A post-mortem on a man bashed to death in South Auckland has been completed.
Aran Jenkanying, 56, died on Saturday in Auckland Hospital four days after he and his sister Arunee Jankanying were assaulted at a house in Otara.
Police say the post-mortem shows Mr Jenkanying died of blunt-force trauma to the head.
They say the prime suspect in their homicide investigation is Patrick Young, the 42-year-old stepson of Ms Jankanying.
Police are asking that Mr Young hand himself in.