Police have filed an extradition request for a Kenyan man they say murdered a man and attempted to kill a woman in Christchurch last year.
They say the man, Samuel Njuguna, entered the home of his estranged wife Lydia Munene and then murdered Steven Maina and attempted to kill Ms Munene.
They say he then left the country before the attack was discovered.
The head of the investigation, Detective Inspector Greg Williams, says police had organised with Mr Njuguna's family for him to return to New Zealand to face the charges but he changed his mind at the last minute.
Mr Williams says Mr Njuguna is now being sought by Kenyan authorities.