Chapter 217 Blood Curtain Cave

The third brother died in his own house.

This is an apartment in the city center. The area is not large, about 100 square meters, but half of it is open and decorated very luxuriously, like the American luxury apartments seen on TV.

The body of the third brother was lying on the open floor, and next to him was the body of his current boyfriend.

Blood flowed down from the open floor, not only along the stairs, but also from the gaps in the hollow railings on the front of the open floor.

It can be imagined that in the short period of time when the blood was abundant, this luxury apartment in the city center was like a water curtain cave made of blood dripping, and the waterfall composed of blood flowed flatly from the open floor, dividing the room into two.

Even now, there is still sticky blood dripping from the open floor, or simply drawing from top to bottom.

"Did your family ask you to buy a haunted house?" Shou Xiankan is the fat man's master and knows the situation in his family.

The fat man said, "Yeah," and said, "They think that since I often come into contact with corpses, it doesn't matter if I live in a haunted house. And I'm young and have enough yang energy. After living here for a while, the haunted house will get better. When I sell it, maybe I can sell it at the price of a normal house... I firmly disagree, so forget it."

"Not every haunted house is like this." The thin Xiankan looked at the bloody water curtain cave and asked, "Why don't you agree?"

"Because I can't afford a haunted house either." The fat man said, and asked, "Where do we start?"

The thin Xiankan looked at Jiang Yuan and said, "Let's help forensic doctor Jiang."

This is the jurisdiction of Qianjin District, Qinghe City, and the murder case is under the jurisdiction of the Criminal Police Brigade of Qianjin District. The captain is Lei Xin, whom Jiang Yuan had met before.

Lei Xin had worked with Jiang Yuan before because of the case of burning corpses and murders. So, after confirming the identity of the deceased and knowing that Jiang Yuan was working on a related case, he called him immediately.

Now, the technicians in the forward area are sweeping the periphery. The loft on the second floor, especially the corpses, are all left untouched, waiting for Jiang Yuan to come and deal with them.

Jiang Yuan dressed neatly and went upstairs with Wu Jun.

In front of the two of them, transparent acrylic footstools were laid one by one to avoid affecting the scene as much as possible, especially to avoid stepping on the bloody footprints repeatedly.

The four people lined up and walked upstairs slowly.

Two male corpses, naked, covered in blood, lying in a pool of blood.

Thinking of seeing one of them yesterday, the fat investigator's throat itched even more.

"All the bloody footprints must be carefully photographed." Jiang Yuan took a rough look first, and then made arrangements.

Although Wu Jun is the master, he has now wisely stepped down and took the initiative to pick up the camera and take pictures.

At the scene of a murder, the most important thing is of course the corpse, but solving a case does not necessarily rely on the corpse.

Other information surrounding the corpse can sometimes make it easier to solve a case.

For Jiang Yuan, the bloodstains on the scene can bring too much information. He has done the reconstruction of crime scenes many times. With this skill as a foundation, the efficiency of obtaining and organizing information on the scene is too high.

For example, the simplest fingerprint scanning, no scene investigation is to look at it inch by inch.

For large-scale fingerprint scanning, either use the scene investigation light, and shine it on it, and you can see a lot of fingerprints.

But this is mainly used outdoors. There are fingerprints everywhere in the room, and you have to judge which fingerprints are from the victim and which fingerprints are useful fingerprints.

Otherwise, a scene investigator will bring home hundreds of fingerprints, and it will be impossible for the trace inspection to not curse.

A more common method is for the scene investigator to analyze the beginning of the case and guess the direction of the case according to the situation at the scene, and then check the place where the criminal may leave fingerprints.

Just like what Jiang Yuan did yesterday. The most likely place for the thief to leave fingerprints is near the door lock, because he has to take off his gloves to work, and then wipe the fingerprints, which is very easy to make mistakes. As for the indoors, the thief put on his gloves again, so it was meaningless to look for fingerprints.

Therefore, if the murderer's crime process can be determined by reconstructing the crime scene, it will be easier and more complete to collect evidence.

However, Jiang Yuan felt that he could not use this trick at today's crime scene.

He looked at the bloody footprints one by one, and soon had an idea in his mind.

"The murderer is 25 years old, which can be magnified to about 28 years old. The actual height... should be about 170, and the weight is 140 kilograms..." Jiang Yuan found two bloody footprints with better conditions, observed them carefully for a while, and gave a direct conclusion.

The most famous on-site investigation in Qinghe City is Chen Wenming, but he did not come this time.

As a subordinate of Chen Wenming, the fat man's on-site investigation has seen Chen Wenming's footprints, but compared with Jiang Yuan's approach, he just felt that Jiang Yuan was like a god.

All technicians know that some indicators are easy to give a wider range, and if you want to give a narrower one, it requires multiple factors to be considered. It is very difficult.

