Chapter 342 Restoring the Scene (Part 4)

"Okay, I can't help you," Han Xu had no choice but to raise his hands and surrender under the two men's attacks.

Li Le was a little reluctant, "Let me talk about Han Xu, how did you come up with this method?"

Han Xu explained with a smile, "It's actually very simple. It would be nice to have a little more sense of immersion."

"A sense of substitution?" Li Le said in surprise, "I think my sense of substitution is quite good!"

Chengzi remained silent. This kind of thing was considered to be beyond the scope of the exam, so there was no need to think too much.

Han Xu saw that Li Le was determined to get to the bottom of the casserole and replied with a smile, "Not only do you have to take on the perspective of the murderer, but you also have to take on the perspective of the victim! In layman's terms, you have to switch back and forth between the two. !”

"Damn it, isn't that crazy? I can't think straight!" Li Le curled his lips, a bit confused about this thing.

Han Xu simply stopped talking and continued to explain, "In fact, the splattered blood stains left at the scene can already explain the circumstances of the crime very well."

As he spoke, Han Xu rummaged through his bag and found a few photos, which captured some of the blood stains left in the corridor from different angles.

Li Le and Chengzi took it from Han Xu and looked through them one by one.

The bloodstains in those photos looked messy, but actually showed a rough outline pretty well.

Li Le compared it carefully, but still couldn't figure it out. He couldn't help but look at Han Xu in confusion.

Han Xu selected a few pictures from the photos and pasted them one by one in the corridor where blood had been spattered.

"With all the blood stains, no one noticed it?" Cheng Zi asked casually.

Li Le glared at Cheng Zi and said, "The murderer must have cleaned up the area. Look at the blood stains in the photos, don't they all glow with blue fluorescence?"

Luminol, also known as luminol or photosensitizer, is a relatively common luminescent chemical reagent that emits eye-catching blue fluorescence when mixed with an appropriate oxidizing agent.

In forensic medicine, luminol is usually used to detect trace amounts of blood contained in crime scenes. In criminal investigation, luminol reaction, in layman's terms, means that at the crime scene, as long as there is blood splashed and stained on any object, No matter how it is cleaned up afterwards, as long as it is sprayed with luminol reagent and observed in a dark environment, the place where the blood was originally stained will show blue-white fluorescence due to a related reaction.

Of course Orange knew that these blood stains had been treated with luminol reagent, but he was just wondering about another question.

Han Xu understood what Chengzi meant, "He wanted to say, where did the murderer find the time to deal with these blood stains!"

Li Le was startled when he heard this, "Yes, it's not easy to clean up these blood stains! The ones on the floor are fine, but look at the ones on the wall. If you want to clean them up, it will take some time, right?"

Could it be that this guy killed someone and carried a wall-scraping tool with him, and could he handle it so cleanly? It's obviously illogical. "

Han Xu picked up the photo again and observed it for a while. Just as Li Le said, the blood stains on these walls were indeed treated quite cleanly.

"Has the murderer ever been in this business?!" Chengzi couldn't help but think of the professional aspect, otherwise it would be difficult to explain these doubts.

"This possibility cannot be ruled out. At least the murderer had all the processing tools ready before taking action." Han Xu turned his eyes to the stairwell not far away.

"Holy shit, you mean to say that the murderer had already realized that so much blood would be spilled, so he prepared the tools in advance and hid them in the stairwell so they could be easily accessed and used?" Li Le felt a little out of his mind. Feeling numb, "Oh, this murderer can't even be described as a pervert!"

Seeing both of them looking towards the stairwell, Chengzi subconsciously walked over and opened the door, took a look inside, then shrugged and spread his hands, "Nothing!"

"It's been so long, it's like seeing something ghost!" Li Le said angrily.

Chengzi didn't mind at all, but his eyes fell on Han Xu, "With these blood stains, can you deduce what happened at that time? Why can't I see anything?"

Li Legang wanted to criticize Chengzi again, but when he looked at these photos, he was also confused, so he had to give up.

Next, Han Xu had no choice but to come to an on-site teaching and explain in detail where the murderer stood and swung the knife to cause the victim's blood to splatter on the scene.

There are also a lot of professional terms mixed in, and even some mathematical models are involved, which is difficult to understand!

Li Le and Cheng Zi sounded like they were reading from heaven. They were both listening to someone talking incessantly in class with shocked and numb expressions on their faces, and their brain cells died batch after batch.

Han Xu explained for a long time, but Cheng Zi and Li Le still looked confused. He understood that it was just a joke, so he simply made a summary.

"The result is like this, do you understand?"

Li Le and Chengzi shook their heads in embarrassment, "Hey, I understand, I understand!"

Damn it, I'm so blind!

Han Xu was completely defeated by two ignorant guys!

Finally Chengzi said, "Anyway, you just need to understand. There are specialties in the art industry. Even if you explain it a hundred times, I may not be able to understand it."

Li Le curled his lips and asked in confusion, "I mean, Team Leader Han, where did you know these things? Isn't it too profound? Isn't this thing beyond the scope?"

"I said I learned it on TV, do you believe it?" Han Xu chuckled and looked at him.

"Now I believe everything you say!" Li Le rubbed his back teeth, "For example, the sun will rise from the west tomorrow. As long as you say it, I will believe it unconditionally!"

Chengzi felt that this line seemed to be his own, frowned, and was very unhappy.

"Come on, you two are just ignorant, and you still have the nerve to say it!" Han Xu ignored them, but squeezed Li Le aside and stepped into the room where Dong Shushu had rented.

Li Le and Chengzi were about to say something else, but the people were gone, so they had to follow someone and were ready to continue nagging at any time.

After Han Xu entered the entrance, he began to look at the layout of the entire room.

The structural layout here is not much different from that of Li Hongwei's home. It is also very cramped and the space is extremely small, but if one person lives there, it is quite spacious.

Even though it has been so long since the case, the furnishings and layout inside seem to have not changed at all.

It seems that the landlord Mrs. Li did not dare to move these things casually!

As for the deceased Dong Shushu's belongings, the valuable ones are still kept in the police station's evidence room, and the worthless ones have been taken away by Dong Shushu's relatives.

So the whole room seems particularly deserted, without any human presence, and you can even smell some moldy smell...