Miss Du is still young and petite, and she always giggles when her close friends get together, and she usually looks like a child who doesn't grow up, but she didn't expect such a cruel and terrible encounter!

Xu Xinyi is very arrogant on the outside, but extremely warm on the inside, even if he doesn't have a deep friendship with Miss Du, he was so angry that his apricot eyes were wide open, his willow eyebrows were upside down, his hands couldn't stop shaking, and his chest rose and fell rapidly due to rapid wheezing.

A calm and powerful hand fell on her shoulder, and Qin Lin's voice was low and hoarse: "I promise, the culprit will be caught, and Ming Zhengzheng will be punished!" ”

His eyes burned with deep flames, and his expression was as calm as that of a selfless judge of hell, giving an absolutely unquestionable verdict in a calm tone.

To be precise, his expression is very gloomy and terrifying now, but Xu Xinyi only has 100% trust in her heart, she believes every word Qin Lin says - if the criminal is an evil ghost who kills living beings, Qin Lin is the Yama who is in charge of the dark hell and punishes the evil in the underworld, no matter how cunning and deceitful that evil ghost is, it will not be able to escape the soul of the Senluo Palace!

Under Qin Lin's encouraging gaze, Xu Xinyi calmed down, wrapped his hands in cloth, and pulled out the stick that had pierced the girl's body with a trembling voice.

The stick was not treated, it looked like the murderer had broken it off from somewhere, it had already been soaked in blood, and the delicate parts of the corpse were poked by it.

Qin Lin frowned when he looked at it, and his hatred of the criminal increased by three points: all kinds of signs showed that the stick was forcibly pierced before his death, this criminal was so despicable and so ferocious, he was really inferior to a beast!

However, the results of the next examination were different from the previous two times, Xu Xinyi carefully searched between the deceased's blood-covered legs, but did not find the jelly found on the corpses of the previous two cases.

"Something is wrong......" Qin Lin touched his chin, thoughtful.

Xu Xinyi and Lu Yuanzhi both looked at him blankly, and after waiting for a while, they didn't see him speak, but Miss Xu spoke first: "What, didn't you say that the criminal methods would escalate?" It does look more brutal than the first two. Damn, that's a bastard! ”

"There is an upgrade, but," Qin Lin thought for a moment, and carefully explained his doubts.

Generally speaking, serial murderers receive strong stimulation and positive feedback in the process of committing crimes, and the degree of distortion and perversion of their personalities will be further deepened, and the phenomenon of crime escalation often occurs, such as the case from freezing to death to drowning and then escalating to strangulation, the criminal's means are becoming more and more direct and effective, and the "satisfaction" brought by the victim's struggle to death to the criminal's distorted heart is also getting stronger and stronger, which is in line with this inference.

However, some specific methods of committing crimes will not change, because serial murderers are inherently psychopathic, and most of them have the psychological characteristics of extreme paranoia, and if they are asked to change their methods of committing crimes, it is even more uncomfortable than killing them.

For example, Qin Lin once handled a classic serial murder case in the past, the murderer killed nine innocent female surnames, eight of them died by cutting their necks with a sharp blade, and the remaining one girl was strangled to death, what is the reason for this?

After the trial, it was ascertained that the criminal had witnessed his neighbors killing sheep many times when he was a child, and of course he used the technique of slaying his neck with a knife, which left a very deep psychological imprint on the criminal, and since then he subconsciously believed that "only by attacking the neck can it be completely fatal", so he used a knife to cut his throat every time to commit the crime.

The only time he strangled and killed was because he accidentally did not carry a knife, but his psychological trajectory was still reflected in the means of committing the crime: if there was no knife, he was strangled with a rope, and the attack site was still the victim's neck!

Back to the current series of serial murder cases in Nanjing that led to the murder of three female surnames, the first two cases both appeared with broth jelly, why didn't the third case appear?

"Isn't it the same person who committed the crime?" Lu Fatzi hesitated, and finally asked a question.

Xu Xinyi immediately retorted: "It shouldn't be, it's obvious that this one also used drugs." ”

Qin Lin nodded approvingly, Xu Xinyi's reasoning was correct.

Like the first two deceased, there were no traces of binding on the wrists and ankles of Miss Du's body, and you must know that even if she was delicate, the great pain of being so ravaged and delicate pierced into the rough sticks would cause the victim to burst out with far more strength than usual, and there would be a violent struggle, even if the criminal was a strong man, it was impossible to easily subdue him.

At the same time, there were no traces of blood or human tissue found between Miss Du's fingernails, indicating that she had not been able to make effective resistance at all, so there was no other explanation than prescribing drugs.

In order to confirm that he had done an experiment with a dog again, Qin Lin turned the body upside down and pressed his abdomen to make it vomit out part of the stomach contents, and the dog immediately lay down on all fours after eating.

The bruises and pinching marks all over the body, and the use of drugs to commit the crime, all prove that the deceased was indeed killed by the vicious serial murderer, and that the second criminal imitated the crime with very little surname.

