What Director Huo said makes sense. The fire in the copy room probably has nothing to do with whether the window is open or not.

Their school is a key high school, and both the teaching quality and school environment are the best.

Their school was the first to install light bulbs, and even the copy room was equipped with lights, so there was no need for candles, so there was no fire hazard at all.

"I went to the scene of the accident and found traces of candles on the table and candle wax on the floor."

So, someone went in.

“Who is it!”

"Could it be a school teacher?"

"Impossible." Huo Yichen said without hesitation.

Everyone looked at him.

Huo Yicheng analyzed: "Indeed, there are many teachers in our school who live on campus, but most of them go home every day.

The school has dormitories for boys, girls, and teachers and staff. There are dormitory supervisors at the door of each dormitory, and the door is locked every night.

"I asked the dorm manager, and he said there was nothing unusual last night. Even if the teacher came in, there are still several questions that remain unexplained."

"First, why did that teacher come to the copy room so late at night? What was his or her purpose? What was his or her intention?"

"Secondly, if the teacher came to the photocopying room, why didn't the dormitory manager see anyone coming out of the dormitory?"

"Third, since you are a teacher, why did you come here? Why did you bring a candle instead of turning on the light? Is there some reason why you can't turn on the light?"

"Fourth, the key to the photocopy room is very difficult to obtain. There are three keys in total. One is in the security office, one is with me, and one is with the teacher in the photocopy room. How did that teacher get the key and get in without anyone noticing?"

“…”

Huo Yicheng's four points touched everyone's heart.

That’s right, why.

Lin Yin thought seriously and didn't say anything.

After Huo Yicheng finished his summary, he looked at them and said, "We must get the answers to these questions before we can unlock the following questions."

The three grade leaders racked their brains but could not figure out the reason.

"Since he or she chose to go to the copy room at night instead of in the morning, it means that this matter can only be done at night, not in the morning."

Lin Yin suddenly spoke.

The three teachers including Huo Yichen looked at Lin Yin.

Lin Yin continued to analyze: "The second and third questions are the same. She could have turned on the lights but chose to light a candle. This proves that she didn't want the patrolling security guards to know she was in the copy room."

Because if the security guard sees the light in the photocopy room, he will definitely come over to take a look.

If it is a teacher, I will say hello and exchange pleasantries.

Obviously, the man didn't want security to come over.

In other words, that person was not a teacher, so he was afraid of seeing the security guard.

"The last question is, how did that person get the key to the copy room? First of all, it has been confirmed that there are only three keys. One is with Director Huo, and Director Huo is sure that the key has not been stolen. The second key is in the security room because all the keys are backed up in the security room in case of an emergency.

But when the fire broke out yesterday, a security guard went to retrieve the key, which proves that it wasn't that key that opened the door. So it can only be the third key..."

"You mean, this was done by the teacher in the photocopying room?!"

"Not necessarily." Lin Yin shook her head. "There are two possibilities now. The first is, just like the teacher said, it was done by the teacher in the photocopying room. The second is..."