While Nia's mother Lisa Kuka was at work, the toddler was left in the care of her partner Wiremu Curtis and his brother Michael. Nia's cousin Michael Pearson and his partner Oriwa Kemp were also present at the time.
But instead of caring for the little girl, the brothers inflicted horrific injuries which ultimately resulted in her death.
Nia was kicked, slapped, beaten and jumped on.
She was put in the clothes dryer for 30 minutes on a hot setting, hung on the clotheslines and spun around, burned by a fire, dragged through a sandpit and dropped from heights, amongst other things.
When the girl's mother returned home, she found her daughter unresponsive.
However, she did not seek medical assistance until the following day, after spending the night celebrating a 21st birthday.
Nia was found to have brain damage so severe she couldn't breathe for herself. She was placed on life support for 13 days before she tragically died.
The two brothers were found guilty of murder while the girl's mother was convicted of two counts of manslaughter.
Oriwa Kemp and her partner were convicted of assaulting the innocent girl.
Now, more than ten years on from her death, Kemp has found herself back in court where she had plead guilty assaulting another person.
The woman was caught stealing a bottle of coca-cola and a can of pringles.
Appearing before the court last Friday, Kemp admitted to charges of assault, theft and beaching intensive supervision conditions.
She is due to be sentenced next month.