The butler in the glass house was killed by Bai Zizhou in the script.

The first case: Death of the housekeeper (Bai Zizhou)

According to the original 7 sets of tableware, a knife was missing after the incident and the time of death was within 5 minutes → the murderer was gathering in the restaurant Take a knife and kill the housekeeper in the chaos; the door can only be opened after the glass bursts, and the glass is all of the same specifications → the murderer placed glass between the door and the steps, and when people stood up, the glass blocked the door and could not be opened.

There is paint on the chest → allowing the murderer to kill accurately in the dark (Xia Jiao and Li William have astigmatism, ruled out)

Shasha and Yu Fei hugged each other tightly (mutual evidence, ruled out) )

Xue Rou’s tight dress (unable to hide the knife, excluded)

Zheyan yelled to squat down & lit a lighter and never left (excluded)

Locked up Bai Zizhou.