"Further updates will be provided as the police investigation allows."
On September 20, police charged a man with assault and breaching a protection order after the fire.
McPherson had earlier said a man hospitalised after the fire had been charged with male assaults female and contravening a protection order.
A bedside court hearing was held the day before as he was still in hospital.
Neighbours of the Nina Place house said volcano-like 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.