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The smell that alerted Chen Yan was nothing else.

It was a trace hidden under the thick smell of blood … A stench.

Closing the olfactory gene lock, Chen Yan frowned.

A stench!

Moreover, it was different from the stench in the bathroom. This smell…

Chen Yan was more familiar with it.

Or rather, every experienced detective would be familiar with it.

It was the stench of corpses.

The smell of corpses was different from other smells. This kind of smell was very special. It was the kind that you would never forget once you smelled it for the rest of your life.

“When the deceased was found, how long was it before he died?”

“28 hours.”” According to the shape and depth of livor mortis,” Ren Hongfeng answered straightforwardly,” and the stiffness of the body, we found the victim about 28 hours ago.”

28 hours…

Chen Yan thought to himself.

After an animal died, the bacteria in the animal’s body would begin to digest and decompose the corpse itself after a certain period of time.

Primates, including humans, usually died an hour later. The corpse gradually stiffened, and the bacteria in the stomach and intestines began to digest and absorb human tissues.

Slowly, as time passed, the stench of corpses began to form.

As time passed, when the body was digested to a certain extent, a large amount of gas would be produced inside the body. The body would swell and eventually explode.

Just like the well-known whale explosion.

However, it had only been a little more than a day. According to the room temperature of about 20 degrees Celsius, the smell of corpses should not have been produced.

In other words, it shouldn’t produce the stench of corpses that people could easily smell.

Of course, Chen Yan’s olfactory gene lock was unlocked, and the sensitivity of the smell he could capture was more than a hundred times that of a normal person.

Carefully observing every part of the scene, Chen Yan simultaneously opened the visual gene lock.

The entire room seemed to be magnified in front of Chen Yan.

Every tiny detail could not escape Chen Yan’s observation.

The blood splattered on the energy-saving lamps on the roof, the dust in the cracks at the corners of the walls, and the marks left by the deceased scratching the floor tiles because of the intense pain…

At the crime scene, every detail flashed through Chen Yan’s mind.

Ren Hongfeng did not disturb Chen Yan.

He had long heard of Chen Yan’s rumors.

Wang Shun, the current captain of the Detective Squad of Iron City, was Ren Hongfeng’s classmate.

It was all thanks to Chen Yan’s help that Wang Shun was able to be promoted from his original deputy position to the leader.

Otherwise, if the murder case was not solved, it would be good enough if he was not dismissed.

According to Wang Shun, Chen Yan was definitely a first-class expert in on-site investigation.

He was very good at finding problems in the details.

He hoped that this time, Chen Yan would still be able to find something.

Turning around the screen, Chen Yan came to the place where the deceased was broadcasting live, which was also the bedroom of the deceased when he was alive.

There was only a computer screen on the computer desk. The main computer had been taken back by the Pan City Detective Squad for inspection.

Behind the table was a double bed.

The entire bedroom was decorated with a warm pink tone. There were also some dolls hanging on the screen.

The bed was very clean, and there was a faint fragrance. The blanket was flat, and it should have just been changed.

Ren Hongfeng, who was behind Chen Yan, noticed that Chen Yan was focusing on the bed.” It’s very clean up there. There’s no trace of the deceased’s hair.”

Chen Yan nodded. It was indeed very clean.

He didn’t find anything suspicious even after opening the visual gene lock.

Chen Yan turned around and walked out of the bedroom. He went to the bathroom.

Since the murderer had cruelly cut off the facial tissue of the deceased, it was most likely not an unintentional act.

The missing facial tissue had not been found yet. It must have been taken away by the other party, or at least taken out of this room.

The other party definitely had a motive for doing so.

However, it was unlikely that the other party would take the bloody skin away.

It was very likely that he had washed his skin in the bathroom.

The bathroom in the house was not big.

The basin was very clean.

” Team Leader Chen.” Ren Hongfeng looked at the basin.’Tve checked this basin myself. The elbow at the bottom has also been opened.”

” Also, we checked the sink in the kitchen. There’s no trace of blood in it. The other party probably didn’t use this sink, and neither did the sink in the kitchen.”

