Mu Yuan thought for a moment, then suddenly squatted down, leaned against the fuse of the safe, and slowly frowned.

Then Mu Yuan came to the door of the office outside, stretched out his hand to move the door lock, and at the same time stared at the keyhole for a long time.

Manager Lu and others were confused and followed Mu Yuan around.

Suddenly, Mu Yuan raised his head and asked Manager Lu, "Manager Lu, do you usually stay in the office when you go to work?"

Manager Lu looked at Mu Yuan and said, "Of course, except for going to the bank occasionally."

"Is your office door usually locked after get off work?"

Manager Lu said with great certainty: "Of course, I put a lot of important information in here, so of course I have to lock the door."

Mu Yuan said seriously: "According to my observation, your door has never been opened by technical unlocking. Of course, it has also not been opened by violent means. In other words, if someone enters your office to commit theft, there are only two possibilities.

. One is to enter when your door is open; the other is to open the door with your key, or secretly use your key to get a new key. In the first case, we will not discuss it first.

Discuss and talk about the second situation, are you sure that someone has used your key or touched your key in the past few days?"

Manager Lu looked serious and thought for a moment before saying, "Absolutely not! I manage my keys very carefully. I carry them with me even when I go home and never leave them anywhere."

Mu Yuan asked calmly: "Where is your husband?"

Manager Lu's face darkened and he said, "I'm not married yet."

Mu Yuan glanced at the other person strangely. He's still not married at such an old age?

"Then this possibility can basically be ruled out." Mu Yuan seemed not to see the other party's expression, "Now there is only the first possibility left. The other party entered when your door was open."

"This is impossible. I have been in this building during working hours these past few days, and the door is locked after get off work." Manager Lu said with great certainty.

Mu Yuan raised the corner of his mouth slightly and said: "What I judged is the truth! Now you only need to confirm who has entered the room inside since you put the cash in the safe. In other words, during this time you

Have you ever left the office for a long time, leaving others with the opportunity to enter the office and commit crimes?"

"It's impossible! Even if I leave, it won't last more than ten minutes. In such a short time, even with a flame cutter, it's impossible to melt such a big hole in the safe. Besides, there are people in the offices on my left and right, who can take it?

Come into my office with a cutting machine?" Manager Lu said impatiently, she felt that Mu Yuan was just talking nonsense.

Mu Yuan glanced at the other person and said, "If I'm right, the hole behind your safe was definitely not made in the past few days. There is a 90% chance that it was caused by you before putting the money in."

Someone dug a hole in it."

"This..." Manager Lu's expression changed slightly.

Although she didn't want to admit it, she also knew that the situation described by the ridiculously young police officer could indeed happen.

The safe is not high! The space inside is relatively deep. If you don't deliberately lower your head to observe the situation inside, you will definitely not find that the back of the safe has been damaged.

After all... no one would have expected that the safe that was always kept in his office would have such a big hole in the back.

"How do you judge that this is something the thief did on the safe in advance? Isn't the other party worried that it will be discovered?" Manager Lu raised his own question.

Although she thought it was possible what Mu Yuan said, she didn't want it to be a fact.

Because once this fact is established, even if the main responsibility this time lies with the thief, she cannot escape the responsibility of poor management.

It is certainly impossible for the police to hold her responsible for this, but the company needs her to give an explanation.

Mu Yuan said methodically: "I naturally have my basis for making this judgment. First of all, the dust residues in many places on the section of the safe do not seem to be left in a day or two. In addition, if it is a theft,

When the safe was cut, the dust left behind should be relatively even, but when I looked at the traces of dust on it, it was divided into four levels."

Manager Lu looked cute and could not help but said: "Dust? Is there dust on the cross section?"

She said the last sentence while looking at Lai Yang.

Rather than asking, it is better to say that I have already determined it, and now I feel like I am looking for someone to help me prove it.

Lai Yang felt very miserable inside...

He didn't see any difference in the dust! There were four levels... God damn four levels. If you didn't touch it hard with your hands, you probably wouldn't be able to tell whether there was dust on it.

Of course, there must be dust, but how much dust can accumulate in a few days?

But these words were spoken by Captain Mu himself. Who is Captain Mu? He is a master who can see fingerprints with the naked eye. Is it strange that he can see dust?

Therefore, Mu Yuan answered simply, "If Captain Mu said there is, then there must be."