Jiang Yuan was so confident in coming up with such a series of conclusions that even Fat Kan was a little worried about him.

Wu Jun, however, was used to hearing the common words used by Jiang Yuan to come up with conclusions, and asked, "What does actual height mean?"

"This is the more distinctive feature of this eucalyptus." Jiang Yuan's hands fluttered in the air twice, and he said, "Look at the back half of this shoe print, there is a little bit of dragging feeling, right?"

"What is this?" Wu Jun asked.

Fat Kan, who had been with the footprint expert, blurted out, "A small horse pulling a big cart?"

Jiang Yuan glanced at him and said: "We usually say that small feet wear big shoes, but it means the same thing."

It is relatively easy to wear big shoes with small feet. There are many distinguishing points. In addition to the drag mentioned by Jiang Yuan, there may also be a heavy heel, or virtual pressure on both sides, as well as changes in the center of gravity of the thumb, little finger, etc.

All in all, it is very easy for small feet to wear big shoes. Anyone who reads some books, learns some trace inspection knowledge, or goes to prison to study for three to five years should understand the relevant knowledge. In contrast, if you want to hide shoe prints, there are simpler ways, such as...

"Then this person is a bit stupid. Is he an amateur?" Pang Kan has learned to express the key points in one sentence.

Jiang Yuan shook his head at this time and said: "This person is a little different."

"where?"

Jiang Yuandao: "Look at the outer edge of the shoe print... this person should be wearing height-increasing shoes, and he has small feet wearing big shoes. I think they should be a complete set."

Wu Jun nodded, recorded it, and said: "Looking at the body, there were many stabs on the body, and the force used was very strong. It was unnecessary. It was probably a love killing..."

"Yuan Yutang is probably bisexual. There is also the possibility of a love rival."

"Homosexuals can also have male rivals."

"makes sense."

"However, killing two men by one person, even if you have the key, is very difficult to come in and kill them while they are sleeping." Jiang Yuan stared at the pool of blood on the ground for a while, and then said: "The one who killed Yuan Yutang By then, he had already woken up. The pool of blood here has been washed with water many times. There may be traces of the murderer's blood. Please wipe some more test materials back. "

The blood that has been specially rinsed can only cover up traces but cannot eliminate the presence of DNA. If you want to clean it thoroughly, you have to use some uniquely formulated detergents.

Fatty and Thin now agreed, and they all leaned over and started wiping.

Jiang Yuan continued to stare around for a while, and then said: "The hygiene of the apartment here should be cleaned by someone. I will ask someone later if there are any missing towels in the bathroom."

"You suspected that the murderer was injured and bandaged it with a towel?"

"Yes, look for pillows, sheets and the like. It's possible that he dripped blood somewhere and took one or two items on the spot." Jiang Yuan said and started looking for it himself.

He tried to see if he could find incomplete blood stains, which must have been left by the murderer.

Jiang Yuan felt a little relaxed when he reached this point.

The eucalyptus in front of me gave people the feeling that the element of passionate killing was relatively high.

As for killing with passion, it would be better if it is fatal with one blow. This kind of person stabs someone in person with a knife, and the first stab does not kill him. Later, he stabs him to death under the resistance of the other party, and does not let go, but stabs him with more than a dozen knives. It is very difficult. It's hard not to leave evidence.

In this case, if you want to evade the crackdown and hide the facts of the crime, you must either prolong the discovery of the body so that the biological evidence at the scene will naturally deteriorate. Either dump the body and deep clean the scene.

However, cleaning the scene itself is a technical job, and there is a risk of discovery when the body is thrown away, and the second scene created may not go undiscovered.

From the perspective of criminal investigation, passion murder cases are generally not very difficult.

Participants in passion killings are often reckless. That's why it's called passion. If it doesn't get carried away and the atmosphere reaches the level of murder, normal people with normal thinking will not resort to killing people at all.

After searching around and finding no incomplete bloodstains, Jiang Yuan was not discouraged. He stood up and concluded: "At present, we can check first to see if any of Yuan Yutang's male lovers or love rivals wear height-increasing shoes and large shoes at the same time." A man with a shoe size." Jiang Yuan made an estimate and said, "After increasing his height, this man should be about 180 centimeters tall and have a shoe size of 44."

Wu Jun shouted through the railing: "Captain Huang..."

Huang Qiangmin ran over and asked, "Do you have any clues?"

Jiang Yuan then restated the judgments made by several people just now to Huang Qiangmin.

Huang Qiangmin muttered a few words and immediately said: "I will ask Wu Junhao to come over and arrest people now."

Jiang Yuan then remembered yesterday's thief and asked hurriedly: "Has the thief been caught?"

"Caught, we're under interrogation. He's an old thief, he's a little bit chewy." Huang Qiangmin said, taking out his mobile phone and going to work on his own. "