Never used it?

Did you check the kitchen sink?

Of course, Chen Yan believed in Ren Hongfeng’s judgment.

An old detective would usually not make any mistakes after personally inspecting something.

Moreover, Ren Hongfeng was very meticulous. He should have had experience in this area before.

However, the water in the bathroom was not limited to this area.

The washbasin was just what people were most used to washing their hands.

” Captain Ren.” Chen Yan’s gaze left the basin.”This floor drain…Have any of you touched it?”

Floor drain?

“I really haven’t tested the floor drain.” Ren Hongfeng shook his head.

Didn’t check?

Since it had not been checked, it meant that no one had touched it. However, since no one had touched it, why was the surface of the drain so smooth?

There were usually three places where the toilet would drain.

The washbasin, toilet bowl, and floor drain.

However, after Chen Yan looked at the sink, he didn’t pay attention to the toilet bowl. Instead, he went straight to the drain.

As everyone knew, very few people would wipe the bathroom clean after a shower.

Even if there were, very few people would wipe the floor or even the floor drain.

In Chen Yan’s eyes, there were traces of dried water stains on the walls of the bathroom, as well as on the floor.

This proved that the victim did not have the habit of cleaning the walls and floor after being drenched in the rain.

However, why was the surface of the floor drain smooth?

Chen Yan crouched down, approached the floor drain, and activated the olfactory gene lock.

As expected!

A faint smell of blood wafted from the floor drain!

Chen Yan carefully took out the metal piece on the surface of the floor drain and put it into the evidence bag.”Give me a longer pair of tweezers!”

A moment later.

Ren Hongfeng and Wang Xuan, who was behind him, looked at the tweezers in Chen Yan’s hand in shock.

There was a scalpel on the long forceps.

The stainless steel blade reflected the light like a cold ray of light.

“This, this…This…”

Wang Xuan stuttered. He looked at the scalpel and could not speak.

Ren Hongfeng was so excited that his face turned red!

A scalpel was found in the drain of the deceased’s house. Moreover, there was blood in the gap between the scalpel blade and the handle.

Murderous weapon!

There was a high chance that this was the murder weapon used by the murderer!

“Team Leader Chen!” Ren Hongfeng’s excited voice was a little out of tune.”You found the murder weapon?”

The most important thing in solving a murder case was the integrity of the evidence chain.

And the weapon was the most important part.

If the murder weapon could not be found, it would be very difficult to conclude the case.

As for Chen Yan, he had only been in Pan City for a few hours. He had found the murder weapon on his first investigation of the scene!

Not to mention the problematic surveillance video in the corridor.

This was a major breakthrough in the case.

Chen Yan handed the evidence bag and tweezers to Wang Xuan.”Check the weapon immediately!”

Although the possibility of finding the murderer’s fingerprints was relatively small, it was necessary to collect traces of the weapon.

These five days, Ren Hongfeng was under a lot of pressure.

In five days, there was no progress at all.

However, Chen Yan only came for a few hours and found important evidence.

Ren Hongfeng was now full of confidence in solving the case!

” Team Leader Chen.” Ren Hongfeng gave Chen Yan a thumbs up.”I couldn’t believe it when you were awarded the honor at the provincial team that day. You’re so young, how did you get so many honors!”

“Now, I’m convinced. You’re simply…”

Weng weng weng weng…

As Ren Hongfeng spoke, his phone rang. He wanted to hang up, but Ren Hongfeng subconsciously raised his hand to look at the caller ID.

It was Wang Jian, the vice-captain of Pan City’s Investigation Unit.

” Team Leader Chen,” Ren Hongfeng pointed at the phone.” It’s Vice-Captain Wang Jian. He’s in charge of checking the people in the building. If he calls at this time, he might have found something new.”

Chen Yan nodded and gestured for Ren Hongfeng to answer the phone.

“Old Wang, did you find anything?”

However, Ren Hongfeng’s expression changed drastically after picking up the call!

Ren Hongfeng hung up the phone in a hurry. His expression was solemn, and his voice was trembling.

“Team Leader Chen, something happened…”