The irony is that I'm sure among citizens, we always feel a vague sense of frustration when police do back down from a chase, because of the dangers to all involved. We want the police to catch criminals, not lose them. We especially want police to collar juvenile delinquents, the ones who think they are impervious to law and order because of their age and their belief in their own invincibility and driving skills.
We want them to be caught, to be taught a lesson, to hopefully be put back on track before it's too late.
In this instance in Masterton it seems that the public is looking at the situation with their eyes open. The police have done their best to avoid a tragedy, by following procedure, but the deliberate actions of teenagers in a stolen car led to two people dying.
Of course the police will review the situation, study the CCTV footage, investigate and critique their officers. But I don't think the public is in any doubt about where the blame lies.