From the SMH article…
Glen Porrit has been found not guilty for murder (and instead found guilty of the lesser manslaughter charge) as Justice Higgins told the court that “he was not satisfied beyond reasonable doubt that Porritt inflicted any of the injuries with an intention to kill his mother or with reckless indifference to the probability of her dying.”
It is of course possible, based on the other claims made at the court, that he didn’t intend it…..