C457 Venomous catamaran

Yun Zihuang used a fingerprint to compare them. This kind of thing was too simple for her, she had already taken a fingerprint on it. In the past few days, everyone's fingerprints had been quietly collected in the inner-kitchen. Although it might not be possible to find the poisoner, it was still possible to reduce the scope of the poison.

Especially this time, it was poison on some tableware