The system is the king of the counterattack master

Larson climbed up the ladder in some confusion. When he got down from the ladder, his face had become very ugly.

"How did you know?" Larson was very puzzled that Han Xiaodong could accurately find clues that they hadn't noticed.

"Tell me what you saw first." Han Xiaodong didn't answer his question, but looked up at the vent and asked back.

"There are scratches. It's very new. Although it's not obvious, it's definitely caused by the metal rope. It's hidden inside the vent. It's very hidden. If it wasn't for you, no one would notice it."

Larson is completely convinced now, the nine-meter-high ceiling, not to mention seeing those traces, it is difficult for him to see the large screws on the vents, this young man can actually see the problem at a glance.

"It's actually not that difficult. All the surveillance cameras in the warehouse on this floor have been replaced at the same time. It seems that the thieves did it for the convenience of their actions, but it's not. They just wanted to cover up their entry and exit routes."

Saying that, Han Xiaodong pointed in the direction of Warehouse No. 19 behind him.

"The monitoring has been erased for 15 minutes in total. No one knows what happened in these 15 minutes. However, if you do a simple calculation, it is not difficult to find out. Taking the NO.15 warehouse as the starting point, excluding the time for opening the door and taking things , the furthest reachable location is this warehouse, or the No. 13 warehouse next door.

The actions of these thieves have been accurately calculated, and they will not waste any second, so it can be inferred that they escaped from here. "

Said, Han Xiaodong pointed to the ceiling above his head.

"But, why can't it be Warehouse No. 13?" Larson asked in confusion.

After all, Larson is also in this business, and he can't think of doubts when he doesn't find a problem. It's okay, when he finds a problem, doubts will follow.

"After the accident, the police will conduct an investigation on the entire warehouse. The corridor in the same corridor as No. 19 must be the focus of investigation, so it is safer than No. 13."

Han Xiaodong spoke confidently, as if he was the mastermind of this case: "After all, the warehouse is so big, the police can't look carefully at every ventilation channel. Once they leave the central area of ​​the case, the investigation will become slack."

The reasoning result given by Han Xiaodong really couldn't find any problems, and it was very realistic.

"Okay, we know one and a half of the three most important things, and now only the last half is left." Han Xiaodong patted the dust on his hands, and his expression became much more relaxed.

"What do you mean? I don't understand. What does it mean to know one and a half of the most important things? Half of them are left? Then there is one more thing?" Larson didn't know the whole process of Han Xiaodong's analysis of the whole case, and neither did Han Xiaodong. He said everything, so it was really hard to understand when he suddenly mentioned three things.

If he hadn't seen the young man's tricks, he would have regarded Han Xiaodong as a lunatic just based on this sentence.

Han Xiaodong was too lazy to explain, but considering that Larson's cooperation is needed for the following matters, he still said:
"Three things, the first is how the thieves got in, the second is how they get the parts through the security check, and the third... can't get an answer here. The second we already know, at least the phenomenon, As for the principle, it is not what we should consider.”

Saying that, Han Xiaodong looked up at the vent above, and began to make his request: "The first thing, we only found the entrance. As you said, how did they pass through the fan, and how did they pass through the infrared detector, We all know nothing. Therefore, we can only say that we know half of it, so now I will trouble you, help me remove the baffle of the vent, and I will go up and have a look."

Larson didn't expect that Han Xiaodong would make this request, but after listening to the analysis, he couldn't help but agree with the proposal.

If you want to find out the truth, the last way is to follow the path that the thief walked. Therefore, Han Xiaodong's request is necessary. Larson nodded quickly and said:

"Wait a minute, I'll find the person in charge here, and then notify Eriksson, and I'll be right back."

Larson turned his head and was about to leave, but Han Xiaodong stopped him from behind him: "Wait, just notify the person in charge here. I think Director Ericsson is also very busy. If it is not a necessary procedure, just Don't bother him, we have the result, just let him know."

"But the main channel has an infrared detector. If you want to check the entire channel, the master must turn off the detector." Larson explained his reason.

"It's okay, I won't go to the main passage, you said, I can't climb up at all, right? If necessary, it's not too late to inform him after we go out." Han Xiaodong insisted on his opinion.

Although Larson didn't know what kind of medicine he bought in the gourd, the habit he had developed over the years still made him obey the order unconsciously.

"Are you suspicious of Eriksson?" K asked in Han Xiaodong's mind after Larson left.

"They couldn't have gotten in without an insider, and after talking to Larson, I always felt like Eriksen was hiding something.

Even if he is not the murderer, I have to guard against him. After all, this guy is the security director of the laboratory. If he calls the police, we will be tied up. "

Han Xiaodong expressed his thoughts, and K didn't ask any more questions. The reason was already made very clear, and he didn't want to attract the police, after all, the identity of the FBI was fake.

After waiting for a while, Larson finally came back in a hurry. He walked quickly, followed by a staff member carrying a toolbox.

"This is the vent, please open it for me, we have to go up and check." Larson pointed to the vent and said to the staff.

The staff seemed to have been ordered a long time ago, took out tools from the toolbox, climbed up the ladder, and began to remove the baffle of the vent.

It was only then that Han Xiaodong noticed that the tools in his toolbox were not made of metal. It seemed that the security of this warehouse was really strict, and even metal tools were not brought in.

After a while, the baffle was removed.

Han Xiaodong climbed up first.

The ladder was high enough that he stood at the top, poking his head into the vent.

Because metal lighting tools cannot be brought in, lighting equipment has been preset for the vent, and the switch is on the top of the vent.

Han Xiaodong turned on the lights and observed the surroundings of the vents. Because the air was still blowing, the airflow in the vents was still relatively large. He carefully checked the edges of the vents. Sure enough, it was on the inside corresponding to the scratch on the outside. There is another scratch, although it is not very obvious, but it can be seen that this is caused by someone hanging a rope inside.

The inside of the air duct is clean and spacious enough to accommodate a person squatting in it.

Han Xiaodong pushed his hands hard and climbed up.Along the direction of the main passage, I fumbled forward.

Due to the lighting along the way, the inside of the ventilation duct can be seen clearly. Unfortunately, because of the 24-hour ventilation and automatic dust removal equipment, there is no dust left inside, and naturally no traces are left.

After arriving at the air inlet divided by the main air duct, Han Xiaodong finally stood up straight and looked up.

As Larson said, the air inlet of this main passage is unusually wide, the walls are smooth, and it is a passage that runs through up and down. The upper part is connected to the second floor of the building, and the lower part is connected to the third underground floor. There is no place to stay No.

Looking at the situation, Han Xiaodong thought in his mind, now it seems that if he wants to know how these people got in, he has to climb up to the main wind tunnel to have a look.