No one stipulates that there is only one murderer, and the possibility of multiple people joining forces to commit the crime is not low, especially since the three of them have quite sufficient motives to kill.

That being said, it is not possible to classify them as criminals based on the motive for murder alone, that is the dark age of the law in the true sense of the word, and there are countless unjust, false and wrongful convictions.

To prove that they are murderers, there must be evidence, and it is irrefutable evidence, otherwise all inferences based on speculation are just empty buildings.

On the surface, the woman and the thin man probably didn't have the ability to kill, and the man who spoke first had the conditions to kill because he was a boxing runner-up when he was in school.

It's just that there is still no evidence, so you can't make judgments.

An Yizhi thought for a moment and asked:

"Who was the first discoverer?"

"It's me."

The female OL raised her hand and said:

"I found it when I went to my boss's office to deliver the report, and I quickly called them."

"You also called the police?"

"Yes."

"Have the other two been to the office besides you?"

The thin man spoke:

"I guess everyone has been there, because it's just the three of us who worked overtime this weekend."

After speaking, he smiled self-deprecatingly:

"Because all three of us are free labor, we can do whatever we want, and a lot of work that we don't usually finish requires us to finish today, so everyone will go to the boss's office to report."

It seems impossible to get more information from the clue of who has been to the office.

"Do you know the order? Or who has left? ”

"This ...... Not very clear. ”

The stout man said:

"Everyone's office is far away, and there is a lot of work, so I don't have time to see other people."

The other two nodded, indicating that he was telling the truth.

There is no alibi, there is no way to know the order of entering the office, and they all have a motive to kill, no matter how you look at it, it looks like the three of them are killing together.

An tapped his forehead with a finger, then stood up and said:

"I understand, thank you for your cooperation, I will assist the police in catching the murderer as soon as possible."

After saying that, he opened the door very simply and went out, and Jimmy and Yumeko Mizushima quickly followed.

"Mr. An, did you find any clues?"

As soon as he went out, Jimmy couldn't wait to ask.

"Sort of, but not at all."

The only gain is probably to know that they all have a motive to kill, but who the culprit is is still a mystery, and it is still a mystery that there is no way to start.

There are two most likely guesses from the current point of view,

One is that the strong man is the murderer, because he has the conditions to commit the crime.

The second is that the two or simply the three of them jointly committed the case, after all, they all had a motive to kill.

It's just that the former has no evidence, and the latter doesn't make sense beyond the lack of evidence.

After the murderer kills someone, he hides and wants to get away with it, but if the situation in front of him is judged by the police to be a joint killing, they must be monitored by the police for a long time.

Don't forget the murder weapon that has not been found so far, no matter what murder weapon the murderer used, how to deal with this thing is also a problem, and if you don't pay attention to show your feet, you will lose everything.

The key to all these puzzles is naturally the disappeared murder weapon. An Yizhi felt that as long as he found it, all problems would be solved.

"Have you ever tested the three of them for a luminol reaction?"

Although the amount of bleeding is not large, it is somewhat some, and if someone has blood on their hands, even wiping it with a wet wipe will leave traces of reaction.

"Yes, but all three of them had a faint blood reaction on their hands, one of them had a nosebleed from the dry weather, and the other two accidentally cut their fingers while sorting out their papers."

What do you have for everyone...... This line really doesn't work.

"Isn't there any news on the key murder weapon yet?"

Jimmy shook his head, and Yumeko Mizushima asked:

"Will it be flushed down the toilet?"

"No way, there are no toilets in this company, only a public toilet, but going to the toilet will be followed by surveillance video, and the video shows that the three people never came out"

Since the murder weapon cannot be thrown out of the window, and it is useless to throw it out, and it cannot be thrown out of the toilet, there is only one entrance and exit of the company, and there is monitoring and surveillance.

This shows that the murder weapon is still within the company, and may even be on the prisoner's body.

"Have you searched your body?"

"I searched it, but I didn't find it."

The forensic doctor speculated that the murder weapon was a spherical object with a blow of about 5 centimeters or more, and if this thing was hidden on the body, it was easy to find out, that is, it was hidden in the corner of the company?

Maybe the police think the same way, they are now looking through all the corners and corners of the company, but the workload is relatively large, and this matter will not come out for a while.

At this moment, another policeman walked up to Jimmy, whispered a few words behind him, and left. Probably something new has been discovered.

"Mr. Ahn, we found a syringe in the paper basket of the victim's office, and the remaining liquid tests showed that it once contained a drug based on procaine."

Yumeko Mizushima tugged at Ann's sleeve:

"What is procaine?"

"A type of medical anesthetic that can be mixed with other agents to make a strong anesthetic."

