Back at the bureau, Xu Xiaodong was leaning back in his seat and putting eyedrops in his eyes. When the two came back, he said, "Have you caught the murderer?"

"Do you think it'd be so fast?" Lin Dongxue asked.

"If you’ve caught her, I wouldn’t have to watch this anymore… I’m nearly blind from watching all day.”

Chen Shi asked, "Are you watching at the normal speed?"

"Yeah, didn't you tell me to watch carefully?"

"Aren’t you being too earnest? 2x speed would have been fine!"

"Damn you, why didn’t you tell me earlier?! My eyes are so uncomfortable. I’m going to go to the window and stand there for a while.”

Chen Shi sat down and asked, "Who entered the duty room?"

"No one. Only the security guard."

"You’re sure?"

"I’m certain. Didn’t you say the murderer entered the duty room and deleted the footage? I stared at the footage...