The character of this factory director is so suspicious, the key is either carried with him or hidden somewhere in the office......

And the murderer took all the valuable things in the safe, and there is no way he will not open this drawer to look at it, proving that the key has not been found...... However, even if you don't find the key, you will be smashed open or pried open, right? Unless, something unexpected happened at that time......

"Shasha, you ask the security guards here if they came here to patrol between ten and eleven o'clock last night." Bai Yaqing took out the walkie-talkie and said.

Bai Yaqing searched for a while before finding a key in the mezzanine of the bookshelf.

"I don't know if it's this ......" Bai Yaqing muttered as she tried to open the drawer with the key.

It seems that it is really this key, the factory director hides it in the mezzanine of the bookshelf, is there any secret in the drawer?

However, when I opened it, there was only one disc inside, and nothing was engraved with anything, it was just a CD.

"Xiaoqing, what is this?"

"I don't know, I found it out of this, take it back and take a look, maybe it's a surveillance video." Bai Yaqing said.

There is a pinhole camera here, there should be no monitoring here in the monitoring room, it should be added by the factory director himself, and only he can see it here.

Zhang Zijun put the disc into a ziplock plastic bag.

……………………

A group of serious cases office.

Bai Yaqing: They are starting a meeting on this case.

"You investigated the matter of the Zhu Hall, how is the investigation?"

"I have asked the employees of the workshop in charge of Zhu Hall, and they all have a good evaluation of him, his popularity and reputation are good, and he often helps people." Zhang Jiahua said.

"Have you ever had an argument with anyone?"

"Zhu Hall is the only one in their factory who often has disputes with the factory manager, all for the wages and benefits of the workshop workers." Zhang Zijun said.

"And such a nice person? Truly for his own men? ”

"It seems so."

Bai Yaqing admired this Zhu Hall a lot, and really wanted to be his subordinates......

"Is the autopsy report out?" Bai Yaqing asked.

Liu Fei sent the autopsy report to the big screen, where all the report pagination and photos were on it.

"According to the autopsy report from the medical examiner, the deceased had resisted, had fights, had suffered heavy blows to the head, and had slight bleeding."

"After being knocked unconscious, someone used this round piece of paper to cut their throat to death, and then replaced it with a second piece of paper to cut the flesh and skin, exposing the bones."

"So, someone should be venting their anger after killing him? Cutting the throat to death with this kind of round piece of paper ......" Bai Yaqing felt that it was still unlikely, but a point of view put forward by Zhang Jiahua made her change her mind.

"I think it's possible, because the piece of paper is enough to cut through the iron when it turns quickly, so killing people is easy." Zhang Jiahua said.

"What? Turning paper at high speed? "Why hasn't Bai Yaqing heard of it before?

"yes, someone did a video of an experiment before." Zhang Jiahua said, putting the video on the big screen through an Internet search.

In just three minutes of video, Bai Yaqing and the others seemed dumbfounded after watching it, they didn't expect it to be so powerful!

"So, this kind of piece of paper kills people is completely fine......" Bai Yaqing looked at the round piece of paper is goods.

The one who can think of this murderer is also a talent......