The victim's family continue to be supported by Victim Support and the investigation team as they deal with their loss, McPherson said.
"As the matter is now before the court, Police are unable to provide further comment."
Neighbours of the Nina Place house said flames lit up the night sky when the home caught alight.
"My son thought it was a volcano so we went to have a look and made sure it wasn't one of our friends or the place of someone we knew."
It was very alarming, the neighbour said.
A witness, who saw the aftermath of the blaze, earlier described the house as being torched black with only the bare structure left behind.
Fire crews and emergency staff were called to the fire at 12.10am.