On weekend mornings, while Qian Yi was sleeping at home, he received a phone call.

He rubbed his eyes and pressed the answer button, "Hey? ”

"Room 408, Building 3, Songyang Apartment."

The phone was hung up, but Qian Yi didn't have the heart to sleep anymore, and immediately put on his clothes and went to Songyang's apartment.

When he came out of the elevator, he happened to run into Lin Yang and Yang Yu.

"You're very well-informed!"

Lin Yang couldn't help but tease.

"Just now I told Yang Yu whether you would come, but I didn't expect you to really be there."

"Team Lin, what's going on?"

"Like you, we also received a report call, saying that room 408 had a strong smell of blood, and the landlord was afraid that something would happen, so he called us and asked us to take a look."

As he spoke, Lin Yang asked the people from the technical department to open the door.

More than ten minutes later, when the door was opened, everyone was shocked by the horrific scene inside.

The blood on the ground had dried up, and the three dead had collapsed on the couch, the window, and the floor.

Lin Yang and the others put on shoe covers and walked in, and found two dead people from the bathroom and toilet respectively, and a total of five women were brutally killed.

Yang Yu put on gloves and bent down to check the wounds of the deceased and the time of blood clotting, and determined that the deaths of these deceased were more than twelve hours, and according to the time of wound and blood clotting, the order of killing could be determined.

The first to be killed were the two victims at the window and the toilet, then the two in the bathroom and the sofa, and the last one at the gate.

It should be said that the victim at the gate was not completely angry at first, but wanted to struggle to call for help, but the murderer was very cruel, and before leaving, he stabbed each of the dead several times to make sure that they were all angry before leaving.

This case can be said to be the most murderous case that Qian Yi has encountered, and it is also the one with the most victims.

His expression was a little solemn, but he soon saw something unusual.

Although the victim at the window shed a lot of blood, the blood stains only reached the edge of the window, but there was not a single stain on the window.

Judging by the part of the deceased's injuries, the blood spilled must have stained the window, but it was clear that the area around the window was very clean, as if it had been deliberately cleaned.

Qian Yi compared the glass next to him and felt that the color in front of him was a little dark, so he found a cotton swab and wiped the window after dipping it in water.

Sure enough, the color of the swab turned red, apparently because the murderer was afraid of being discovered.

Qian Yi quickly put the cotton swab in a plastic bag separately, and asked Yang Yu to take it back and conduct DNA comparison to see if it belonged to these victims, if not, it means that the blood stain belongs to the murderer.

"Yes, you're looking closely."

Yang Yu took over the evidence and still appreciated Qian Yi's performance.

"You can't let go of any detail, that's what a criminal investigator should do. Not to mention that, what happened here is too horrific, and I suggest that the bodies be brought back to the police station first, and then find their families based on other identifiable information left at the scene. ”

"Well, I agree with you!"

While the police officers who handled the body of the task force put the victim's body into a bag and moved it out, Qian Yi found that there was some powder on the ground.

He took the paper towel from the hurry, gently put the powder on it, carefully put it in a plastic bag, and brought it back to the police station.

Through examination, the white powder was a drug, and the blood on the window was confirmed to be inconsistent with the blood type of the five victims.

After further autopsy, Yang Yu found that none of the five victims had drug residues in their bodies, that is, the white powder was most likely left by the suspect, and the other party was a drug addict.

"The first three deceased were all stabbed several times before they died, and it is possible that the suspect was unable to accurately stab the victim because of the blurred vision caused by drugs, so that the knife repeatedly stabbed the same wound. The latter two victims were both fatal with a single knife, and it was obvious that the suspect was awake at this time and wanted to escape as soon as possible. ”

Qian Yi nodded, and went to ask about Yang Jin's community monitoring.

Yang Jin shook his head helplessly, "The other party has been wearing sunglasses and a mask, except for taking a general figure, it is impossible to confirm the appearance of this murderer, and it is impossible to track it." ”

"Where was the last place the suspect appeared?"

"Kiosk near the complex. I heard from the boss over there that this person's hands were shaking when he was shopping, and he was still concerned about it at the time, but he was glared at by the man, and he was so frightened that he didn't dare to speak anymore. ”

"What did he buy?"

"Curling, tinfoil, tubes, lighters. These things are essential for heavy drug addicts, but curling is usually just a glass of art, so even if we know that some criminals need it, there's nothing we can do to stop it from being sold. ”

"Have you ever asked the boss if this man touched something with his hand when he went shopping?"

Yang Jin was stunned, "It's not clear." However, the boss said that the man was in a trance, broke a teacup in front of the counter, and his foot was cut by splinters, and he bled a lot. ”

"What about the shards?"

"I brought it back a long time ago. Although this is tantamount to looking for a needle in a haystack, with DNA, it is always convenient to track down the murderer. ”

While they were discussing, the people from the laboratory department informed Qian Yi and Yang Jin that the other party had a rare blood type, Rh negative blood.

If a person with this blood type loses too much blood, he will die, because there are no more than 100 of this special blood type in the country, and it is difficult to find a matching blood sample.

Because I was afraid that a large-scale investigation would attract the attention of the murderer, I could only go to the hospital to get some information from the roster of residents in the community to see if it could be correct.

Yang Jin volunteered to do this, and Qian Yi went to the community with Lin Yang to visit again.

The residents of room 407 told Qian Yi that the girls in room 408 usually play crazy, and they always take all kinds of men back, and then make trouble until the middle of the night, and the people who go up and down the stairs are more disgusted with them, so on the night of the crime, although there were screams or something in the house, everyone thought that this was the norm, so they didn't care.

Qian Yi took a notebook to record this information and continued to ask questions.

"Can you describe what the people who went in with the girls that night were like?"

"This ......"

The occupants of 407 showed a look of embarrassment on their faces, obviously worried.

Qian Yi immediately spoke to appease.

"You can rest assured that we will keep your testimony confidential, and no one will know that it is the clues you provided."

"Then I'll tell you. I remember that when I came home that night, I was crowded in an elevator with the girls, and the man had a long scar on his face, and his hat was kept low, and he was afraid to see people......"