Why was the broth jelly left on the first two occasions, but not this time? This is a visible beacon of criminal minds!

There is no doubt that the murderer used meat jelly instead of J liquid precisely because he did not have the ability of a normal male surname, and he left this thing on the corpse, subconsciously telling himself: I have obtained her, I have completely and completely possessed her, and exercised the power of the male surname on her.

If the criminal is a woman, then the meat jelly represents insult and belittlement, no matter how beautiful and moving, gentle and elegant, pure and lovely the victim, the criminal uses meat jelly instead of j liquid to smear, imagining that it has been truly defiled, and from then on, all her advantages have been erased and become a broken shoe of ** humiliation.

Regardless of the former or the latter, the application of meat jelly is an essential procedure, even for paranoid criminals, more "meaningful" than the killing itself.

So, why didn't he continue to use jelly? You must know that in this case, in the eyes of the criminal, the case is no longer "perfect", which is quite uncomfortable.

Could it be that he or she is too late to use the aspic because of the time constraints? And in the first two cases, there was no "murder weapon" left on the body, but this time there was an extra stick...... Qin Lin scrutinized it carefully, his eyes as sharp as a knife examined the corpse like a scanner, not letting go of any suspicions, leaving no omissions.

There is a faint feeling of discomfort -- this is the unique intuition of criminal investigation experts, if the case is reasonable, they will feel "comfortable", if it is abnormal, they will be confused because of the strangeness.

Finally, Qin Lin found what made him "uncomfortable": in the first two cases, although the deceased was covered in bruises, it represented the characteristics of a woman's surname, and it was also the door where the criminal deliberately "insulted" or "possessed", and there were no obvious scars, only meat jelly; But this time, the meat gelatin was gone, but it was poked to shreds by the rough sticks, and the damage was very different from the previous two times.

The injuries on the deceased's body in many places covered up this, and the previous inference that Qin Lin had escalated the crime had also made Qin Lin not pay enough attention to it, but now that he thought about it, he felt that something was not quite right.

The private parts of the victim's female surname must have a specific psychological significance for the criminal, and this beast's first two crimes are clearly reflected, and the mentality belongs to the "possession" of the criminal with the male surname or the "insult and debasement" of the criminal with the female surname, but this time, the performance is closer to pure "destruction".

Generally speaking, serial murder may be accompanied by the escalation of criminal methods, but it is unlikely to shift in specific psychological signs, such as the serial murderer who cut his throat with a knife that Qin Lin caught, because of the subconscious imprint of "only by attacking the neck can be completely fatal", even if he does not carry a knife, he will strangle and kill people, and will never switch to using a hammer to hit the head, poison, arson or other means.

"Could it be that a novice committed the crime, and the psychological characteristics have shifted?" Qin Lin scratched his scalp and put this matter aside for the time being, he had to deal with other things.

Because the corpse was still very warm when it was found, Qin Lin checked the temperature of the corpse, the corpse zombie spots and other phenomena, and determined the time of death to be between half an hour and an hour.

This is also consistent with the statements of several maids.

Miss Du is not as introverted as Miss Yin, what emotions often can't be hidden, this afternoon to the back garden to play, she seemed very excited, first stayed in the study for a while, and after dinner, then went back to the study, and told the maids not to disturb.

It wasn't until a little later that several maids held lotus seed soup and called the door outside the study and no one answered, so they panicked, opened the door and saw that it was empty, and hurriedly searched everywhere, and soon found Miss Du's body at the corner of the courtyard wall and near the side door!

This side door is connected to the back door of the study, and the key is in the hands of an old woman, but this afternoon, Miss Du has to keep the key by herself on the grounds that she will go out to the poetry meeting tomorrow morning.

In other words, like Miss Yin, she went out and was killed by herself!

"Damn, does that criminal have [***] soup?" Niu Dali couldn't help but scold.

Hearing this, Lu Yuanzhi, Han Feilian and Xu Xinyi shouted at the same time: "In the study, maybe there will be clues left!" ”

Of course, Qin Lin immediately led everyone to the study to check.

Compared with Miss Yin's boudoir, Miss Du's study is much more playful and cute, leaving traces of a girl's life everywhere, but Qin Lin and the others couldn't care about sighing and sighing, and immediately plunged into the intense and meticulous search work.

Lu Yuanzhi, who was in charge of the desk, found that the gap between the big inkstone and the desktop was relatively large, and immediately moved the inkstone away, revealing Fang Sheng stacked underneath: "Found it, found it!" ”

Everyone was overjoyed, but they didn't expect the clue to come so easily this time.

However, no one expected that after Fang Sheng was opened, everyone's faces became extremely strange.

In black and white, Juanxiu's handwriting was written clearly: "Parents, the child is going to catch the wicked person who killed Sister Yin, don't worry, there are a lot of soldiers and horses brought by Sister Xu!" ”

(To be continued)