The offender, an Indigenous man, was convicted of five counts of second-degree murder after setting fire to a home, killing his intimate partner and four children.
The Crown sought a 25-year period of parole ineligibility, while the defence sought 18 years, citing Gladue factors.
The court found that the extreme gravity of the offences and the compelling aggravating factors, including the creation of a firetrap and the vulnerability of the victims, meant the offender's moral blameworthiness was not diminished despite significant Gladue factors.
The court imposed a life sentence with 25 years of parole ineligibility.