New Zealand is a small country highly dependent on the US for trade and tourism. If the US says "jump", our police and politicians are probably going to jump, whether or not it's merited. Hopefully now that the pressure is off a bit our court system can sort out the questions of merit properly.
Not sure why I'm being downvoted, but the simple fact is that there was enough evidence to have an indictment written up, signed off on and then authorities in another country agree it had enough merit to be acted upon.