Cordons are in place as investigators begin their enquiries.
A man with injuries has been taken into custody.
"By your despicable deeds, you allowed events to unfold that caused the deaths of these two people."
The victim's relatives say she was "the beloved baby of our family".
32-year-old Venod Skantha has been convicted of her murder.
The 16-year-old was found dead in her bed in February last year.
Police have launched a homicide investigation.
We don't do a good job in New Zealand of facing the reality of men's violence against women.
The Crown and defence made their closing statements on Tuesday.
They say their offers to help talk him down were ignored.
But the Justice Minister says it can't be banned.
UK MPs have dubbed the excuse the modern version of "she was asking for it".
Police say it's still an offence to name him on social media.
"Grace was our sunshine and she will be missed forever."
The British backpacker came to New Zealand in November, 2018.
Venod Skantha was on his final warning when Amber-Rose Rush threatened to go public with allegations of his misconduct.
Anyone who sees Samuel Samson should call 111 immediately.
The witness' mother claims he told her she would be killed if she returned home.
"Don't let the world change your smile."
But he admitted exaggerating and lying to police multiple times.