The two deceased in this case are both villagers of Yushugou in Chenglin County, the difference between the two is 20 years old, and there is no intersection between life and work.

We went to Yushugou to investigate but did not get any valuable clues, and now we can only return to the scene of the crime to investigate again.

The second time we went to room 414 at the scene of the crime, the last time we focused on controlling the person under the bed, and the police did not know the situation at that time, because the person under the bed was most likely the murderer with a gun.

This time, we're going to do a thorough survey of Room 414.

As long as the case is done by people, it will definitely leave clues, and there is no perfect crime in the world......

When we returned to the small hotel from Yushugou, Jiang Tingbai had already arrived at the scene with a technical team, and after meeting us, the police began a second investigation of the scene.

Room 414 has been locked down since the police left, and the situation in the room has remained the same, and when we entered the house, we once again smelled the familiar pungent perfume smell.

This had a great impact on Jiang Tingbai, who was an expert in the trace examination department, especially because of his extraordinary sense of smell, he could smell the slightest smell at the scene, which was also the origin of his nickname "old dog".

"Can you smell the brand of perfume," I asked, turning to Li Meng.

Li Meng was a little uncomfortable by the smell, frowned and said: "This perfume has no brand, as soon as you smell it, you know that it is a wholesale product from a stall, no one will spray this perfume on the body, even if it is sprayed, it will not be sprayed so much." ”

"Yes, there are three men in the house, how can a man use perfume?" After listening to this, Lin Zifan was very puzzled.

This is also the strange thing about this case, there is no perfume in the room of the small hotel, so it means that the perfume was brought in by the three of them. A forty-year-old KTV owner and a twenty-one-year-old teenager will not carry perfume with them, so it is very likely that this bottle of perfume was brought in by the murderer.

"If the murderer brought it in, it should be to cover up the smell of blood at the scene." Xue Hang thought about it and said in a deep voice.

I nodded, for I thought so too, but it seemed redundant, this room had no windows, the door was closed, and even if there was a smell of blood, it wouldn't float out.

So what does perfume do?

"Maybe the murderer is trying to cover up the smell of blood on his body, and after he kills someone, he must have blood stains on his body, and there must be a smell of blood." Dawn pinched her nose and said to us.

Although her words make sense, in my opinion, they are still a bit excessive, and even a bit of a cover-up.

After the murderer killed, he changed his clothes and left, just to hide his identity, and there was no blood on his body, so he had already covered his identity. But if he sprays himself with perfume, he obviously wants to cover it up.

Such a large smell of perfume wafting out of a man, which can be smelled from a distance of more than ten meters, will definitely attract the attention of others. If this is the case, then there will be such a strong smell of perfume in the house.

"And what is this bottle of perfume sprayed in the room for?"

What else is there in the room other than the smell of blood to cover up......

Blood, corpses, corpse stench......

It's the smell of corpses! Perfume smell I want to cover up the smell of corpses!

Thinking along this line of thought, I suddenly remembered what the owner said, the owner said that when the murderer left room 414 at noon yesterday, he went to the front desk on the first floor to renew the room fee for three days, and specially instructed: "Room 414 does not need to be cleaned." ”

It seems that the murderer has made sufficient preparations to delay the police to find the body with three days' room fee, and the perfume is to prevent the corpse from emitting the smell of corpses and being discovered. The smell of corpses is much stronger than the smell of blood, otherwise Ren Qiushi's body would not have a smell of corpses that could not be washed off all year round.

The murderer even thought of perfume, and it seems that his murder was carefully planned and very well prepared. This further shows that the contradiction between the murderer and the two deceased is long-lasting, not an overnight murder of passion, let alone manslaughter.

Continuing to investigate the scene, I turned around and walked into the bathroom, which was very messy. The shower room in the transparent glass was covered with dry water stains everywhere, on the walls, on the floor, on the glass walls. White towels and bath towels are discarded in the sink after use.

Surveillance footage shows that the murderer and Xie Tianjun entered room 414 at half past nine, and Dai Xiaowu entered room 414 at half past ten. At eleven o'clock, when the waitress went to the door to ask, Xie Tianjun and Dai Xiaowu were already dead.

So the one who took a bath in room 414 could only be the murderer.

The murderer must have had blood stains on his body after killing the two people, and he only left the scene after taking a shower and changing his clothes after the killing. The surveillance video also shows that the murderer's clothes were indeed different when he entered the room and when he left the room, and the murderer wore an extra black cap when he left.

I informed the technical team that a careful investigation of the floor drain in the shower room might be able to extract the killer's hair.

I took a closer look at the environment, set my eyes on the toilet bowl here, reached out to hold the toilet tank, lifted it slightly, and made a porcelain friction sound, and the lid of the tank opened.

The toilet tank in the bathroom is an often overlooked place, and at the scene of the crime, it is often where some key items are hidden. In particular, when the criminal police cooperated with the anti-narcotics police to raid and arrest drug users, many drug users hid key equipment in toilet tanks to evade inspection.

I looked inside and suddenly saw a black package inside!

We quickly reached out and lifted out the black package inside, which was a black plastic bag that had been soaked in a lot of water.

Place the plastic bag on the ground, inside are some soft items that feel like clothing.

Gently open the mouth of the plastic bag and take out the contents of it, which is a full set of men's clothes with blood stains on it.

"Blood-stained clothes? It was left by the murderer?! Li Meng squatted beside me and suddenly shouted.

"It seems that it is......" I nodded, pondered for a moment, and suddenly frowned: "The murderer can put this suit in a backpack and bring it in, why can't he carry this suit out and throw it away?" It's suspicious to stay at the scene of the crime......"