Holtz's exclamation was heard inside.

Everyone was mentally prepared.

Go in again.

They were still shocked by what they saw.

As far as the eye could see, there was a fluorescent blue light.

Everyone's exposed skin is reflected in a dark blue color, which is deep and slightly weird at the same time.

"What the hell happened here?" , the only female forensic shrugged her throat: "Did the murderer directly use the blood as water and use it to mop the floor?" ”

It's a rare big scene.

Even these well-informed forensics were in a state of stupor.

Dean didn't feel anything.

After glancing around, he showed a puzzled look: "These marks seem to be really caused by a mop, but in this case, what is the purpose of the other party?" ”

Although it is difficult to completely clean up the traces left by blood, it is more troublesome to clean up the traces of blood everywhere.

"The murderer is cunning and smart."

Holtz's expression was not very good-looking.

He took out a laser pointer from his pocket, clicked it a few times in the area with the most blue light on the ground, and looked at Dean:

"In these locations, there is an obvious sense of overlapping and staggering, and there is one place in it that should be the location where the victim bleed heavily and even died in the end.

In order to cover up this place, the murderer deliberately dragged it many times with a mop in several places. ”

"What's the point?" Dean was even more confused.

He had never been exposed to such a professional analysis before, so he didn't understand the point of Holtz's words.

"It's about bloodstain analysis." , Holtz pointed to the female forensic officer who was frowning and thinking on the side: "Mellon is a bloodstain analysis expert in our forensic department, Detective Dean, I think you may need her help." ”

The female forensic heard Holtz calling her name, came back to her senses, and explained to Dean:

"Forensic doctors have a mantra called corpses can speak.

Not only corpses, in fact.

Every drop of blood at the crime scene has its own story.

Through blood droplet sputtering morphology, trajectory, laboratory testing, etc.

We can infer the date of the crime, the murder weapon, the trajectory and movement of the person involved, the right and left hand habits of the murderer, the type of injury to the injured person, and even whether the wound would have been fatal at the time. ”

"But..."

Mei solemnly frowned: "This place has been covered with a large number of blood traces, and it is difficult for us to get useful information through blood stain analysis. ”

It is difficult for a good woman to cook without rice.

The blood stains are all covered, and a fart analysis can only be used to identify the time, type and residual genetic information of the blood.

Dean finally understood: "So you mean that the murderer knows the methods that the forensic department might use?" ”

"Yes." , Mellon nodded: "For example, in this case, we can't lock the last location of the victim through the traces of blood, and we can't deduce the murderer's movement trajectory, body size, height, etc., this situation is actually more cunning than directly using reagents to clean up the blood residue." ”

Even if reagents are available, they may not completely remove all blood residues.

But it's hard to find the black dots left behind before blacking out on a piece of paper that is all blacked out.

That's what the murderer thinks.

"Well, the murderer left us at least one dead dog." Dean was ready to ask them to do something that could help: "Guys, please collect this blood in various locations, analyze the composition of it, the surrounding walls, fireplaces, ceilings and other places..."

"Wait!" Mellon interrupted Dean, "You mean the ceiling, the walls, the hearth, and the bloodstains?" ”

"Yes." Dean pointed to the top of his head, "It's not very obvious, though. ”

Mellon came to where Dean had pointed.

After a few glances, she shook her head in disappointment: "There are too few trajectories that can be referenced, and things can't be analyzed, if there are more reference traces in a few directions, it's pretty much the same." ”

Analysis requires data as a reference.

But there is too little data left in the field.

...

After collecting some of the samples, the Forensic Section left with the rotting dead dog.

Lawrence hasn't come over yet.

After the bald patrol officer Hawke left, he still hasn't returned.

Dean, bored, walked to the corner of the fireplace.

On the wall here, there are more than a dozen photo frames, arranged in the shape of a heart, and at first glance, people feel that this is a loving family of four.

Dean took a closer look at their photo, but a weird smile appeared on his face.

He found something very interesting.

In the photo, a man and a woman, who should be brother and sister, holding hands, smiling brightly, looking at the camera.

On the surface, there seems to be no problem with this scene.

But combined with the eyes of the two parents, it is interesting.

Behind the brother and sister, the eyes of the male owner, the afterglow converged on the back of the son's head, and the mother's eyes, like the male host, looked at the back of the daughter's head.

"Is it because the father doesn't like the son, and the mother doesn't like the daughter?" Dean crouched down and glanced at the marks around the frame.

This photo, compared to the rest of the photos, is too inconsistent.

At this look, I found something unusual.

In order to maintain this kind of photo frame for a long time, special materials are generally used to remove the air inside, and a substance such as beeswax is used to seal all the gaps.

But the frame of the family photo in front of me, the gap at the bottom of the bottom, has lost its sealing effect.

Someone opened this frame and replaced the photo inside.

Dean stretched out his finger and placed it on the bottom of the frame, pulling it gently.

The photograph that was originally fixed inside, like drawing paper, slid down and fell into Dean's palm.

Pick up the photo.

Dean noticed that behind the photo, there was a paragraph written in blood: Behind the sacred, there are lies and dirt!

This sentence, accompanied by this weird photo, seems to carry some kind of hint.

And if you look at these photos closely, it's easy to see that this photo is different from the rest of the photos around you, as if you were deliberately alerting someone that something is wrong.

"Is this solving a case or solving a puzzle!"

Dean feels that the murderer is sick!

He tucked the picture back into the frame and ripped it all down.

Put away the frame.

Dean went to the helper's room.

As soon as I opened the door, a strange smell came from the storefront.

The rooms are not small, some like those of a bachelor apartment, and there is a separate bathroom with a TV hanging on the wall.

Underneath the TV, there is a cabinet with a flashing VCD on it, and a bunch of discs on the VCD.

Besides.

It's littered toilet paper, smelly socks, beer cans, and so on.

Dean walked over to the VCD and picked up the discs and looked at them carefully.

Most of them are some romantic films, a few are western cowboy films, and at the bottom, he also found a *****.

"Harry is here, he's going to love this CD."

Dean smiled and returned to the villa hall with nothing.

That's when it happened.

Hawke, who had left, finally returned.

He gasped and handed the two document bags to Dean: "The one is the basic information of the householder's family, and the other is the identity information of the helper, you will never guess what his identity was before!" ”