Meng Yuan stopped caring about his shoelaces. He stood up suddenly and looked at Sun Yu, "The murderer knew the third and fourth deceased?"

"Strictly speaking, if she is a woman, she should know her." Sun Yu emphasized.

As if he was afraid that this inference would shock Cao Qin too much, Sun Yu comforted him, "Ten years ago, there were very few female serial murderers in Sanjiang Province. In addition, the forensic doctor gave an inference. It is normal that you have never reflected on this detail.

.”

Cao Qin looked at Sun Yu in disbelief, then at Ma Youran, and then at Sun Yu, "Did you think the murderer was a woman from the beginning?"

Sun Yu shook his head, "If I could be sure that the murderer was a woman, wouldn't I have given any profile? Although I couldn't be sure that the murderer was a woman, I couldn't be sure that the murderer was a man."

"Why, why?" Cao Qin asked in surprise, all the information about the case flashed rapidly in her mind.

She has been following this case for ten years, and she remembers all the details clearly. How could there be any doubt about the gender of the murderer?

Sun Yu said: "Didn't you notice the black plastic bag used to dump the body? It is a large high-density plastic bag. In addition to being strong, it also has a large capacity..."

With that said, Sun Yu stood up and came to the whiteboard, where he drew two lines assuming they were river channels.

Dong Liqiang is 1.7 meters tall and very thin, less than 120 kilograms. Sun Yu estimated that if used to hold those corpses, four would be enough. Five would be more than enough. It would be a waste to hold six.

Black plastic bags were found at different locations in the river, proving that the murderer threw the body parts in his hands at intervals along the river.

You know, dumping a body is very risky. What if you are discovered? Why do you need six times if you can do it four times?

"The only explanation I can think of is that the murderer was not strong enough and had to throw the body separately," Sun Yu said.

Cao Qin swallowed her saliva. She had to admit that what Sun Yu said made some sense, but it didn't seem to have anything to do with criminal psychology?

Seemingly seeing Cao Qin's doubts, Sun Yu smiled helplessly, "I rarely use criminal psychology now. It was precisely because I began to pay attention to the reasoning logic of traditional criminal investigation that I discovered these problems.

There are also two people whose throats were cut. Have you noticed that the people whose throats were cut died on the spot and were not moved?

One possibility is that the murderer did not intend to move the deceased's body, but wanted it to be in a conspicuous place in the alley. Another possibility is that the murderer did not have the strength to move the deceased!"

Cao Qin suddenly felt like she was in another world, as if all the inferences engraved in her mind were false.

"That's wrong!" Xia Lan wondered, "If the murderer is very weak, what about this case?"

In this case, the two deceased persons had a large amount of drugs in their bodies, and it has been determined that they were taken orally.

After the deceased was knocked unconscious, he was brought to the lawn of the park, to be precise, the inner part of the lawn.

There are many footprints near the site, but because these lawns are trampled by passers-by during the day, they have no reference value.

However, the police only found footprints at the scene, no tire marks from the cart, and no signs of dragging heavy objects over the lawn.

In other words, the murderer should have carried the deceased to the scene of the crime.

This is completely contradictory to Sun Yu's inference just now.

"Then the murderer is still a man?" Meng Yuan was also brought into thinking about the issue of men and women, and he immediately denied himself, "But if it was a man, some things were indeed as unreasonable as Brother Yu said ten years ago.

"

At this moment, everyone finally understood what Ma Youran just meant.

No wonder she said that without this case she could barely give some profiles.

"To be honest, I'm still not sure whether the murderer ten years ago was a man or a woman. After all, those details may have been deliberately disguised by the murderer." Sun Yu looked at Ma Youran as he spoke, "What do you think?

Was the murderer ten years ago a woman?"

Ma Youran blinked, "Do you believe it when I say it's intuition? I got the intuition after listening to Captain Cao talk about the case ten years ago."

"Talk like a human being!" Sun Yu rolled his eyes, knowing that Ma Youran must have made his own discovery.

Ma Youran stuck out her tongue, "Three of the four deceased were gangsters in society. If the murderer can appear next to them, he must have strong communication skills.

The police investigated the social relationships of the deceased and found no intersection or suspicious people. If the murderer was a man, he must be a gangster, and it is impossible to find no trace.

The only possibility I can think of is that the murderer is a very beautiful girl, and she is not a gangster in society."

Unfortunately, this inference was rejected in this case.

Sun Yu lit a cigarette and looked at the whiteboard beside him.

Before coming here, when he heard that two murders occurred in succession and Cao Qin, the person in charge at that time, asked the special case team for help, Sun Yu thought that this must be a continuation of the case ten years ago, but now even he is not sure.

.

"Could it be that the murderer this time is not the same person as before?" Cao Qin was gradually convinced.

After listening to Sun Yu and Ma Youran's opinions, she also preferred that the murderer ten years ago was a woman, but the murderer in this case must be a man!

Sun Yu picked up the pen again and wrote on the whiteboard.

The first line of text is copycat crime.

The murderer this time is a copycat. He knows the case ten years ago and knows many details. Then he must be a participant in the case or a family member of the victim. This is easy to investigate.

The second line of text is disguise.

This is very scary.

The murderer played a big game when he committed the murder ten years ago. He left behind a portrait of the criminal that did not belong to him, and now he has come back with a different portrait.

If this is the case, the murderer has a certain degree of research in criminal psychology or criminal investigation and has a typical anti-social personality. He is provoking the police.

Then, Sun Yu drew half a brace to surround these two lines, and wrote the word "ten years" outside the bracket, followed by three big question marks.

Xia Lan is right, no matter what, the time span of ten years is indeed a question worth pondering.

No matter who the murderer is, this time point of ten years is the top priority of the investigation.

It's not that we need to investigate what happened in the past ten years, but what happened to the murderer in the near future ten years later.

Ten years is too long, and it can even allow a murderer to truly redeem himself, so without some major changes, the murderer will definitely not kill suddenly.

Suddenly, Sun Yu had an idea. His eyes widened and he hurriedly wrote three words on the third line.
Chapter completed!