Manager Lu opened his mouth slightly and looked at Lai Yang in disbelief.

She wanted to ask: Is this human language?

But before she could say anything, Xiao Yu, who was next to her, also said, "Since Captain Mu said this, it must make sense."

Manager Lu looked at the two of them blankly. The serious looks of Lai and Yang reminded her of a sentence: a licking dog has no house...

Mu Yuan smiled slightly, he thought these two friends were quite capable!

"Manager Lu, the above is the basis for my judgment. As for whether you are worried that the other party will be found out, to be honest, there is no need to worry about it at all. According to my observation, your two safes have not been used for at least three to five months.

It has been moved. As long as you do not move the safe, there are many ways to prevent you from discovering that the safe is damaged. Besides, even if you find that the safe is damaged, so what? At most, the safe is damaged.

, it’s hard to say whether you can find out who sabotaged it.”

Manager Lu was silent. After a while, Manager Lu said: "But...even if the other party had destroyed the safe before, if he wanted to take away the money, he had to do it in the past two days, right?"

Mu Yuan smiled and said: "It's very simple! Although this safe is very heavy, there are pulleys underneath. You can move it out with a slight push. To take away the money inside, you only need to remove the safety

By removing the damaged back wall of the safe, you can easily take away all the money inside. It doesn't take much time at all."

"this……"

"But...even if we know this, the case is still unsolved, right?" Manager Lu said, "What you said, apart from broadening the scope of suspects, won't be of much help in solving the case."

This time Mu Yuan didn't need to speak, Lai Yang said sternly: "Manager Lu, you are a layman, so it's normal for you not to understand. If Team Mu hadn't analyzed this, we would have followed the previous investigation ideas to solve the case, and we would have ended up in a dead end.

, you can’t even touch the edges of the suspect. Yes, the process of investigation is a process of gradually narrowing down the scope of suspicion, but if the narrowing rules are wrong and the suspect is excluded instead, then no matter how hard you try, it will be impossible to solve the case.

of."

Even if Lai Yang didn't speak in such detail, Manager Lu knew that he had said the wrong thing.

She hesitated and said, "Then what should we do now?"

Mu Yuan smiled slightly and said: "What you need to do is very simple. If the inference I just made is completely true, then the only people who are likely to commit the crime are people within your finance department. And you just said that only people in your finance department can commit the crime.

There are less than 20 people. It is actually not difficult to find the suspect among these people."

After saying that, Mu Yuan didn't give the other party much time, and directly said to Lai Yang: "Lai Yang, first take a look at the surveillance of the camera inside and see during which periods there is no video."

Lai Yang immediately said: "It wasn't the day before yesterday..."

"That's not necessarily the case!"

After saying that, Mu Yuan looked at Manager Lu and continued: "Manager Lu, the camera circuit had a power outage from the night before yesterday to last morning. Are you in the office?"

"No! I had already left when the power went out, and the power was already on when I came in the morning."

"That's right! When Manager Lu is not in the office, the door is locked. In this case, how could the suspect come in?"

"Well……"

"But the surveillance videos at other times are all good..."

Mu Yuandao: "What you mean by good is that there is surveillance video during this period, but it does not mean that there is a picture in this surveillance video. I just looked at the camera and it was only facing the position of the safe and file cabinet, and there was no

Facing the door. In other words, the suspect can use very simple means to cover the surveillance probe outside the surveillance screen, and then commit the crime. When the money is obtained, he will take off the cover. In this way, as long as you

Without checking the existing surveillance footage section by section, it is impossible to find out that there is a problem with this section of surveillance. Even if you check this section of surveillance, you cannot determine who entered the office through the surveillance."

Lai Yang understood immediately and said with bright eyes, "I understand! Captain Mu, I'll let someone take a look right now."

All these surveillance cameras had been copied back yesterday. Lai Yang picked up the phone and called Wang Ming in the left-behind bureau.

When Lai Yang told the other party to check the surveillance, Mu Yuan interjected: "According to my guess, it will take at least five minutes for the other party to complete the crime. You ask him to observe five minutes as a node and quickly find out which time period.

If there is a problem with the surveillance footage, we can proceed with the next step of investigation."

Manager Lu couldn't help but ask: "What if there is nothing wrong with the surveillance footage?"
Chapter completed!