Fu Yisheng let his wife vent her frustration, and at the moment when the officers were at a loss for words, he slowly spoke up, "My wife has encountered such a situation that compromised her personal safety, thinking of the innocent lives paid as the price before, she is very angry and helpless. We hope the officers will understand, but we can provide the toxicology report of the tea and the sealed tea as evidence."
The bodyguards following Lu Qingqing were very experienced and did not dispose of the tea, but brought it back instead.
As for whether the officers could use it, that was not their concern.
Typically, in their investigations, they would only use evidence collected by themselves at the scene, not provided by the involved parties, fearing tampering.
Whether it could be used or not, the officers didn't reject it outright.
As for the recording of Ya Lei bribing Scorpion to go after Lu Qingqing, it was not provided to them.