Inspector Dave Gaskin, Mid-South Canterbury Area Commander, said police were continuing with inquiries but were not looking for anyone in connection with Kereru's death.
The death has been referred to the coroner.
The Herald can confirm that Kereru's husband Joshua is facing criminal charges but the charges do not relate to his wife's death.
Joshua Kereru was due to appear in court yesterday for possession of a needle or syringe and assaulting police.