I’m not quite sure about the reasons why people in New Zealand want to bought back the death penalty, must be a desperate resource to keep the country secure and out of criminals and make the country remain safe as well as its people.

On the other hand, it is true there is no way to make sure whether someone is guilty or not for a crime at least the defendants declares themselves guilty; So the capital penalty would not be very effective due to the inaccuracy in which the legal system in every country act with regards to this issue. There have been a lot of cases in which innocent people have been accused for crimes they never committed, cases in which justice has acted in vain, taking lives of innocent people.
I think the justice concept is not possible when the participants are not 100% they can provide it; that is to say, you can’t pretend to solve a problem creating other.
In my view there are a lot of pros and cons about death penalty and to be honest I really don’t know which side to take because sometimes when I see the news and I have to see all those terrible crimes people make, the only words that came to my mind are “they really deserve death”, but is a moral issue and you couldn't expect to act in the same way criminals do, as Gandhi said “eye for an eye makes whole world blind”