Ann pointed back for a moment and said:

"This thing should be strictly controlled, right?"

"Hmmm! As long as you investigate the three people, who can get this kind of medicine, you can lock up the murderer. ”

Jimmy looked happy, after all, there was a clear progress in the case.

It's true that thing is indeed a controlled item, but maybe there is some black market or something in this dungeon world, and it may not be so easy to investigate from this aspect, and it will take a lot of time.

But not to mention how the murderer got the anesthetic, at least this discovery made the possibility of the strong man committing the crime reduced, because only if he was not prepared to inject anesthetic, even the other two could easily subdue the victim.

Speaking of which, in the final analysis, it is still a question of where the murder weapon is.

Just standing in place and meditating, trying to break his head may not help, An Yizhi decided to look around, maybe he will find clues and information that he has overlooked.

So he took Yumeko Mizushima and Jimmy around the busy scene of the police officers, and it looked like an old man who came out after dinner to spread out.

An pointed to him wandering aimlessly, thinking about where the murder weapon might be hidden, and then saw a policeman carrying a stretcher into the victim's office, which was supposed to be taken away for autopsy.

This shows that the evidence collection work at the scene of the crime has basically entered the final stage, and if the murder weapon has not been found and it cannot be proved who the murderer is, the murder weapon is likely to be destroyed by the murderer.

On top of that, this way, An Yizhi's side quest also failed.

He watched as the police carried the victim's body onto a stretcher, looked around the office again, and immediately noticed something that he had previously overlooked.

So that's what happened......

Sure enough, walking more is still more reliable than standing in place and blindly trying to think about it, An Yizhi entered the office again, this time they did not run to see the corpse, but stood in front of the fish tank.

"What kind of fish is this?"

"I don't know...... I guess it's a tropical fish. ”

"It looks delicious."

“……”

There was a conversation between Yumeko Mizushima and Jimmy from behind, and Ann reached out to open the lid of the water purifier on the top of the fish tank.

"As expected!"

"Mr. An, did you find anything?"

When Jimmy heard the voice, Ann Yizhi simply pulled the water purifier out of the bathtub and showed it to him and Yumeko Mizushima.

There is a filter paper in the box of the water purifier that is used to filter impurities in the water, under normal circumstances, it should be fishy fish feces and uneaten fish food, but it can be clearly seen that there is a thin layer of blood stains on the white filter paper.

"Although I don't think it's necessary, but take it for testing, and the residual blood should be consistent with the victim's blood."

"Why is it not necessary?"

Jimmy wondered.

"Because I already know who the murderer is."

Ann smiled smugly, not caring about Jimmy's eager questioning, but walked out of the office to open the room where the three suspects next door were temporarily staying.

After entering, Ann pointed and opened his mouth and said:

"Take off your shoes."

"Mr. An, what happened when you said you knew the murderer? Why let them take off their shoes? ”

"As long as you take it off, you will know who the murderer is."

He didn't explain much, because it was clear who the murderer was.

As An Yizhi said, as long as he took off his shoes, he could easily tell who the murderer was, and among the three suspects, only one had not taken off his shoes for a long time, and that was the thin man.

"The murder weapon used by the murderer has actually been placed in front of us all along, which is river sand and pebbles in a fish tank."

"Sand? It's so small, even a pebble is only the size of a thumb, so it's impossible to kill someone, right? ”

"Of course not, but if you stuff these things into your socks......"

An pointed at the thin man, and said:

"Large particles of river sand and pebbles are wrapped in socks, as long as there is a long enough sock tube and enough filling, it can be used as a simple chain hammer, and the murderer's repeated blows to the back of the victim's head are not only as simple as seeking revenge, but also have reasons why it cannot be fatal without repeated blows."

Jimmy suddenly said as if he had been enlightened:

"It's no wonder that there are blood stains in the water purifier in the bathtub, and the water pump pumps up the remaining blood stains and flows them onto the filter paper."

"That's right, I guess he first used anesthetics to make the victim unable to resist, and killed people in the above way, and then wiped the excess blood stains on it with a tissue, and then poured the contents of the socks back into the bathtub, and by the way, they were simply washed and wrung out in the bathtub, because it was a pair of dark socks, so even if it was a little wet, there was basically nothing wrong with it from the outside."

An Yizhi fully learned a lesson from the previous time, and paid attention to keeping a distance from the murderer when explaining the case, so as not to jump off the wall in a hurry.

He took a half-step back to make sure he was under Jimmy's protection before finally speaking:

"Then, the matter is simple, please take off your shoes and see if your socks are wet, and you can go to the police station to talk about the rest of your arguments in detail."