A no-win situation
In 1830 there was an especially violent incident involving both Māori and Pākehā. The British government agreed to send James Busby to New Zealand as 'British Resident' in 1832. He was to prevent Pākehā mistreating Māori, protect law-abiding Pākehā, and catch escaped convicts.
However, New Zealand was an independent territory, outside British law. Busby had no legal powers and no military force. At best he was a mediator.