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

Then Mu Yuan came to the door of the office outside, reached out and moved the door lock, and at the same time looked at the keyhole for a long time.

Manager Lu and the others were confused, and walked around behind Mu Yuan's buttocks.

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 glanced at Mu Yuan and said, "Of course, except for going to the bank occasionally. ”

"Do you usually lock the door to your office after work?"

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

Mu Yuan said seriously: "According to my observation, your door has not been opened by technical unlocking, and of course, it has not been opened by violent means. In other words, if someone enters your office and commits theft, there are only two possibilities. One is to enter with your door open, or to open the door with your key, or to secretly use your key to reassign a new key. Let's not discuss the first case, but in the second case, can you be sure that someone has used or touched your key in the past few days?"

Manager Lu's expression was serious, and he pondered for a moment and said: "Definitely not! I am very cautious about the management of my keys, even if I go home, I will carry it with me, and I will never put it anywhere." ”

Mu Yuan asked calmly, "You...... What about the husband?"

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

Mu Yuan glanced at the other party strangely, he is not married at such an old age?

"Then this possibility can basically be ruled out. Mu Yuan didn't seem to see the other party's expression, "Now there is only the first possibility left, the other party entered with your door open." ”

"It can't be. I've been in this building for the past few days, and the door is locked after work. Manager Lu said with great certainty.

The corners of Mu Yuan's mouth curled slightly, and said, "What I judge is the truth! You only need to confirm now that anyone has entered this room since you put the cash in the safe." In other words, have you been out of the office for a longer period of time to leave a chance for others to enter the office and commit crimes? ”

"It can't be! Even if I leave, it won't take me more than ten minutes. In such a short period of time, even with a flame cutting machine, it is impossible to melt such a large hole in the safe. Moreover, there are people in my left and right offices, who can enter my office with a cutting machine?" said Manager Lu a little impatiently, she felt that Mu Yuan was pure nonsense.

Mu Yuan glanced at the other party and said, "If my judgment is correct, the hole behind your safe is definitely not made in the past few days." There is a more than ninety percent chance that someone dug a hole in it before you put the money in. ”

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

She hated to admit it, but she knew that what the young officer described could happen.

The space inside is relatively deep, and if you don't deliberately lower your head to observe the situation inside, it is definitely impossible to find that the back of the safe has been destroyed.

After all...... No one would have expected that the safe that has been kept in their office on weekdays would have such a big hole in the back.

"How can you judge that this is a thief's trick on the safe in advance? Isn't the other party worried about being discovered?" Manager Lu asked his own question.

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

Because once this fact is established, even if the main responsibility for the theft of the thief lies this time, she will not escape the responsibility of mismanagement.

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

Mu Yuan said in an orderly manner: "I naturally have my basis for making this judgment. First of all, the dust residue in many places on the section of the safe does not look like it can be left in a day or two. In addition, if the safe is cut during the theft, the dust left behind should be relatively even, but when I observe the dust marks on it, it is divided into four levels. ”

Manager Lu looked cute and couldn't help but say, "Dust, is there dust on the section?"

The latter sentence, she said it by looking at Lai Yang.

It's not so much about asking, it's better to say that you've already made it up, and now it's like finding someone to help you prove it.

Lai Yang was very bitter in his heart......

He didn't see any difference in the dust! There were four levels...... If you don't touch it vigorously with your hands, you probably can't be sure if there is dust on it.

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

But this was said by the Mu team himself, who is the Mu team? It is a big cow who can see the presence of fingerprints with the naked eye, is it strange to be able to see the dust?

Therefore, Mu Yuan replied very simply, and said: "Team Mu said that there is, then there must be." ”

Manager Lu opened his mouth slightly and looked at Lai Yang with an incredulous expression.

She wanted to ask: Is this human talk?

But before she could say it, Xiao Yu next to her also said: "Since Team Mu said this, it must be reasonable." ”

Manager Lu looked at the two of them in a daze, and the serious appearance of Lai Yang and the two made her think of a sentence: licking a dog has no house......

