, and said blankly: "This is about a size 43 shoe, from the pattern at the bottom should be a sneaker, this kind of shoes is very common, the migrant workers on the construction site wear this, students, factory workers, etc. will wear this kind of shoes, want to find some clues from this aspect, the difficulty of investigation is indeed very great!" ”

Professor Wu shook his head and said, "That's not what I mean."

Before we could speak, Professor Wu picked up the infrared light and shook it on the projection screen.

Explained: "When normal people walk, they are two-thirds of the forefoot force, if you are more precise, in the traceology, there is a formula, size 43 shoes, the force point is from the heel to the toe of about 20 cm, the deviation will not exceed 2cm, that is to say, as long as the shoes do not fit, only on the wet dirt, the footprints left can completely infer the height and specific information of the murderer, but this footprint does not conform to this trace formula......"

After hearing what Professor Wu said, I took a closer look.

I have to say that Professor Wu is highly respected, has rich experience in handling cases, and is a top expert in forensic science and trace science, so he can see the problem at a glance and all of it is unexpected, which is reasonable.

Xiao Meng measured this footprint, the place where the sole of the foot exerts force, that is, the deepest part of the depression in the wet soil, and the position from the heel, compared to normal speculation, it is obviously wrong!

Wang Jianfei said: "It seems to be at the front." ”

"That's right."

Professor Wu nodded: "If you come forward, it means that the shoes don't fit." ”

I sighed: "And we didn't find any useful clues around, the only clue is this shoe print, and now the shoe print has a problem again, we have to judge that the real murderer behind it is a local, and he has rich experience in counter-reconnaissance, and at the same time, he left shoe prints, which is likely to be intentional!" He is misleading the direction of the police's investigation! ”

"Hmm."

Professor Wu was very excited and said, "I think so too, this shoe print was not found by our efforts, but deliberately left by the murderer for us to discover!" In order to mislead the police, let's go and find the person wearing size 43 shoes! So as to exclude the real murderer from the range of suspects! ”

Wang Jianfei said: "So, how many sizes of shoes does he wear?" ”

Professor Wu said: "37-38 yards. ”

With that, he looked at me, as if to ask me about my speculation with his eyes.

I sighed, and I always felt that there was something faintly wrong in my heart, but according to the information we have so far, we can only analyze so much, and according to the "footprint formula" of traces, within the logical and correct range, it is indeed 37 or 38 size adult men's shoes!

Wang Jianfei frowned: "Generally, male bones develop quickly, as long as they are adults, the size of the soles of their feet has been formed, and the feet of adult men are rarely lower than 42 yards, right?" 37--38 yards, can we understand that it is still a minor? ”

Professor Wu analyzed: "Three possibilities! ”

"The murderer who left this footprint was either a minor, or a noticeably short man, much taller than his peers, or, the third possibility......"

Xiao Meng asked for the first time: "What is the third possibility?" ”

"The third possibility is that our analysis is fundamentally wrong and has no reference value!"

"Poof......

Everyone frowned and fell silent.

However, this group of people engaged in criminal investigation is like this.

It's obviously a multiple-choice question, but it's still a required question, but you have to fill in the options yourself, and in the end, you can eliminate all your original ideas and find the one that is most logical and true!

It's useless, we do it every day.

However, before the truth is revealed, no one knows which is useless and which is useful, and there is no solution to this trouble.

"In other words, all the clues on our side have been broken, and we can only wait for the news of the autopsy over there." Wang Jianfei shrugged and said.

"Hmm," Professor Wu nodded, got up and helped us make a cup of instant coffee, and said, "Finish this cup of coffee, and the autopsy will almost be done, just a head, and it won't take too long." ”

"Well, thank you."

I picked up my coffee and took a sip, and it tasted good.

Ten minutes later, before we could go to the autopsy room to see the specific situation, Xia Xixi had already come over with the autopsy report.

However, judging from the facial expressions, Xia Xixi's mood this time was not very good, and it seemed that it had little effect.

Professor Wu seemed to have been mentally prepared, and without waiting for Xia Xixi to speak, he said directly: "What you find out is what it is, the clues don't care about the size, as long as there is, you can always peel off the cocoon and follow the vine." ”

Xia Xixi put down the autopsy report and told us: "The deceased, an adult male, was about 26-28 years old, with incomplete facial features, his scalp had been stripped off, and the skull had shown preliminary white ossification. The freezing temperature is not very high, minus 5 °, it should be a refrigerator for family use. ”

"What about the time of death?" Professor Wu's speech was very focused.

