What are killing Tui?

It seems you're asking about "killing Tui," but it's unclear what you mean by "Tui."

To help me understand and give you a proper response, please provide more context:

* Who or what is "Tui"? Is it a person, a character from a book or movie, an animal, a plant, or something else?

* What is the situation? Are you asking about a specific event or scenario?

Once I have more information, I can give you a more relevant and helpful answer.