Mu Yuan smiled slightly, he felt that these two little friends were quite powerful!

"Manager Lu, the above is the basis for my judgment. As for whether you say that the other party is worried about being seen, to be honest, there is no need to worry about it at all. According to my observations, your two safes haven't been touched for at least three to five months. As long as you don't move your safe, there are many ways you won't notice that your safe is damaged. Besides, even if you find out that the safe is damaged, so what? At most, the safe is broken, and it's hard to say if you can find out who broke it. ”

Manager Lu was silent, and after a while, Manager Lu said, "Can ...... Even if the other party destroyed the safe before, if the other party wants to take away the money, it must be the hands of the two days, right?"

Mu Yuan smiled and said, "This is very simple! Although this safe is very heavy, there are pulleys underneath, and with a slight push, you can move it out." To remove the money inside, you only need to remove the safe and remove the back wall of the safe, which has long been destroyed, and you can easily get all the money inside. It doesn't take much time at all. ”

"This ......"

"Yes...... Even if you know this, isn't the case still unsolved?" Manager Lu said, "What you said, in addition to making the range of suspects wider, will not help much in solving the case." ”

This time, without Mu Yuan opening his mouth, Lai Yang had already said with a straight face: "Manager Lu, you are a layman, and it is normal to not understand." If the Mu team didn't analyze this, we would have solved the case according to the previous investigation ideas, and in the end we would only have fallen into a dead end, and we couldn't even touch the suspect's side. Yes, the process of investigation is a process of gradually narrowing the scope of suspicion, but if the narrowing rules are wrong and the suspect is excluded, then no matter how hard you try, it is impossible to solve the case. ”

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

She hesitated for a moment and said, "Then what do we do now?"

Mu Yuan smiled slightly, and said: "What you need to do is very simple, if my inference just now is completely true, then the only people who can commit the crime are people inside your finance department." And as you said just now, there are less than twenty people in your finance department. It is actually not difficult to find a suspect from these people. ”

After speaking, Mu Yuan didn't give the other party much time, and directly said to Lai Yang: "Lai Yang, you first take a look at the monitoring of this camera inside, and in which periods there is no recording." ”

Lai Yang immediately said: "It's not the day before yesterday......"

"Not necessarily!"

After speaking, Mu Yuan looked at Manager Lu and continued: "Manager Lu, there was a power outage in the camera circuit from the night before yesterday to yesterday morning, are you in the office?"

"No! I was already gone when the power went out, and the electricity was already on when I came in the morning. ”

When Manager Lu is not in the office, the door is locked. In that case, how could the suspect come in?"

"Uh......"

"But the surveillance footage at other times is good......"

Mu Yuan said: "What you say is good only means that there is a surveillance video during this time, but it does not mean that there is a picture in this surveillance video." I looked at this camera just now, and it was only pointing at the location of the safe and filing cabinet, not at 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 was in hand, he took off the covering. In this way, as long as you don't check the existing monitoring footage piece by piece, it is impossible to find that there is a problem with this monitoring section. Even if you look at this surveillance, you won't be able to determine who actually got into the office. ”

Lai Yang suddenly understood, and said with bright eyes: "Understood! ”

All of these surveillances were copied back yesterday, and Lai Yang picked up the phone and called Wang Ming in the Detention Bureau.

When Lai Yang explained that the other party was checking the surveillance, Mu Yuan interjected: "According to my speculation, it will take at least five minutes for the other party to complete the crime." You ask him to observe every five minutes, and quickly find out which time period there is a problem with the surveillance screen, and we can do the next step of investigation. ”

Manager Lu couldn't help but ask, "What if the surveillance screen is okay?"

The corners of Mu Yuan's mouth twitched, and he said: "If there is no problem with the monitoring, the other party will commit the crime under the monitoring, and the case will be solved!"