Counties Manukau Police believe the death of a 17-year-old in Favona, Mangere on Saturday 3 June, 2017 was the result of a tragic accident.
Violet Tupou, who is believed to have been autistic, died after she went head-first into a drain.
The drain, just metres from her home on Enuamanu Rd was later surrounded by flowers and mementos.
Police have spoken with witnesses who found her and to other local residents who saw her prior to an apparent fall.
The matter has now been referred to the Coroner who will determine the exact cause of death.
Police will be assisting the Coroner with further enquiries.
Police extend their deepest sympathies to her friends and family at this time.