"Judging from the skin and flesh that were stripped of it, it took more than 72 hours to be thrown into the water, and according to the state of the skull, the real time of death of the deceased, or the time when the entire head was cut off from the body, has been more than a week!"

"It's been more than a week......"

Wang Jianfei was cold, and his eyebrows were twisted into Sichuan characters: "That is to say, the murderer killed a week ago, and then directly chopped off his head, put it in the refrigerator for at least four days, and then chose the glass skin and flesh to throw the body into the moat!" ”

"Yes."

Xia Xixi said: "According to the wound marks on the mandible, it can be judged that the corpse dismemberment tool used by the murderer is very sharp!" It is not an ordinary household kitchen knife, because the kitchen knife will curl the blade when cutting bones, not to mention that the hardness of human bones is greater than that of pork ribs. Each knife is sharp, and the knife goes deep into the bone marrow! ”

"Can you be sure of your identity?" Professor Wu asked.

"The DNA has been made, and Leader Tang has personally taken the DNA results to the public security database and compared them nationwide, hoping to have results."

I let out a sigh of relief, and now I have to wait for news.

DNA can do it, and that's a good direction.

However, it is not necessary that the DNA of the deceased was entered into the database of the public security system before his death, and if not, there is no comparison result, and it can only be said that this clue is broken again.

Wang Jianfei asked, "Have you checked the report records within the last week?" Have there been any reports of missing persons? ”

Xia Xixi said: "There are a total of 7 cases of missing people reported in the city, but 5 of them have been found, and the other 2 cases are reported to be missing women, so this direction is ...... This road is not working! ”

"How can this be ......" Wang Jianfei scratched his scalp fiercely: "A big man, an adult male, twenty-seven or eighteen years old, has a family and a home, it is very likely that he has a serious job, a person with a wife and children, and no one has called the police for seven days since he disappeared?" Isn't that counterintuitive? ”

Professor Wu nodded: "I can only wait for the comparison results."

At this time, Tang Yu happened to come back with the comparison results.

Everyone's eyes were on her.

However, Heaven never seems to favor our toil.

Tang Yu said: "I regret to tell you that there is no mild DNA arrangement in the database of the public security system, so we have no way to determine the identity of the deceased through DNA." ”

"Damn!"

Wang Jianfei couldn't help but burst into a foul mouth: "Doesn't this mean that all the clues are broken?!" ”

Tang Yu nodded: "For now, that's the case." ”

However, after saying that, they all seem to have a kind of magic, no matter what the case is, every time when all the clues are broken, everyone will look at me.

Sure enough, Professor Wu, Wang Jianfei, Xia Xixi, Tang Yu, including Xiao Meng, looked at me and said in unison: "Brother Xiao Ye, what do you think?" ”

Me: "......"

I was speechless.

However, speechless is speechless, and there is still a point of view.

I cleared my throat and put down my coffee cup: "We analyzed before, the murderer's shoes were very large and did not fit, and it was very likely that he was a minor, but how could a minor have such a mind and be able to slash and kill an adult with a knife deep into the bone marrow, first kill people, then divide the body, then freeze, and finally throw the body?" It's not just about whether the psychological quality can bear it, but also the labor intensity of this work, which should also be regarded as individual work, right? ”

"What do you mean......" Professor Wu's eyes suddenly lit up and he shivered.

"That's right!" I snapped my fingers: "It is very likely that there is more than one murderer, and even, let's boldly speculate, it is very likely that the father and son are working together to commit the crime!" The father's shoes are size 43 and the child's shoes are size 37! The child's mother is no longer there or has been divorced a long time ago, and the child has grown up with his father, and has a dull personality, is withdrawn, very homely, and does not go out often...... Even the pimples on his face look a little sickly...... He doesn't like to communicate with people, and he doesn't like to talk to strangers, his heart longs for attention and affirmation, but the whole world seems to treat him as a stranger, his father is likely to be an alcoholic, but he has some experience in counter-reconnaissance, is familiar with the terrain of this generation, and is most likely a regular worker......"

Xia Xixi was full of praise after listening to my portrait: "You are becoming more and more like a top psychological portraitist!" ”

I said, "I'm not scribbling out of thin air, I'm an artist." ”

Tang Yu nodded angrily: "Yes, yes, artist, can you tell us again, where is the murderer?" ”

I shook my head: "I don't know, but other than that, I can be sure of one thing, and that is ......"